Engines / Thrust Levers - Rev 04 Flashcards

1
Q

What controls the engines in all operating regimes?

(FCOM-DSC-70-20)

A

FADECs (Full Authority Digital Engine Controls)

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2
Q

What functions does the FADEC control?

(FCOM-DSC-70-20)

A

a. Fuel metering

b. Engine limits based on thrust lever angle

c. Start sequencing

d. Provides engine indications and thrust limit displays on the E/WD

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3
Q

What redundancy does the FADEC have?

(FCOM-DSC-70-20)

A

Dual channel redundancy – one channel is active while the other is standby

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4
Q

What is the power source for the FADEC?

(FCOM-DSC-70-20, FCOM-DSC-70-98)

A

a. The system has its own alternator making it independent of the aircraft electrical system when N2 is above a set value

b. If this alternator fails the FADEC automatically switches to aircraft electrical power

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5
Q

When will the FADEC abort a start?

(FCOM-DSC-70-80-40)

A

a. Hot start

b. Stalled start

c. No ignition

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6
Q

If the FADEC detects a fault during automatic start, is any crew intervention required?

(FCOM-DSC-70-80-40)

A

No. The FADEC will discontinue the start, clear the engine, and attempt a restart (if warranted) automatically.

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7
Q

When does the FADEC command a higher engine idle speed?

(FCOM-DSC-70-40-40, FCOM-DSC-70-40-50)

A

a. Bleed demands

b. Approach Configuration

c. High engine or IDG temperatures

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8
Q

How many igniters fire on manual or in-flight starts?

(FCOM-DSC-70-80-30)

A

Both A and B

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9
Q

When does continuous ignition automatically operate?

(FCOM-DSC-70-80-30)

A

a. Engine flameout detection

b. Failure of the Engine Interface Unit (EIU)

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10
Q

What is the active range of the A/THR?

(FCOM-DSC-70-30-20, FCOM-DSC-22-30-90)

A

a. Just above IDLE to the CL detent (2 engines)

b. Just above IDLE to the MCT detent (1 engine)

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11
Q

What determines the maximum thrust the A/THR system will be able to command?

(FCOM-DSC-70-30-30)

A

The position detent of the thrust lever

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12
Q

What are 3 ways to disconnect the A/THR?

(FCOM-DSC-22-30-90)

A

a. Instinctive Disconnect buttons

b. Thrust Levers to IDLE

c. A/THR push button

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13
Q

How do you disconnect the A/THR for the remainder of the flight?

(FCOM-DSC-22-30-90)

A

Press and hold the Instinctive Disconnect Pushbutton for 15 seconds

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14
Q

What would you lose if you held down the Instinctive Disconnect Pushbutton for more than 15 seconds?

(FCOM-DSC-22-30-90)

A

Alpha Floor Protection

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15
Q

What happens to thrust and what annunciates on the FMA when you reach Alpha Floor?

(FCOM-DSC-22-30-90)

A

a. Thrust – TOGA

b. FMA – A.FLOOR

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16
Q

What occurs during Alpha Floor protection after speed increases above Vls?

(FCOM-DSC-22-30-90)

A

FMA changes to TOGA LK

17
Q

How do you regain normal A/THR when in TOGA LK or THR LK?

(FCOM-DSC-22-30-90)

A

a. Move Thrust Levers to the TOGA detent

b. Press the Instinctive Disconnect Button

c. Return Thrust Levers to CL detent

d. Push the A/THR pushbutton to engage A/THR

18
Q

When is Alpha Floor Protection active?

(FCOM-DSC-22-30-90)

A

From lift-off through 100 feet RA on approach

19
Q

When would Thrust Lock occur?

(FCOM-DSC-22-30-90)

A

a. Thrust levers in CL detent and A/THR pushbutton on the FCU is pushed, or

b. A/THR disconnects due to a failure

20
Q

What controls the engine LP fuel valves?

(FCOM-DSC-70-40-10)

A

a. Engine MASTER switch

b. ENGINE FIRE pushbutton

21
Q

What does a fault light on the ENG panel indicate?

(FCOM-DSC-70-90)

A

a. Auto start abort

b. Switch disagreement between HP valve and its commanded position