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why am i saying what what way > ///systems > Flashcards

///systems Flashcards

1
Q

PTO -1
What are the sections of the engine?

A

Cold
Hot
Accessory
Power Turbine

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2
Q

PTO -1
What are the two mechanical inputs to the HMU?

A

PAS (power available spindle, connected to PCLs)
LDS (load demand spindle, connected to collective)

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3
Q

PTO -1
Functions of HMU

A

Pumps fuel at high pressure
Meters fuel to ODV
NG and fuel flow limiting
Positions variable guide vanes
Positions start bleed valve

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4
Q

PTO -1
Oil Tank Capacity

A

7 US Quarts

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5
Q

PTO -1
How does the oil cooler work?

A

Oil is cooled by transferring heat from the oil to the fuel.
Liquid to liquid.

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6
Q

PTO -1
Functions of ODV

A

Primes/sends fuel to main fuel manifold
Purges fuel from main fuel manifold on shutdown
Shuts off fuel when NP Overspeed sensed by EDECU
Shuts off fuel when Hot Start sensed by EDECU

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7
Q

PTO -1
When does the impending bypass indicator thermal lockout engage?

A

Below 38 degrees C

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8
Q

PTO -1
Engine Alternator Functions

A

Ng signal to the cockpit
Power to ignition exciter
Power to EDECU

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9
Q

PTO -1
Engine A/I One Q loss per engine

A

20%

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10
Q

PTO -1
At what NG does the engine anti-ice start bleed valve close?

A

88-92% NG

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11
Q

PTO -1
Engine Inlet Anti-Ice System
When will the advisory illuminate?

A

When the inlet temperature reaches about 93 degrees C.

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12
Q

PTO -1
Engine Inlet Anti-Ice System
How is the system controlled?

A

By ambient sense port.

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13
Q

PTO -1
Engine Inlet Anti-Ice System
Temperature Ranges

A

Above 13 C - illumination of advisory indicates a system malfunction.
Range 4-13 C - may or may not illuminate
At 4 C and Below - failure of advisory to appear in flight indicates a system malfunction

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14
Q

PTO -1
Engine anti-ice and engine inlet anti-ice valves failing to the open position power reduction.

A

Up to 20% Q per engine.

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15
Q

PTO -1
What drives the compressor?

A

Gas generator turbine

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16
Q

PTO -1
What is the Power Turbine connected to mechanically?

A

High Speed Shaft

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17
Q

PTO -1
How many stage compressor?

A

Five stage

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18
Q

During engine start, when will ignition stop?

A

Either the ignition key lock is turned OFF or starter drops out

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19
Q

What type of ignition system do we have?

A

non-continuous
AC powered
capacitor discharge
low voltage

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20
Q

What kind of starter do the engines have?

A

Pneumatic

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21
Q

What three sources are there for engine start?

A

Crossbleed
APU
Ground source

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22
Q

Describe valves during a crossbleed start

A

Air SRC switch - ENG (both engine cross bleed valves will open

Pressing start button for engine not operating - start valve opens, cross bleed valve closes

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23
Q

What are the two LRBs on each pump for? What do they do?

A

Pressure filter
Return filter

They protect the pump from high pressure in the return system, they will pop when pressure is exceeded.

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24
Q

What is the depressurizing valve in the backup pump module for?

A

It reduces the output pressure of the pump upon startup of the electric motor. It unloads the electric motor by reducing torque requirement at low RPM. Reduces the current demand during backup system startup.

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25
PTO -1 Built-In Forward Tilt
3 Degrees
26
PTO -1 Freewheel Unit Definition
Allows engine disengagement during autorotation, or in case of an inoperating engine, the accessory module will continue to be driven by the main rotor.
27
PTO -1 Transmission Accessory Module Definition
Provides mounting and drive for an electrical generator and a hydraulic pump.
28
PTO -1 Which sensor is mounted on the right accessory module?
Rotor speed sensor, provides signals for the EICAS and PFD power pod displays.
29
PTO -1 Which sensor is mounted on the left accessory module?
Rotor speed sensor, provides input signals to the EDECU for improved transient droop response.
30
PTO -1 Left Accessory Module Sensor
Oil Pressure Switch (farthest point from the pumps, it activates MAIN XMSN PRESS caution)
31
PTO -1 When does MAIN XMSN OIL HOT caution illuminate?
Transmission oil temperature reaches 140 degrees C
32
PTO -1 How many chip detectors are there?
5 Left Input Right Input Left Accessory Right Accessory Main Module
33
PTO -1 Which chip detectors incorporate a self-sealing provision so that it can be removed for visual inspection without loss of oil?
All except main transmission module
34
PTO -1 When is fuzz burn-off disabled?
When oil temperature reaches 140 degrees C
35
PTO -1 Which chip detector has a 30-second time delay?
Main Transmission Chip Detector
36
PTO -1 What sensors do the intermediate gear box and tail rotor gear box have?
Chip Sensor Temperature Sensor
37
PTO -1 How many viscous-dampened bearings are used to suspend the shafts?
Four
38
PTO -1 How many sections of drive shaft connect the main transmission to the tail rotor gear box?
Six
39
PTO -1 Where is the sensor that illuminates the MAIN XMSN OIL HOT light?
Aft and right of the main XMSN - facing rotor (main XMSN oil temp switch) It is right where the oil cooler inputs to the main module.
40
PTO -1 Where is the sensor that gives the temperature gauge (tape) readouts for main transmission?
Bottom of transmission incorporated with Main XMSN Chip detector. Between the sump and the pump
41
PTO -1 When the GEN BRG FAIL caution illuminates for more than 1 minute what must be done?
Make an entry on the appropriate maintenance form.
42
PTO -1 Main Generators Rating
115/200 VAC 40/60 kVA 400 Hz
43
PTO -1 AC/DC Converters Rating
400 ampere
44
PTO -1 Electrical power source hierarchy of priority
Either No 1 or No 2 Main Generator APU Generator External Power
45
PTO -1 DC Batteries Rating
24 volt
46
PTO -1 Primary AC Power System Delivers what?
regulated three-phase 115/200 VAC 400 Hz
47
PTO -1 Generator kVA Rating
40/60
48
PTO -1 What are the generators mounted on and driven by?
Transmission Accessory Module
49
PTO -1 Generator Control Units Job
-Underfrequency Protection (ground ops only and main gens only) -Undervoltage Protection -Overvoltage Protection -Feeder Fault
50
PTO -1 Auxiliary APU Generator Rating
115/200 VAC 35 kVA 400 Hz 3 Phase
51
PTO -1 APU Generator How is it cooled?
Air cooled
52
PTO -1 What do the converters convert from to?
Change power from 115/200 VAC into 28 VDC
53
PTO -1 External Power Monitor Panel
Undervoltage Protection Overvoltage Protection Underfrequency Protection Over frequency Protection Correct Phase Rotation
54
With only APU Gen as sole source of AC power what can we not operate?
blade de-ice
55
How is DC power supplied primary and secondary?
Two converters Two batteries are secondary power source
56
PTO -1 Fuel Flow from Supply
From Fuel Supply Fuel Boost Pump Fuel Pressure Sensor Fuel Filter (Bypass Relief Valve, Impending Bypass Indicator Button, and Differential Pressure Switch) HMU Oil Cooler ODV Fuel Injectors
57
PTO -1 Engine Driven Boost Pump is what kind? And why?
Low Pressure Suction Pump Ensures supply system is under negative pressure, lessening the potential of fire in case of fuel system damage.
58
PTO -1 Which fuel lines are self-sealing?
All except the APU fuel line
59
PTO -1 What is the capacity (in gallons) of each fuel tank?
322
60
PTO -1 How are the fuel boost pumps operated?
Electrically
61
PTO -1 Why should use of Boost Pump operation be limited?
To minimize helicopter operation with pressurized fuel lines.
62
PTO -1 During fuel dump, which pump operates?
Both simultaneously.
63
PTO -1 When pressure refueling, which tank will fill faster?
The No 1 tank. An imbalance of up to 1200lbs is possible if both are not refueled to the full level.
64
PTO -1 When aerial refueling, which tank will fill faster?
The No 2 tank. An imbalance of up to 1200lbs is possible if both are not refueled to the full level.
65
PTO -1 Gravity Refueling When will the high-level sensor illuminate the light next to the gravity fill port?
When the fuel level in the tank reaches approximately 312 gallons.
66
PTO -1 Fuel Quantity Indications Limitations
Fuel quantity indicator latency may take up to 60 seconds to stabilize. Indicated fuel quantity may lag by as much as 600lbs.
67
PTO -1 When will the MAIN FUEL tape and digital readout (along with the TOTAL digital readout) turn yellow?
Below 300lbs
68
PTO -1 When will fuel dumping stop?
When the switch is placed to OFF Or when either left or right tank reaches the actual stand pipe that prevents fuel dump below 250lbs per tank.
69
PTO -1 Which tank is the APU fed from?
Left main fuel tank

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