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CH-47 (9.4) > Engines And Related Systems > Flashcards

Engines And Related Systems Flashcards

1
Q

Spell out the below engine system abbreviations:

FADEC, ECU, HMA, RDPS, PRI, REV, CONT, NG, NP, PTIT, AGB

A 
Full Authority Digital Electronic Control
Electronic Control Unit
Hydromechanical Metering Assembly 
Ratio Detector Power Supply
Primary
Reversionary 
Contingency 
Gas Producer
Power Turbine
Power Turbine Inlet Temperature 
Accessory Gear Box
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2
Q

Identify the 4 major sections of the T55-GA-714A Turbine Engine?

A

Intake, Compressor, Combustion, Exhuast

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3
Q

Identify the three engine mounted components that have impending bypass indicators that should be checked on pre-flight inspection.

A

Main Fuel Filter, In-Line Fuel Filter, Main Oil Filter

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4
Q

What NG speed constitutes an NG over speed?

A

Above 111%

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5
Q

Identify the engines torque limits (dual/single)?

A

Dual 100%, Single 123%

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6
Q

Identify at what PTIT time limited operations begin.

A

Above 816°C

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7
Q

Identify the component that supplies the engine oil pressure signal that is seen on the Powertrain portion of the engine instrument page.

A

Oil Pressure Transmitter

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8
Q

Identify the engine oil temperature limit.

A

149

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9
Q

Identify what NR percent position we normally have the NR selector switch set at?

A

100%

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10
Q

What does the load share switch on the FADEC control panel allow the pilot to choose for engine load share?

A

Torque or PTIT

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11
Q

In relation to FADEC system what component is installed in the flight control closet for the purpose of sending thrust position and rate information to the ECU’s to eliminate rotor droop?

A

Thrust CPT

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12
Q

Identify the 5 stations of the engine system.

A

Intake, Compressor, Diffuser, Combustor, Exhaust

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13
Q

What position should the ECL’s be in to see current fault BIT codes on the ECU’s?

(During start up)

A

Ground

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14
Q

An Engine FAULT detected by the ECU that does not impact the normal control of the engine is a ____ fault.

A

Soft

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15
Q

An engine FAULT that could cause unacceptable engine or aircraft performance is a ____ fault.

A

Hard

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16
Q

When the Ignition Lock Switch is IN and ON this supplies power to the circuit of what two components on the engine for the purpose of engine starting?

A

Engine Ignition Exciter, Start Fuel Solenoid Valve

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17
Q

Below 6000 ft PA what component draws fuel out of the main tank to the engines in the event the main tank boost pump fails?

A

Engine Driven Fuel Pump

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18
Q

Identify the FADEC modes of operation the Bleed Band system automatically operates.

A

Primary and Reversionary

19
Q

Name the component on the engine that supplies the PTIT data to CAAS for display on the EICAS page on the MFD

A

PTIT Buss Bar

20
Q

Name the component that supplies the NR rotor speed data to CAAS for display on the EICAS page on the MFD.

A

Permanent Magnetic Generators in the Main Generators

21
Q

Name the component that supplies the NG speed data to CAAS for display on the EICAS page on the MFD and where is it mounted?

A

NG speed sensor mounted on the Engine Oil Pump

22
Q

Name the component mounted on the engine that supplies the engine torque data to CAAS for display on the EICAS page on the MFD?

A

Torque Junction Box

23
Q

Name the component on the engine that supplies the NP speed data to CAAS on the EICAS page on the MFD.

A

NP Speed Assembly

24
Q

Name the component that eliminates small particle build up on the engine chip detector to prevent an engine chip caution.

A

Engine CHIP Fuzz Burn-off Module

25
Q

During a preflight inspection you are checking engine fluid lines for what two faults?

A

Leaks and Chaffing

26
Q

Write out the underlined Immediate Action Steps for Single Engine Failure (ENG1 FAIL or ENG2 FAIL WARNING)

A

External Load- Jettison (as required)
FLT DIR CPLR- Uncouple
DAFCS modes- OFF

27
Q

Engine fire extinguisher bottle gauges should be checked on preflight in accordance with what chart in the TM 1-1520-271-CL?

A

Engine Fire Extinguisher Bottle Pressure Chart

28
Q

Name the system that automatically controls engine operation throughout the full operating range of the engine.

A

FADEC

29
Q

ENG FAIL WARNINGS will be displayed on which MFDs when active?

A

All 5 MFDs

30
Q

The FADEC Control Panel located on the overhead console provides what to the aircraft operators?

A

Engine Control

31
Q

With the ENG COND levers in FLT and PRI mode selected NR will be maintained at what selected speed?

A

NR Switch Selection (typically 100%)

32
Q

2 places a chip caution will appear

A

MFD, Maintenance Panel

33
Q

The main fuel filter removes contaminants from fuel prior to reach what power plant component?

A

HMA

34
Q

After starting the first engine, the second engine must be started or motored for __________ within _________ .

A

10 seconds

3 minutes

35
Q

What are the two functions of the liquid to liquid cooler?

A

Dissipates heat from engine oil

Warms fuel prior to ignition

36
Q

Name the component mounted on the AGB that supplies the engine CHIP caution signal

A

Chip Detector Magnet

37
Q

Where is the Chip Detector Magnet located?

Mounted on what power plant component?

A

AGB

38
Q

What are the two sections of the HMA?

A

HMU and FPU

Hydromechanical Unit and Fuel Pump Unit

39
Q

What are the five features of the HMA?

A
  • Bleed Air Port
  • Main Metering Valve
  • 3 Phase Alternator
  • NG Speed Sensor
  • Reversionary Stepper Motor
40
Q

The engine interstate air bleed aids compressor stall by ______.
It is operated by the FADEC system’s _________.

A

Pneumatically tightening or loosening a metal band around vent holes in the compressor section.

It is operated by the FADEC systems’s HMA (hydro mechanical metering assembly)

41
Q

What is the main source of power for FADEC systems?

A

The integral alternator located in the HMA, above 48% NG

42
Q

Is fuel pressure measured after the main boost pumps or after the engine driven fuel pumps?

A

Fuel pressure is measured after the engine driven boost pumps

-10, pg. 2-53

43
Q

What are the colors of the different electrical components attached to the engine wiring harnesses and what do they indicate?

A

Sun (yellow)- PRI System
Sky (blue)- REV System
Grass (green)- Accessory
Dirt (brown)- PTIT

CH-47 (9.4) (48 decks)

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