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B737 Module 3 and 4 > ATA 70-80 Engine > Flashcards

ATA 70-80 Engine Flashcards

1
Q

In which manual is ATA chapter 70 located?

A

AMM PT 2

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2
Q

What is ATA 70 used for?

A

Provides a review for process and practices used on Leap Engine

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3
Q

Summarize the procedure for opening engine fan cowlings.

A

Retract and lock out leading edge flaps/slats, push the latch to trigger to release a fan cowl latch, rotate the latch to unhook the latch from the other side of the fan cowl.

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4
Q

Which of the engine cowlings, when open, will not be damaged if the leading
edge devices are extended?

A

Inboard Fan Cowl-Mid Open
Outboard Fan Cowl- Mid or Full open
Outboard TR-Deployed

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5
Q

Describe the engine configuration: Compressors/stages, Turbines/stages.

A

LPC: 4-stage compressor
HPC: 10-stage compressor
HPT: 2-stage turbine
LPT: 5-stage turbine

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6
Q

There are 5 main bearings that support the N1 and N2 shafts located in 3 oil sumps from front to rear of each engine, what type of
bearing is each of them?

A

A Sump: 2 ball bearings (2B and 3B) and 2 roller bearings (1R and 3R).
B Sump: 1 roller bearing (number 4)
C Sump: 1 roller bearing (number 5)

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7
Q

How is fan trim balance provided?

A

N1 speed sensor

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8
Q

List the components attached to the front and rear side of the accessory gearbox.

A

Front side: N2 speed Sensor, Handcranking drive pad, Oil Temperature sensor, Starter, IDG, Hydraulic pump

Rear Side: Main Fuel Pump, Lubrication unit with oil filter cartridge and magnetic scavenge screen plugs and permanent magnetic alternators.

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9
Q

What is the purpose of the servo fuel heater?

A

Heats up fuel that goes to the SCU and cools scavenge oil

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10
Q

What is the purpose of the Split Control Unit?

A

To send servo fuel pressure to move the actuator in the LPTACC valve

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11
Q

Describe how the EEC can be powered.

A

Either one of the two channels (Channel A and Channel B)

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12
Q

What does the CONTROL light on the P5 aft Engine Control Panel indicate if
illuminated?

A

A no-dispatch fault has occurred

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13
Q

How does the EEC get the engine thrust rating?

A

Data entry plug

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14
Q

What is the purpose of the ignition selector switch on the engine start panel?

A

Allows you to choose which ignition exciter you want to give power to. (Left, Right, or Both)

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15
Q

Where are the autothrottle switch packs located?

A

Under the flight deck

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16
Q

What is ATA 70 about?

A

A review and reminder of the processes used

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17
Q

What does the Engine ID plug give?

A

Selected thrust rating data to the electronic engine controls

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18
Q

When is it only allowed to go near an engine in operation?

A

Engine is at idle
You can speak with people in the flight compartment
For additional safety wear a safety harness when the engine is in operation

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19
Q

The SDOS and the HOR together lock the fan cowl open for safety True or False?

A

True

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20
Q

How many Hold open rods(HOR) are there?

A
  1. (1 for each fan cowl)
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21
Q

The permanent magnet alternator supplies power to the EEC’s at what N2 speed?

A

> 8.5%

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22
Q

What kind of engine is the LEAP engine?

A

High bypass, dual rotor, axial flow turbofan engine.

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23
Q

What does the N2 shaft turn?

A

The AGB(Accessory Gearbox)

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24
Q

What does the balance procedure for the fan blades use?

A

Different weight balancing screws installed in the platform front shroud under the spinner.

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25
Q

What controls the engine idle speed?

A

EEC

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26
Q

Are there any mechanical adjustments for idle speed?

A

No

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27
Q

Where is the fuel pump located?

A

AFT side of the AGB.

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28
Q

What inputs does EEC channel A receive?

A

AC transfer bus power, PMA power, AC standby bus power

29
Q

What happens if the pressure difference becomes too large?

A

A filter bypass light comes on, this light is on the P5 fuel control overhead panel

30
Q

Where are the igniters located?

A

The left ignition igniter is on the left side of the combustor near the 6:00 o’clock position. The right one is on the right side of the combustor at the 5:00 o’clock position

31
Q

How many ignition selector switches are there?

A

3

32
Q

What does the HPTACC system control?

A

Cooling air flow to the external parts of the HPT case. This cooling air adjust the clearance between the HPT shrouds and rotor blades.

33
Q

What does the LPTACC system control and do?

A

Cooling air flow to the external parts of the LPT case. Keeps the clearance between the LPT shrouds and rotor blades small

34
Q

When do the VSV’s and IGV’s open?

A

When the N2 increases(more air more open less air less open)

35
Q

Where is the autothrottle assembly?

A

Underneath the flight deck

36
Q

Where is the N1 speed sensor installed?

A

A guide tube in a strut at the 5’00 o’clock position of the fan hub.

37
Q

How many connectors does the N1 sensor have?

A
  1. One for the DPCs, one for EEC channel A and one is for EEC channel B
38
Q

Where does engine exceedance data show up?

A

Engine exceedance data maintenance pages

39
Q

How many actuators does each T/R half have?

A
  1. The top one has lock mechanism and LVDT, the middle one has only a locking mechanism and the bottom one is non-locking.
40
Q

Where does vibration data go?

A

From the DPC to the Display Unit, Network File Server of the onboard network system and the Digital Flight Data Acquisition Unit.

41
Q

The outboard actuator is up sized to allow the outboard thrust reverser to open to a locked position of what?

A

55 degrees

42
Q

How many engine cowl latches are there?

A

9

43
Q

What does the TR system use?

A

Electrically controlled and hydraulically powered

44
Q

What connects to the bottom hydraulic actuator on each T/R half?

A

A sync lock

45
Q

How does the sync lock work during normal operation?

A

It will energize to unlock.

46
Q

Each module has a handle that ____________

A

Allows the T/R to be deactivated for maintenance

47
Q

The manual deactivation panel has a hole for ___________

A

Manual deactivation pin

48
Q

Where does the oil from the tank go to?

A

A lubrication unit through an internal anti-leak check valve.

49
Q

Where is the engine oil tank?

A

Right Hand side of the fan case.

50
Q

Where is the oil level sight gauge located?

A

Front of the oil tank

51
Q

Where does the oil go to after the previous areas?

A

Six scavenge lines with 4 magnetic plugs

52
Q

Does the oil supply pump control the output pressure?

A

No, the oil pressure only changes when the engine speed changes.

53
Q

Where is the anti-leak valve?

A

In the lubrication unit

54
Q

A latching solenoid holds the start switch in the GRD position until __________________?

A

EEC commands the solenoid to release

55
Q

How does the EEC command the solenoid to release?

A

Engine starter cutout discrete command

56
Q

How is the starter controlled?

A

EEC

57
Q

When does the start valve close and remove pneumatic power from the starter?

A

55% N2

58
Q

When does the starter receive a continuous flow of oil and from where?

A

When the engine turns and from the AGB

59
Q

What are two types of engine airflow?

A

Engine cooling and compressor airflow

60
Q

Does engine exceedance appear during flight?

A

No, only on ground when the engines have stopped running.

61
Q

When do you check and if required service engine oil?

A

Not less than 5 minutes and not more than 60 minutes after engine shutdown

62
Q

Where does the air starter get lubrication from?

A

Continuous supply from the gearbox

63
Q

What does the T/R system use to move the translating sleeves?

A

Hydraulic actuators

64
Q

The sync lock energizes to__________?

A

Unlock

65
Q

What angle should you approach the engine at?

A

45 degrees

66
Q

What are the balance procedures for the fan blades

A

different weight balancing screws installed in the platform front shroud underneath the spinner

67
Q

Thrust resolver is located where?

A

Autothrottle assembly under the flight deck

68
Q

How many oil line pumps are there?

A

7

69
Q
A

B737 Module 3 and 4 (11 decks)

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