Engines/Thrust Levers Flashcards

1
Q

What controls the engines in all operating regimes?

A

FADECs (Full Authority Digital Engine Controls)

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2
Q

What functions does the FADEC control?

A

Fuel metering
Engine limits based on thrust lever angle
Start sequencing
Provides engine indications and thrust limit displays on the E/WD

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3
Q

What redundancy does the FADEC have?

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?

A

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

A

Hot start
Stalled start
No ignition

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6
Q

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

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?

A

Bleed demands
Approach configuration
High engine or IDG temperatures

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8
Q

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

A

Both A and B

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9
Q

When does continuous ignition automatically operate?

A

Engine flameout detection
Failure of the engine interface unit (EIU)

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10
Q

What is the active range of the A/THR?

A

Just above IDLE to the CL detent (2 engines)
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?

A

The position detent of the thrust lever

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12
Q

What are 3 ways to disconnect the A/THR?

A

Instinctive disconnect buttons
Thrust levers to IDLE
A/THR pushbutton

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13
Q

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

A

Press and hod 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?

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?

A

Thrust - TOGA
FMA - A. Floor

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16
Q

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

A

Move thrust levers to the TOGA detent
Press the instinctive disconnect button
Return thrust levers to the CL detent
Push true A/THR pushbutton to engage A/THR

17
Q

When is Alpha Floor Protection active?

A

From lift - off through 100 feet RA on approach

18
Q

When would Thrust Lock occur?

A

Thrust levers in CL detent and A/THR pushbutton on the FCU is pushed, or A/THR disconnects due to a failure

19
Q

What controls the engine LP fuel valves?

A

Engine MASTER switch
ENGINE FIRE pushbutton

20
Q

What does a fault light on the ENG panel indicate?

A

Auto start abort
Switch disagreement between HP valve and its commanded position