MH65 1U-65A-1 Study Flashcards
Rotor diameter
39 ft 2 in
Overall static length
44ft 5in
Height to top of rotor head
12 ft 9in
Height to top of fin
13 ft 5in
Cyclic full forward, dynamic
5 ft 2 in
What are the engines named?
Turbomecca Adriel 2c2-cg
What are the shp ratings?
1058 shp single engine operation, 853 shp for dual engine operation, 100% mob torque represents 1294 shp
What are the five modules?
- Transmission shaft and accessory gearbox
How many fuel nozzles in each engine?
2
At what rpm does the centrifugal wheel rotate inside the combustion chamber?
52000 rpm
How is the free power turbine connected to the gas generator?
It is mechanically independent
What does the reduction gearbox do?
Reduces engine power turbine speed from 39000rpm at 100% n2 to 6000 rpm engine output shaft speed
What does the gas generator turbine turn at at 100% n1?
52000 rpm
Where is n1c sent?
Ebcau and vemd
What is n1c measured by?
Electro magnetic sensor mounted on the fadec alternator driveshaft
What are n1a andn1b derived from?
Dual channel engine alternators
What does the gas generator drive?
Oil pump, starter generator, fuel pump, and faded alternator
Where are the three sensors that measure n2?
Reduction gearbox casing and power turbine case
Where is n2a transmitted?
Nr gauge in cockpit
Where are n2b and n2c transmitted?
Faded and vemd for n2 speed control and overspeed protection
What does the power turbine drive?
Output shaft and engine compartment cooling fan
Each engine is protected from overspeed by what?
It’s respective faded in conjunction with the engine interface unit (bim)
When will the fadec operate the stop electro-valve via the bim and shut the engine down?
When n2 b and n2c sensors detect an n2 speed of 122.5% /-1%
Once an engine is shut down by the faded/bim, what is inhibited?
Overspeed protection on the second engine
Once tripped the system will remain in overspeed mode until what?
Bim is reset
The bim acts as a what between the faded and respective engine?
Start relay
At what pressure does the respective eng oil 1 and eng oil 2 p, located on the wca panel, illuminates in addition to the red engine status light on the overhead quadrant?
When oil pressure drops below 25 psi minimum
What does the conformation box do?
Provides average tot signal to faded and vemd
What are the three vemd modules?
One display module and two processing modules
Where do the vemd processing modules receive info?
Both fadecs and air data unit
What are the three vemd modes?
Operational, maintenance, configuration
What do the processing modules receive info from?
Both fadecs and air data unit
What are the three modes?
Operational, maintenance, configuration
How do you set the vemd in nvg compatible mode?
Pressing both brt and brt- buttons simultaneously for 3 seconds
What does vemd stand for?
Vehicle and engine multifunction display
Under normal conditions what will the screens display?
Top LCD: first limit indicator
If either screen fails, what will remain on other screen?
Scrollable between fli, vehicle, and fuel pages. Epc and system status page will no longer be available
What is the bleed air symbol and when is it displayed?
Green and white striped rectangle, anytime respective bleed air valve is open
What parameters does the fli zone display?
Torque (trq) turbine outlet temperature (tot) and engine turbine speed ( n1)
What does the single needle in the center of the screen measure in fli?
Parameter closest to reaching it’s limit
What is displayed on fli page when training mode is active?
A yellow triangle with the letter t inside
What is displayed on fli page when bleed air is used for cabin heating?
White circle inside a white square with a diagonal bar through it
When will the fli appear in aeo (all engine operating) mode?
Both engine n1 are above 40% and neither fadec is in oei, training or idle status
What is max continuous?
8.8 fli
What is max takeoff?
10
What is max transient?
10.7
What does the hips arm counter look like?
White pie shape underneath the needle
When will the hipsarm counter appear?
When fli needle exceeds 8.8 for 5 minutes with either n1 or tot as the limiting parameter or anytime max takeoff power is exceeded and either n1 or tot is the limiting parameter
How long will the hipsarm counter flash before turning solid white at 30 minutes?
2 minutes and 30 seconds
When will the fli start mode appear?
Whenever either fadec is in stop mode or the n1 of the engine is increasing and lower than 60% or decreasing and lower than 40%
In fli start mode the digital value for tot will be underlined with flashing red line when? Solid red line?
Tot greater than 750c … Tot reaches 840c
When will the fli oei mode be displayed?
Whenever n1 of either engine is lower than 40% or either engine is in idle
What does the single engine display include?
- Yellow dashed bar indicating continuous oei power
When will the fli oei training mode be displayed?
Anytime both engine n1’s are above 40% and fadec is in training mode
What are the engine parameters displayed on the simulated failed engine?
Actual engine values of trq tot and n1
When will the oei gov mode be displayed?
Whenever n1 on both engines is higher than40% and one of the fadecs is in an oei state but not in an idle state
Oei gov mode resembles aeo display with what exceptions?
The current oei setting will be displayed in the upper information zone and the maximum transient limit ( red diode) will shift to match the max takeoff power
What parameters does the vehicle page display?
Engine oil temperature, engine oil pressure, mgb oil pressure, mgb oil temperature, primary and secondary hydraulic pressures
What does the vehicle page display?
Engine oil temperature, mgb oil temperature, engine oil pressure, mgb oil pressure, primary and secondary hydraulic pressures, oat fuel state and fuel endurance
What does the fuel page display?
Fuel pressure, fuel flow, quantity and endurance
When fuel bar and quantity change to amber and a “low” alert appear?
Whenever fuel quantity drops below 3%
What annunciations does the fuel page contain?
Eng 1 chip, eng 2 chip, mgb chip, tgb chip, servo limit, pedal limit, ldg lock
When can an epc be performed?
Whenever nr is between 340 and 360 rpm, n1 is between 92 and 101% and the bleed air valve is closed
What does the system status page display?
Fadec system data
What is generated automatically at the end of each flight?
Flight report
The maintenance mode allows the recall of what?
Past 256 internal vemd failures, last 8 epc results, last seven flight reports, last two flights worth of over limit recording
The maintenance mode is only accessible when?
On ground, and when vemd is off
How many boost pumps are incorporated into each fuel system?
2
The outlet side of the low pressure pump is fitted with a switch that will activate the eng fuel p on wca whenever fuel pressure is less than what?
8.4 psi
When fuel filt 1 or fuel filt 2 caution light illuminate?
If pressure differential across the filter increases to approximately 10 psi and pre blockage switch closes
Actual bypassing of the fuel filter occurs at what?
17 psi differential
Fuel enters the metering assembly where flow is controlled by what?
Fadec
On startup fuel flow is preset to a basic flow amount based on what to allow proper starting of the engine?
Oat and residual tot
What maintains a constant fuel pressure differential across a metering valve?
A bypass valve
What is actuated when the fadec sends a fuel demand and controls the fuel flow and returns a signal to the fadec?
Dual stepper motor
What will illuminate in the event of a dual stepper motor failure?
Fadec fail
Upon shutdown the stepper motor automatically goes to what position?
Closed
Which part of the engine driven fuel pump is centrifugal and includes an impeller that is driven proportional to the n1 speed?
Low pressure pump
Which part of engine driven fuel pump is a gear type pump?
High pressure pump
How many cells does the number 1 fuel system have?
- Right forward, left forward, left center
What is the combined capacity of the number one fuel system?
964 lbs
How many cells does the no. 2 fuel system have?
- Right center and aft
What is the combined capacity of the no. 2 fuel system?
1005 lbs
Each fuel system has an engine feed tank..what is the capacity of each tank?
43 lbs
What shall be on if operating above 8000ft to prevent a possible feed tank failure?
Both boost pumps
What is the fuel jettison rate?
270 lbs per minute
When will jettison able fuel be exhausted?
6.5 minutes
What will remain after jettison able fuel is exhausted?
43 lbs in each feed tank plus residual fuel which is retained by cells without a jettison valve…158 lbs in no. 1 system and 174 lbs in the right system
The remaining fuel after jettisoning is consumable except for what?
27 lbs in the left system, 14 lbs in the right system
What functions during hifr to provide overfill protection?
High level shutoff
What is the maximum allowable pressure for pressure refueling?
55 psi
Which cell is not provided with a variable capacitor fuel gauge transmitter?
Forward right cell
When will the feed tank 1 and feed tank 2 lights illuminate?
Feed tank drops below approximately 37 lbs
What is indicated fuel at normal hover attitude (4 degrees nose up)?
10% less than actual fuel
A pressure relief valve refitted oil to the inlet side of the pump at what?
218.5 psi
The oil filter also incorporates what?
Fuel- oil heat exchanger
The pre blockage indicator will activate at what in the oil system?
36 psi
Actual bypass of filter occurs at what?
82 psi
The low pressure switch activates when oil drops below what?
25 psi
How many magnetic plugs will give the pilots an indication on the vemd and wca panels?
One
When will the oil bypass the cooler?
Oil temp is less than 45 degrees
Each oil tank has what capacity?
2 gallons
Proper servicing levels of oil will be checked when?
Within 15 minutes of engine shutdown
Where should the oil level be during a preflight?
Between minuend max lines
What provides air flow through the coolers?
A fan driven by the mgb, above 75 kias forward, ram air alone is sufficient
What are the main functions of the fadec?
Starting, speed control, automatic backup control, overspeed protection, system monitoring, and fault management
The fadec is redundantly powered by what?
Engine driven, dual channel alternators as well as aircraft power supply
What will happen if both alternators fail?
The internal transformer rectifier will allow the fadec to operate normally on dc power
The fadec is designed to match what in both engines?
N1
What happens if neither channel can control the engine?
A major fadec failure has occured and fuel metering is frozen
Backup operation is available through what?
Emergency backup control auxiliary unit ( ebcau)
When is the fadec energized?
When the battery is turned-on and will perform a self test
Fadec fault detection logic will prevent the second engine from starting on what?
An alternate power source
What will happen if there is a failure of tot or oat inputs upon start?
Fadec will use conservative baseline parameters to avoid overtemperature
When will automatic engine shutdown occur during the start phase?
Fadec detects a tot of 840 degrees c or if the tot does not exceed 100 degrees c by 27% n1
In the event of an inflight restart, the start sequence will not initiate until when?
N1 is below 17%
What happens when the fcs is placed in the idle position?
The engine will complete the start sequence and remain at 68% n1
In idle, the fadec is powered by it’s dual channel alternator once n1 reaches what?
65%
What enables the rotor brake to remain engaged for the start of one engine only?
Engine start-low idle function
What will the engine idle at with start RBk/ on?
52%
The engine will remain at 52% with engine start- low idle function until what?
Mode is canceled and rotor brake is released
During flight, collective lever position represents the power required and will determine the n1 operating datum. What is this function also known as?
Anticipation
What are the nr hi limitations?
135 kias and 40 degrees angle of bank
How is n2 datum calculated?
Calculated according to the control mode and dependent on aircraft altitude
What is designed to increase rotor rpm at higher altitudes to maintain rotor efficiency and reduce surcharge noise signature?
Variable nr system ( which is a function of the n2 controller)
Above 1650 ft nr is increased 1 rpm for every how many feet? It will increase to a maximum of 360 rpm at what altitude?
840 ft, 5740 ft
If the nr system fails, the nr will default to what?
360 rpm
In normal torque limitation flight envelope, where does the fadec stop torque at?
110%
The fadec will begin increasing trq up to 118% (11.8) when nr decreases to what?
< 335 rpm
If nr continues to decrease to less than 317 rpm, the torque stop will increase up to a minimum of what?
125% (12.5)
At what drooping rate will the torque stop be immediately increased to a minimum of 125% as soon as nr reaches 324 rpm?
2 rpm/ second
What is a level 1 fadec failure?
Loss of redundancy
Level 1 fadec failures will be annotated by what?
Flashing gov light on the wca panel
What is a level 2 fadec failure?
Loss of non redundant resource
What will a level 2 fadec failure manifest?
Steady gov light on the wca panel
What is a level 3 fadec failure?
Major fadec failure
What is the hips arm power rating and when is hips arm used?
Rating is a dual engine rating above max continuous (8.8) and below the maximum takeoff power (10.0)… Used during demanding hover maneuvers
What is not used to determine hips arm time?
Engine torque
What is enabled any time the fadec detects a 6% n1 split or a frozen fuel meter in oei?
The oei hi operation is enabled; if in training mode, the oei lo range
How is the ebcau energized?
Switching the fadec normal/ backup control switch
What happens when the training mode is selected by placing the switch in either idle 1 or idle 2?
The simulated failed engine is governed to 320rpm n2 and the oei training mode is displayed on the vemd
What will happen to the idled engine in training mode if nr droops to 320 rpm?
The n2 controller on the idled engine will increase n1 and power the mgb to prevent excessive droop below 320 rpm
Nr will not increase above 320rpm in the training mode until what happens?
The collective is reduced to a power level below the good engines topping (approximately 62% torque)
When nr droops below 320 in training mode, the idled engine will continue to increase torque without regard to what?
Aircraft limitations
When should the training switch be switchedback to the flight position?
With the fli below8.0 and the nr stable at 355rpm
The two bimetallic fire detectors located on the accessory/ reduction gearbox are rated at what?
200* c
The fire detector located on the gas turbine is rated at what?
400* c
What do the fire bottles contain?
Bromtrifloromethane
When will the caution lights labeled l ext and r ext illuminate?
When pressure in the corresponding extinguisher drops below 230 psi
What kind of leading edge strip does each main rotor blade have?
Stainless steel
What is installed inside the leading to counteract natural flapping frequencies that result from the light composite?
Integral brass weight
What will prevent engine start unless the rotor brake is released or the start rbk function is utilized?
Fadec logic
Each tail rotor blade is constructed of composite materials by what means?
Resin transfer molding
Resin transfer molding eliminates what?
Debonding
What protects the leading edge of the tail rotor blades?
Reinforced stainless steel cap
Why are the tail rotor blades arranged in an uneven pattern?
Reduce the noise signature
The main gearbox is a ———– stage reduction gear system.
Three
At what ratio does the reduction gear system reduce engine input rpm to drive the main rotor?
17 to 1
At what ratio does the reduction gear system reduce engine input rpm to drive the tail rotor?
1.5 to 1
What does the left accessory gearbox drive?
Secondary hydraulic pump and no. 1 alternator
What does the right accessory gearbox drive?
Primary hydraulic pump and no. 2 alternator
What is the total quantity of self contained oil?
9.34 quarts
At what pressure will oil bypass to the mgb sump through the main system relief valve?
130.6 psi
What will occur when the auxiliary pump is providing mgb lubrication?
An increase in oil temperature and a lower oil pressure
At what speed is ram air sufficient for mgb oil cooling?
120 kias
At what pressure at the filter outlet will the mgb press warning light illuminate and the two master warning lights on the instrument panel to flash?
9 /- 1
What is the maximum allowable mgb oil temperature?
120*c
Where does the copilot indicator receive main rotor speed?
Tachometer generator mounted on and driven by the mgb
Where does the pilot indicator receive main rotor speed?
A phonic wheel located on the upper left housing of the mgb
When is the 3 hz modulated tone for rotor under speed heard?
When rpm is less than or equal to 345
When is the 10hz modulated tone for rotor overspeed heard?
Rpm is greater than or equal to 380
During rotor engagement, the under speed warning tone is suppressed until rotor speed reaches what?
172 rpm
The tgb reduces tail rotor drive output rpm by what ratio?
1 to .0914
How is the tgb lubricated?
Splash lubricated from a self contained oil supply
At 100% rpm, what speed does the tail rotor spin?
4000rpm
What do the mgb driven alternators supply what?
200 volts, three phase (115 volts single phase) ac
What do the engine driven generators supply?
28 volts
What does the battery supply?
24 volts
What should not be used to charge the aircraft battery?
Spike suppression swithch
What is the aircraft battery rated at?
43 amperes
How long will a fully charged battery power the dc system?
30 minutes
What supplies 28 vdc emergency power to both main dc buses?
Transformer rectifier
What powers the transformer rectifier?
Three phase 115 vac from alternator no. 2
When will the transformer rectifier energize the battery bus?
When both generators are switched off or have failed
What will happen if the voltmeter switch Is left in the bat position for an extended period of time?
Deplete the battery
What supplies power for the navigation instruments?
Two 26 vac transformers
What can not be used to start engines?
External ac
What kinds of protection do the alternator control units provide?
Short circuit, overload protection, under voltage, over voltage, underfrequency
When is under frequency protection provided?
Ground operations
Two transformers convert 115 vac into 26 vac for what?
Instrument and avionics use
Under voltage detection circuits for the 26vac transformers will illuminate fail lights when transformer outputs drop below what?
14 /- 1 volts
What is the primary hydraulic system rated at?
870 psi
What does the primary hydraulic system provide for?
Upper bodies of the main rotor servos and right body of tail rotor servo
What is the capacity of the primary reservoir?
1 gallon
Where is the clogging indicator for the primary system?
On the regulation manifold
What is the secondary system rated at?
3000 psi
Where is the clogging indicator for the secondary system?
On top of the reservoir and another on the generation manifold
When fully charged, the wheel brake accumulator will allow for how many braking cycles?
Approximately 20
Placing the elec pmp switch to bkp actuated the electric pump only and pressurizes the accumulator to a maximum of what?
1800 psi
What is the capacity of the secondary hydraulic system reservoir?
2.1 gallons
When will one isolation valve downstream of the of the 3000 to 2000 psi reducer close to isolate the landing gear, wheel brake, and talon as well as isolate normal electrical power to the rescue hoist and the other isolation valve close to isolate the left body of the dual body tail rotor flight control servo?
If secondary hydraulic reservoir drops below one gallon
What will be isolated if the tail hyd isolate switch is placed in cutoff?
Landing gear, wheel brakes, talon, normal electrical power to hoist, left body of the dual tail rotor flight control servo
The 2000 psi isolation valve is what?
Fail safe open
The tail rotor isolation valve requires what to open it?
Power
What will happen in the event of a #2 dc bus short or sec hyd breaker popped?
Tail rotor isolate valve will close
What kind of switch is the low level probe in the secondary hydraulic reservoir?
Magnetic float switch
Where is the isolation relay located?
Copilot landing/ hover light
When will the servo jam lights illuminate?
Should one or more distributor valves become jammed or of there is a loss of hydraulic pressure to either system
When will the pri servo p or sec servo p warning lights illuminate?
When hydraulic pressure to the flight controls in either primary or secondary drops below 145 psi
When will the sec hyd lo press warning light illuminate?
When secondary system hydraulic pump pressure drops below 2450 psi
When will the sec hyd hi press warning light illuminate?
When secondary system hydraulic pump pressure exceeds 3480 psi
Sec hyd lo press, sec hyd hi press, servo jam and sec hyd isolate lights will be accompanied by what?
Flashing master warning light
When will the elec pmp warning light illuminate?
Electric pump switch is positioned to bkp and system pressure rises above 1377 psi
When will both limit lights illuminate?
When aircraft is on the ground and cyclic travel exceeds 20 percent on either side of the neutral stick position
There is no limit warning for what?
Lateral cyclic travel
What do the parallel trim/feel units work in conjunction with?
Afcs
What controls the magnitude of rotor lift by varying the pitch angle on all main rotor blades simultaneously and equal?
Collective
When will the load limit warning light illuminate?
If there is a main rotor condition that could exceed design limits
How is the landing gear powered?
28 vdc from the no. 1 main bus
Retraction of the main landing gear will only take place when?
The nose wheel is centered and all of the oleo struts are fully extended
What is a restriction with skis installed?
Landing gear must remain down
What kind of gas and at what psi is the blow down bottle?
Nitrogen pressurized to 2500psi
What happens when the landing gear emergency extension handle is raised?
Nitrogen is discharged through a shuttle valve which isolates the secondary hydraulic system from the emergency system and electrical power to the landing gear solenoid valve is shut off
At what altitude will both l gear lights illuminate in conjunction with an aural intercom signal?
200 ft radar altitude if the wheels are up
The beak is free to rotate how many degrees?
360
What will prevent the probe from extending?
Two weight on wheel switches, one on each main landing gear
What are the four light segments on the master switch?
One to provide illumination and three that indicate the status of the system: 1. On indicates there is electrical power to the system 2. Arm indicates the momentary switch is in the engage position 3. Lid indicates the probe is engaged
Why is the front of turbojet boom painted black?
To reduce glare during nvg operations
What is the hoist capable of lifting?
600 lbs
What is the limit of the 10 ft cable extremities?
0-50 ft per minute
What is the speed capabilities of the hoist cable?
0-200 ft per minute (except for 10 ft extremities)
When controlling the hoist with the pilots collective, what is the speed of the hoist?
Fixed rate of 100ft per minute, except for 10 ft extremities which are limited to 50
What is the total length of the cable?
245 ft
In case of an electrical failure, the hoist may be manually operated using what?
Hydraulic controls mounted inside the hoist operators control box
When is the cable shearing power circuit armed?
Anytime the hoist selector switch is in the ply or crew position
In case of total generator failure, cable shear power is provided through what?
Battery bus
What does the emergency hoist power switch do?
Provides power directly from the battery bus should the electrical system fail
Hoist rate in the manual mode is preset at what?
50 ft per minute
Who does not have hoist controls?
Copilot
What is the hoist cams field of view?
34* at a 30 ft hover
Where is the audio signal for the hoist cam obtained?
From the alternate output of the left passenger audio control box
What kind of power does the pru utilize?
115 volt ac
Since the pru records all selected audio from the flight mechanic station, hat should be done to prevent unintentional recording of sensitive or classified information?
Secure radios over which such transmissions may be received
What does the air data system display in the cockpit?
Indicated airspeed, vertical speed, altitude
The airdta system provides airspeed and altitude data to what?
FDs, mfds, afcs, fms, air data converter, and iff transponder
The system is made up of how many separate systems?
2: for pilot and copilot
What does the pilots system consist of?
Pitot head, static ports, airspeed indicator, vertical speed indicator, altimeter encoder, static source select valve, tubing and drains
What does the folklore system consist of?
Pitot head, static ports, airspeed indicator, vertical speed indicator, altimeter, indicated airspeed sensor, electronic altitude controller, tubing and drains
What does the pilots system provide?
Airspeed, vertical speed, and altitude indications to the pilots side of the cockpit and an encoded altitude output to the iff transponder for transmission whenever mode c is interrogated
What does the cookouts system provide?
Airspeed, vertical speed, and altitude indications to the cookouts side of the cockpit
What is provided by the ias sensor and altitude controller
Airspeed, altitude, altitude rate, altitude error, and valid air data outputs
What can be done if the pilots altimeter encoder and vertical speed indicator display erratic or erroneous information?
The static press valve can be positioned to standby
The static press valve is secured to what position with breakaway wire?
Normal
Where is static pressure taken from if the static press valve is in the stand by position?
Cockpit
What does the pilots pitot static system have that the copilots does not?
Alternate static pressure source
What can be done if the copilots altimeter and vertical speed indicator display erratic or erroneous indications?
Use the static press isolating valve, which shuts off static pressure to the avionics rack
What is used to shut off pitot pressure to the avionics rack if the copilots airspeed indicator displays erratic or erroneous information?
Total press isolating valve
What provides avionics compartment. And cabin cooling through the upper duct system?
Vapor cycle air conditioning unit
What might happen if the cool switch on both fcss are idle?
Damage ecs systems
What happens any time either engine exceeds approximately 101.9 n1 /- .8%?
Bleed air shutoff valve automatically closes and the air conditioner compressor clutch disengages
When will bleed air automatically shutoff?
Engine failure
Control of the cabin heat selector knob is limited to what temperature unless placed in the override position?
68* f
When will the freon hi pres caution light illuminate and compressor disengage?
Condenser inlet pressure execs approximately 392 psi for more than 20 seconds
What will happen approximately 20 seconds after low pressure is detected at the evaporator outlet?
Compressor disengages, no visual indications
A thermostatic probe is installed in the lower right heat duct aft of the 9 degree frame, which will direct the regulator valve to close if duct temperature reaches what?
185* f
When will the heat o/heat warning light illuminate?
Temperature of approximately 275* f and above is detected at one or more thermoswitches near the fadec computers, the bleed air pneumatic control valve in the aft cabin overhead or the lower duct system
If oat is above what, the ecs system may not provide adequate cooling to the avionics rack?
85* f
When will the av rack o/ heat light illuminate?
Inlet air to av rack goes above 68f or thermoswitch detects 109.4f
When should the windshield wipers never be operated?
On a dry surface
Describe the contents of the windshield wiper plastic tank
Filled with water-ethylene glycol solution and has a capacity of three pints
At what temperature will heating of the windshields occur?
Temperature sensed atwindshiekd is below 22* c
When will heating at windshield stop?
Temperature rises to 28*c
What will happen if the temperature sensor in one windshield fails?
Control is automatically provided through the temperature regulator of the opposite windshield
Which interior lights are not nvg compatible?
Crew cabin lights
When will the emergency lights illuminate?
Impact force in ecxess of 3.2 vertical g’s or 4.0 horizontal g’s
At what rate does the anti collision lamp illuminate?
50 times per minute
The focus knob for the searchlight can adjust the beam within what parameters?
2* to 10*
What is the maximum airspeed for opening and closing the sliding door?
80kias
The sliding door must be maintained closed above what speed?
100kias
What is the maximum speed for opening and closing the hatch?
60kias forward airspeed and 30 knots sidewrd flight
When must the hatch be fully latched open?
Speeds from 60 to 80 kias forward airspeed and up to 35 knots sideward flight
What kind of portable fire extinguisher is in the cabin?
Halon
On what frequencies does the elt transmit?
121.5 and 243.0 mhz
At what distance will the elt transmit?
200 miles
When will the elt automatically start transmitting?
Impact of 5 g’s or more in the direction of flight
What is the battery life of the elt?
In excess of 100 hours
What is the underwater acoustic beacon attached to?
Vfdr
The underwater acoustic beacon can withstand deep water immersion up to what depth?
20,000ft
When will the underwater acoustic beacon automatically activate?
When immersed in water
On what frequency does the underwater acoustic beacon transmit?
37.5 khz
What is the operating life and detection range of the underwater acoustic beacon?
30 days and 2000 to 4000 yards
How many independent air bags are in each cylindrical float?
Three
What kind of air fills the floats?
Helium
With all four floats properly deployed, how long will the helicopter stay afloat?
At sea state 2 condition, at least four minutes with the waterline below the cabin floor
What kind of landing should be made with the flotation gear inflated?
Vertical landing
The floats are inflated to shape in what amount of time?
2.5 seconds
The helium cylinders are completely discharged in what amount of time?
Less than four seconds
What does the pilots adi receive signal inputs from?
Flight director computer, radar altimeter, altitude gyro no. 1, yaw rate gyro no.1 and the vor/localized receiver
Where does the copilots adi receive signal inputs from?
Flight director computer, radar altimeter, attitude gyro no.2, yaw rate gyro no.2 and the vor/ localized receiver
The attitude gyros provide inputs for which axis?
Pitch and roll
Attitude gyro no.1 send inputs to what?
Pilot adi and arcs computer
Attitude gyro no.2 send inputs to what?
Copilot adi, afcs computer, fd computer, radar antenna stabilization
When does the decision height annunciator light?
When the aircraft descends to the radar altitude that has been set on the respective radar altimeter
When will the radar altitude pointer retract from view on the adi?
Radar altitude is greater than 200 ft
What does the collective command pointer represent?
Collective pitch required to obtain the commanded flight profile
What will appear in the upper left corner of the adi whenever there is a loss of adi power or loss of a valid signal from the attitude gyros?
Red flag marked att
What will appear in the upper right corner whenever there is a loss of a valid Fdc signal?
Red flag marked fd
What will appear in the lower right corner of the adi if there is a loss of valid radar altitude?
Red flag marked alt
What is the hsi?
Horizontal situation display mode of the mfd
What will happen if there is a loss of compass validity on the mfd?
The lubber line will disappear and a slashed heading symbol to appear in it’s place….the desired course pointer will point to the original position of the lubber line and the display becomes a course deviation indicator
Why does the double bar pointer point to on the bdi?
Vor or adf/df
What does the single bar pointer point to on the bdi?
Vor or tacan
What is the digital electronic clock time controlled by?
Quartz crystal oscillator
What combines a conventional barometric type altimeter with a counter drum pointer display and an altitude reporting encoder in one self-contained unit?
Altimeter encoder
What is the difference between the altimeter encoder and the copilot altimeter?
It does not have an altitude encoder or a code off display mechanism
Where is the oat reading on the cdu taken from?
Temperature sensor on the oads assembly
Where is the oat on the vemd taken from?
Adu
The radar altimeter system provides altitude for what range?
Above ground level flight below 2500ft
When is the self test function inhibited on the radar altimeter?
If the radar altimeter is coupled to the flight director computer when t-hov, hov, aug, or appr mode is selected
What should the altitude pointer read when the radar altimeter is tested?
400 /- 40
What audio signals does the radar altimeter provide?
Whenever the help descends below 200ft and 40ft radar altitude with the landing gear not down and locked, decision height warning,
How can low altitude warnings be canceled?
Placing the horn aural warn switch in the rst position
What are the indications of the radar altimeter?
Black and yellow striped NO TRACK flag will appear in both indicators, a continuous aural tone will sound in pilot and copilot headsets, the altitude pointer will go behind the NO TRACK mask, the RA flag will appear on the MFD hover page, vertical guidance in the THOV and HOV AUGmodes of the flight director will become inoperative, the red ALT flag will appear in the lower right corner of each ADI
The primary control of the fms is through what?
Cdu’s
Utilization of the data bus is controlled by what?
System coupler computers (scc)
What does the siu do?
Provide signal interfacing and conditioning for the fms
What provides complete integration of the tuning, control, and display of the communication and navigation radios?
Scc
What do the scc’s contain to interface those avionics lru’s that are not connected directly to the dual data bus?
Interface adapter modules (iam)
During normal operation, which cdu assumes data bus control?
Pilots (bc), copilots acts as a remote terminal (rt)
What does the rt cdu do?
Processes keystrokes and displays data
Both rru’s are controlled by what?
Scc 1
What two tests does the cdu provide?
Initiated built-in-test (ibit), continuous built-in-test (cbit)
When is the ibit available?
Through activation of the weight on wheels switch
What happens when the hoist operator selects alternate?
Switched in parallel to nearest auxiliary audio control nd hd intercom capability only
What happens when the pilots audio bypass is placed in bypass?
Continued radio communication on comm 1 only
What happens when copilots bypass is placed in bypass?
Also places hoist operator in bypass ics and provides continued radio communication on comm 2 only
How can the pilot and copilot communicate in bypass?
Both switches must be in bypass
What does the remote readout unit (rru) do?
Dedicated to the display of comm 1 or comm 2 active and alternate frequency display/selection
What are the radio guard frequencies?
40.5 fm, 121.5am, 156.80 am, 243.0 am
What is the hf frequency range?
2000.0 to 29999.9 kHz
Why is the frequency range of the fm system?
150.0000 to 173.9975 MHz
How many series actuaries are there?
Four…two for roll, one for one in pitch, one in yaw
What provides airspeed inputs for the yaw axis sideslip prevention function?
The ias transducer and the lateral accelerometer
What does the trim switch on the overhead panel do?
Merely engages or disengages the electromagnetic clutch that provides cyclic stick position holding….does not turn the cyclic trim on or off
What must be on to power the trim release button?
Overhead trim switch
What will activate the force breakout switch and permit pilot induced “fly-through”?
One half pound of cyclic pressure
The afcs will maintain the attitude selected by the pilot to what limit?
45* left or right
What is the limit of pitch attitude selected by the pilot?
12*
What is not possible during single gyro operation?
Hardcover protection
What is the horizontal situation indicator (hsi)?
Full 360* compass which displays deviation data and selected course information to the aircrew for navigation
What is the map page?
A compass rose with an 80* arc displaying a pictorial of the current flight plan
What is the weather radar with map page?
(rmap) the same as the map mode with the addition of a weather radar video overlay
What is the circle map page?
(cmap) provides a 360* top-downed pictorial of the current flight plan
What is the hover page?
Provides flight director visualization and indications to attain and control the aircraft at designated hover points
What is the video page?
Displays the selected video source, wxr, flir, or video camera
On which pages are mfd and aircraft sensor failure/validity flags displayed?
All mfd pages
What is mode 1?
Security identification. 32 possible codes
What is mode 2?
Personal identification 4096 codes available
What is mode 3a?
Traffic identification. 4096 possible codes
What is mode 4?
Special encrypted military code identification
What is mode c?
Altitude interrogation 4096 codes available
What is emergency mode?
Enables all modes, and switches mode 3a to the emergency code 7700
How many hours of flight data can be recorded on the vfdr?
25 hours
How many hours of audio monitored by the pilot, flight mechanic and area microphone can be recorded by the vfdr?
Four hours
On what frequencies does the Tcas transmit and receive?
Generates 1030mhz interrogation pulses and receives 1090mhz reply
What are the four Tcas modes?
Normal, above, below, ground
What does the traffic alert symbol look like on the Tcas?
Solid yellow circle
Tcas system may not display targets in what area?
/- 8* aft and above own aircraft
When are aircraft considered a traffic alert?
It will intercept your own aircrafts track within approximately 15-30 seconds or when an intruder is within 0.55nmand /- 800 feet vertically
When does Tcas automatically revert to the standby mode?
24 seconds after the aircraft weight on wheels switch senses the aircraft has landed
At what speed does the omnidirectional airspeed sensor rotate?
720 rpm
What are the radar ranges?
2.5, 5.0, 10.0, 20.0, 40.0, 80.0, 160.0 nautical miles
What are the radar modes?
Search 1, search 2, search 3, test, wx,wxa
What are the ranges for search 1 and search 2?
2.5 to 10 nm
What ranges are search mode 3 and the weather modes best suited for?
20nm or greater
When is search 1 primarily for?
Target search when operating in a high sea state environment
What is search 2 primarily for?
High resolution target search in low sea states or precision ground mapping
What is search 3 designed for?
Maximum clutter returns as required for mapping oil slick areas
What does the scan integration switch do?
Enhances target detection in high sea clutter
The antenna will no longer be stabilized in relation to the horizon if what fails?
The copilot vertical gyro
When will the afc/agc monitor lamp illuminate?
When the radar mode select knob is in the stby or test position. If in srch 1,2,3, wx or wxa illumination will indicate a malfunction in the automatic frequency control or automatic gain control
When shall the hoist hook be in the locked position?
Direct deployments of the rescue swimmer to a vertical surface, rescue litter recoveries
The hoist should be in the locked position for what?
Rescue basket deliveries and recoveries, rescue litter deliveries
When shall the the hoist hook be in the unlocked position?
Bare hook recoveries of the rescue swimmer
When should the hoist hook be in the unlocked position?
All other rescue swimmer deployments and recoveries
When is the rescue litter used?
Where the survivor is not ambulatory
How should the sling be delivered?
Only one end connected to the hook
Describe the trail line
Triple strand polypropylene, 105 feet in length
What force will cause the weak link to fail?
300 lbs
What is the direct method of delivering a dewatering pump?
Standard hoist with or without a trail line
Describe the procedure for the indirect method for delivering the dewatering pump
The weak link end of trail line, with weight bag, is lowered to the vessel. The helicopter is moved left and a low hover is established. The non weak link end of the trail line is clipped to the two pump bridle d-rings and the pump is dropped into the water
How much does the lru-20 raft weigh?
65 lbs
How do you deliver the lru-20 raft to a vessel?
The same as a dewatering pump except the hoist hook is attached to one of the raft handlesvfor a direct delivery
How do you deliver an lru-20 to people in the water?
Indirect method. Attach float strobe and weight bag to weak end and other end to raft case handle. Attach additional flotation, such as swing to trail line.
Main gearbox fire
Corrective action:
Engine compartment fire in flight
Corrective action:
Engine compartment fire on deck
Corrective action:
Internal fire (cabin, electrical, and/or avionics)
- Designate crew member to fight fire
Smoke and fume elimination
- Heat/cool switches -off
Engine post shutdown fire
- Fadec control switch - check off
Tgb chip detected
- Establish safe altitude and airspeed for possible loss of tail rotor thrust
The big four
- Nr- maintain
N1 divergence/partial power loss
- Complete the big “4”
Major fadec/governor failure
- Complete the big 4
Minor fadec/governor failure
Complete the big four
Primary hydraulic system failure
- Cruise airspeed - 75 to 100 kias
Dual ac bus failure
Flight controls - stabilize aircraft
Ac system failure (main ac bus short, alternator, alternator control unit or 115/26 vac system failure)
- Flight controls- stabilize aircraft
Battery over temperature/thermal runaway
Batt relay switches - both off
Engine fuel pressure low
- Complete the big 4
Nose wheel shimmy damper failure
- Lift aircraft off ground immediately or reduce taxi speed
Heater overheat
Heat switch- off
Hoist cable fouled/damaged
If injury or damage is imminent:
Hoist failure
- Advise the pilot “committed” or “not committed”
Hoist boom failure
- Hoist master switch - check crew position
Hoist electrical runaway
- Secure hoist power at the hoist control panel only
Lost communications during hoisting operations
- Flight mechanic - tap the pilot and give hold signal (closed fist)
Emergency egress procedures
- Wait for all violent motion to stop
Malfunctioning cabin sliding door
Flight mechanic - remain secured to aircraft
What is the minimum required crew?
One pilot in the right seat and one crew member in the cabin
The fli will provide information in the message zone to alert crew to what limit exceedances?
Fuel, hydraulics, or engine
What are the airspeed and angle of bank limitations with nr hi?
135 kias and 40*
What is the maximum operating density altitude for takeoffs and landings?
10,000 ft
What is the maximum operating density altitude for forward flight?
18000 ft
What is the tot limit for engine starting and what are the indications?
750, will be underscored with a red blinking line when reached. If tot exceeds 840c during start cycle, it will be indicated as a solid red line and the fadec will automatically shut down the engine
What is the max tot for continuous?
891*c
What is the max tot for max takeoff 5 min?
929 *c
What is the max tot for hip/Sarm 30 min?
929* c
What is the max tot for transient 5 sec?
944*c
N1 limit values change based on what?
Altitude and oat
What happens should a difference >_ 6% n1 develop between the two engines?
Fadec assumes an engine failure and arms oei 30 second rating for both engines
When will the fadec overspeed safety feature shut down an engine?
429 rpm /- 4 rpm
When shall nr hi be used?
Hover flight greater than 10 ft gal and all lateral flight
What’s the limit on starter engagements?
Five consecutive attempts; allow a minimum of 60 seconds between start attempts and 30 minutes after the fifth attempt
What is the maximum limit for cranking?
20 seconds, max of three consecutive crankings with 5 minute cooling periods
What will happen if the crank button is used with the efsl pulled?
Severe damage to the engine fuel pump
What is the minimum fuel pressure required prior to engine start?
5.8psi
What is the minimum fuel pressure required for the starting and operating phase?
3.6 psi
What is the maximum voltage for the dc electrical system?
30 volts
What is the maximum voltage for the ac electrical system?
120 volts
What is the maximum gross weight?
9,480 lbs
Weight on the cabin deck should not exceed what?
125 pounds per square foot
What is the tiedown ring strength?
1800 lbs acting upward or through a 30 degree arc from vertical
What is the maximum allowable weight in the baggage compartment?
440 lbs, center composite panel is limited to 125 lbs, two outboard metal panels limited to 61.5 pounds per square foot
What is the maximum permissible forward airspeed?
175 kias at sea level, at a gross weight not exceeding 6614 lbs
What is the maximum cargo hook load speed?
90 kias
What is the max speed with floats armed or inflated?
90 kias
What is the maximum touchdown speed
60 kgs
What is the maximum brake speed?
Gross weight at or less than 8900lb: 38 kgs
What is the maximum light extension speed?
135 kias
What are the rotor engagement limitations?
55 knots within 20 degrees of aircraft heading, 35 knots from all other directions
What is the maximum touchdown sink rate at maximum gross weight of 8900lbs?
600 ft per minute
What is the maximum speed for touchdown?
60knots
What is the slope limitation for landing and stopping the rotor?
10 degrees
What is the maximum rotor speed for using the rotor brake?
170rpm
What is the maximum rotor braking time?
13 seconds
What is the maximum permissible hook load weight?
2000 lbs
At what airspeeds may fuel be jettisoned?
40 to 120 kias
What are the prohibited maneuvers?
- Aerobatic flight
