Ch 2 (Systems) (Part 2) Flashcards
From page 2-61 to the end of the chapter.
Failure of the primary HYD system will result in the loss of ___.
FMC.
Only the primary side of the servos have ___ valves to allow the ___ to affect the FLT controls.
Electrohydraulic
FMC
Where is the PRI HYD pump located?
Left side of the XMSN AGB
The PRI HYD manifold ___, ___, and ___ the flow of HYD fluid, provides ___, dirty filter, and ___ ___ indications.
Stores, filters, regulates
pressure, low level
The PRI HYD system holds __ pints of HYD fluid. The reservoir holds approx. ___ pint.
6, 1
What is the purpose of the PRI HYD air bleed valve?
Depletes pressurized air from the manifold reservoir for system repair or service
What is the purpose of the PRI HYD low level indicating switch?
It is actuated by the reservoir piston. It displays the PRI HYD LEVEL LOW caution.
What do the PRI HYD manifold pressure and return filter do?
It operates on differential pressure in the filter. Only the return filter has a bypass valve.
Name the major components of the PRI HYD. (7 total)
Air Bleed Valve Reservoir low level indicating valve Manifold Pressure and Return Filters Fluid level indicator Pressure sensor switch Pressure transducer Servos
What are the components that run off of the UTIL HYD?
Rotor break AWS turret Ammo handling system APU start motor Tail wheel UNLOCK actuator External stores elevation EMER HYD
The UTIL HYD low level and aux isolation valves cut off hydraulic fluid to flow to what?
AWS turret
External stores
Ammo carrier drive
What UTIL HYD components loose hydraulic fluid when the shutoff valve closes?
Directional servo
Tail wheel UNLOCK
What is the UTIL HYD ACC ISO Valve?
It keeps the ACC full of HYD fluid while allowing UTIL HYD fluid through to other components.
What PSI does the Rotor Break operate at while in the following modes:
- OFF
- BRK
- LOCK
30
337
3000
What are the components of IPAS Air?
Fuel boost and transfer pumps
Utility Controller
NIU
Ice detection probe
Window Defog HYD reservoirs (Hight side) ATS Louvres (fire) ECS (heat)
During dual ENG operation, where will bleed air be provided from?
Both ENGs
Other than the ENGs, what can provide IPAS air?
The APU, AGPU, or alternate aircraft. With the alternate aircraft, there is a low and high pressure bleed air port.
What Cautions are associated with IPAS?
Bleed air
What is the function of the main transmission?
Combines the two engine nose gear box inputs via the input drive shafts and reduces RPM output to the main and tail rotors.
The AGB on the Main XMSN is driven by what?
The APU driveshaft or the ENG driveshafts.
Describe how the XMSN lubricates itself.
It has two independent oil systems that have their own sump, pump, filter, and heat exchanger.
What happens if there is a loss of either the XMSN sump or heat exchanger?
The diverter (float) valve will seal off that sump to prevent a total loss of oil.
Prolonged OGE hover (__-__ minutes) with outside temp above __F (__C) may cause the intermediate and tail rotor gearboxes to overheat.
20, 30
75, 24
What monitors the temperature of the IGB?
Four thermisters.
What monitors the temperature of the TGB?
Four thermisters.
The main rotor assembly allows the rotors to ___, ___, ___, and ___ independently. They are controlled by cyclic and collective controls through a ___ mounted about the static mast. This arrangement allows the static mast to absorb all ___ loads.
Flap, feather, lead, lag
Swashplate
Flight
The ice detect probe aspirator is active when the FAT decreases to < ___C. The probe is deactivated when the FAT increases to >___C.
5, 7
When in ___ mode, ANTI-ICE system buttons are not selectable when icing conditions are detected. Once they are activated, how are they turned off?
Auto, manually
The ENG INLET ANTI-ICE includes what three parts of the ENG?
The Engine, Engine Inlet Fairings, and Nose Gearbox Fairings
Can the PNVS/TADS anti-ice be turned on when on the ground? What condition must be met for this to work? How does the PNVS/TADS anti-ice system work?
Yes, GND Override, It is accomplised via thermostatically controlled heating elements.
When the ECS is in the heated mode, will heated air continue to be provided while the ENGs are starting?
No, it will cease until the ATS drops out.
Are the heating and cooling functions of the ECS affected by whether or not the canopy is open or closed?
Yes, for cooling only. It will not work if the canopy is detected open.
Operating the ECS with all gaspers closed can result in what?
The blower will overheat and shut down.
What are the selectable ECS Temp ranges?
50F to 90F
During most ECS failure modes, the EFAB and crew station blowers will continue to circulate air to each compartment, and the ___ ___ ___ will provide ambient air to the crewstations.
Air Particle Seperator
Which component of the electrical system provides switched power?
The ELCs - the circuit breakers affect the functionality of the component they serve.
What are the three sources of power for the A/C?
115Vac
28Vdc
24Vdc (Battery)
The battery is capable of providing power to the EMER BATT BUS for ___ minutes provided the battery is at least ___% charged.
12, 80
What bus does the battery charget run off of?
115Vac (Circuit Breaker Pannel #2)
In the event of a battery or battery charger failure, what will happen with regards to battery charging?
It will cease until the fault has cleared.
Is each generator capable of supplying all electrical power to the aircraft?
Yes
What are the automatic shutdown criteria for the GCU to the Generator?
Overcurrent
Overvoltage
Underfrequency
Undervoltage
If the generators are shut down due to underfrequency, what must the pilot do in order to turn the generators back on?
Reset the PLT GEN reset pannel when Nr is greater than 93%.
What must you do if unqualified personnel are going to be in or around the PLT crewstation?
Remove the APU ECU PWR/START circuit breaker on ECU 2.
What provides IPAS air to the aircraft when the APU is on?
The APU, DC power.
How much fuel does the APU burn? What power is required for the APU to start?
175lbs per hour
- Battery Power
- Fuel (Aft fuel cell)
- UTIL Hyd pressure >2600psi
What criteria will cause the APU ECU to shut down the APU?
Loss of thermocouple Overtemp Loss of RPM Overspeed Low oil pressure Overcurrent
What are the only lighting systems available under battery power?
Flood lights, Signal lights, searchlight, and utility lights
In what type of terrain should the searchlight not be used?
High grass areas. The searchlight can get hot enough to cause things to combust.
Searchlight motion is inhibited for ___ seconds after the ON/OFF/STOW switch is placed in the STOW position.
60
Where must the FLOOD control must be less than the ____ of its range to allow SIGNAL RST.
Midpoint
When will you see the word BIAS presented below the -W- (waterline) button on the FLT page?
When one has been applied.
When the angle of bank exceeds ___ degrees, the entire symbol is shown ___ in color.
20*, white
What is the maximum allowable error for the altimeter?
70 feet.
If the HI and LO warning for the altimeter is set to ___, they are not presented to the crew.
0
The “ALTITUDE LOW” warning will sound when the following conditions have been met:
- When ALT is less than 10 ft AGL
- When ALT is 11 - 999 ft AGL
- When ALT is 1000 - 1428 ft AGL
- Equal to
- 10% below
- 100 feet below
When will time to a point not displayed on any symbology?
When GS is below 15 kts and time to the waypoint is greater than or equal to 10 hours
What must be aligned for GS to be displayed?
INUs
When a greater than ___% TQ split occurs between engines, the TQ flashes to indicate impending single engine operation.
TQ will become boxed at ___% or ___%
12
98, 108
What are the primary fuels for the AH 64D?
JP-4, JP-5, JP-8
How do you judge the level of oil in the transmission?
Looking at the #1 and #2 side sight-glasses. They should add up to being completely full.
The SP is responsible for what three basic functions?
- Commands all subsystem-initiated tests
- Monitor system statuses and fault information
- Processes information for display
What is the purpose of the DPs?
Each controls 2 MPDs. It also controls the TEDAC, VCR, and IHADSS displays. It also processes the cursors, KU, and bezel buttons.
How long will the A/C be in single-DP operations when a DP is resetting?
13-24 seconds.
The WPs command position of ___ ___ ___ ___ directly with the DPs, provides system status and ___ information to the SPs, and processes that information for display.
weapons subsystem initiated tests
fault
What function does the CIU provide?
Audible tones and warnings for all W/C/As.
What is the purpose of the MDR?
Crash survivable data storage for mishap investigation and enhanced aircraft maintenance.
How many MUX BUSSES are there in the A/C? What controls which one?
4
Channel 1 and 2 - Primary SP
Channel 3 - Primary WP
Channel 4 - FCR/RFI
What components are tied to MUX Channel 1?
Communications, electrical, keyboard, and display systems.
What components are tied to MUX Channel 2?
Nav/Flight control equipment, RWR, DTU.
In addition, there are remote terminals which allow for data transfer between the DPs, WPs, and SPs.
What components are tied to MUX Channel 3?
Weapons and sight subsystem
When will you receive a “DTU NOT ESTABLISHED” advisory?
When neither a DP is connected with the DTU or a DP has lost connection with the SP.
What mission loads by default from the DTC?
Mission 1
What files are downloaded to the DTC but are not reloaded?
Routes, Points, Targets
If a crewmember manually selects SP1 or SP2 and the selected SP fails, what happens?
The unselected SP will NOT automatically become the primary.
If the SP switch in the CPG station is not to AUTO, then the secondary SP cannot do what?
Provide internal health status updates to the primary SP.
How long will the GEARBOX VIBRATION message display during run-up? What does this mean?
5 seconds, that the MSPU has booted completely.
What does MSPU stand for and what does it do?
Modern Signal Processing Unit.
It monitors machinery health and rotor smoothing.
When will the MSPU begin to automatically monitor systems?
Rotor RPM is above 90%.
