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Study Questions > ENGINES/THRUST LEVERS > Flashcards

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 10%.
  • If this alternator fails the FADEC automatically switches to aircraft electrical power.
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5
Q

When will FADEC abort an automatic start?

A
  • Hot start
  • Stalled start
  • No ignition
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6
Q

The FADEC detects a fault during automatic start. What crew intervention is required?

A

There is no crew intervention necessary. The FADEC will discontinue the start, clear the engine, and attempt a restart (if warrant) 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 temperature
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8
Q

How many igniters fire during a normal automatic ground start sequence?

A
  • One igniter with the other serving as a backup

- The FADEC automatically alternates the igniters (A and B) at each start.

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9
Q

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

A

Two, both A and B

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10
Q

When does continuous ignition automatically operate?

A
  • NEO aircraft
    • Engine flameout detection
    • Failure of the EIU
    • In-Flight unscheduled sub idle or surge
    • Master switch cycled from ON to OFF then back to ON position
  • Non-NEO
    • all of the above
    • Engine anti-ice ON
    • approach idle
    • MAX/FLEX power selected
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11
Q

What are the five detent position of the thrust levers?

A
  • TOGA= Takeoff/go around
  • FLX/MCT= Flex/maximum continuous Thrust
  • CL= climb
  • IDLE= Idle
  • MAX REV = Maximum Reverse Thrust
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12
Q

On the ground, how can the A/THR be armed?

A
  • By setting the thrust levers in the TOGA or FLEX gate ( with a FLEX temperature inserted in the MCDU)
  • At least one FD must be On for A/THR to arm during takeoff
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13
Q

What is the active range of the A/THR?

A
  • Just above IDLE to the CL detent (2 engine)

- Just above IDLE to the MCT detent (1engine)

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14
Q

What is normal operational position of the thrust levers when A/THR is active?

A

The CL detent

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15
Q

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

A

The thrust lever angle

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16
Q

What are three ways to disconnect the A/THR?

A
  • A/THR pushbutton
  • Instinctive disconnect pushbutton
  • Thrust levers to IDLE
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17
Q

What is the preferred method of disconnecting A/THR?

A

Set the thrust lever angle to the existing EPR and push the instinctive disconnect pushbutton.

18
Q

How would the A/THR be disconnected for the remainder of the flight?

A

Press and hold the instinctive disconnect pushbutton for 15 seconds. The A/THR cannot be re-engaged once this is done. ALPHA FLOOR is also lost if this is done.

19
Q

What happens to thrust and what annunciates on the FMA during ALPHA FLOOR?

A
  • Thrust= TOGA

- FMA= “A.FLOOR”

20
Q

When does the aircraft leave ALPHA FLOOR and what does the FMA change to?

A

Upon reaching a lower angle of attack. The FMA changes to “TOGA LK”

21
Q

Following ALPHA FLOOR, how would the crew return normal A/THR function?

A
  • Press the instinctive disconnect pushbutton
  • Return Thrust levers to CL detent
  • Push the A/THR pushbutton to engage A/THR
22
Q

When is ALPHA FLOOR protection active?

A

-From lift-off through 100 ft RA on approach

23
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.
24
Q

How is A/THR normally armed?

A

By advancing the thrust levers to TOGA or FLX

25
Q

What would the FMA indication be during a takeoff roll using FLEX thrust on RWY with localizer?

A

MAN FLX, SRS, RWY, A/THR (blue)

26
Q

What would the FMA indications be during takeoff using TOGA thrust on a runway without Localizer?

A

MAN TOGA, SRS, A/THR (blue)

27
Q

What would the FMA indications be during takeoff roll of the A/THR didn’t arm on a runway with a localizer? Should the takeoff be aborted?

A
  • SRS, RWY
  • Continuing the Takeoff is a safe option, but the thrust levers must be moved to the climb detent at thrust reduction altitude and the crew must manually engaged A/THR
28
Q

How should A/THR be turned off?

A

Match the blue thrust lever angle indicators to the present thrust setting and push the instinctive disconnect pushbuttons or move THRUST LEVERS to IDLE.

29
Q

What should the pilot do to get out of THRUST LOCK?

A

Match the thrust lever angle with ENG output.

30
Q

What should pilot do to get out of TOGA LOCK?

A

Push the instinctive disconnect pushbuttons and move the THRUST LEVERS to the CL detent.

31
Q

What is the A/THR active zone for two-engine operations?

A

From slightly above IDLE to CL

32
Q

What is the A/THR active zone for single-engine operations?

A

From slightly above IDLE to MCT

33
Q

What controls the engine LP fuel valves?

A
  • Engine MASTER switch

- ENGINE FIRE pushbutton

34
Q

What does a FAULT light on the ENG panel indicate?

A
  • Automatic start abort

- Switch disagreement between HP valve and it’s commanded position.

35
Q

What is the rated thrust of each engine?

A
  • A319 V2524-A5= 23,500 lbs
  • A320 CEO V2527-A5= 27,000 lbs
  • A321 V2533-A5= 32,500 lbs
  • A320 NEO PW1127G= 27,000 lbs
36
Q

What is the required engine warm up time?

A

IAE V2500 Shutdown -2 hrs = 3mins
IAE V2500 Shutdown +2hrs = 5mins
PW 110OG Shutdown = 5mins

37
Q

What is the required engine cool down time after landing?

A

IAE V2500 = 0 mins. Rev Idle
IAE V2500 = 3mins. Greater than reverse idle
PW1100G = minimum of 3 mins, 5 mins recommended

38
Q

What does the cooling indication mean on the E/WD for NEO Aircraft?

A
  • Steady indication =Automatic dry cranking is about to begin and the timer indicates the time left before dry crank begins.
  • Pulsing indication= Automatic dry cranking is in progress.
39
Q

If icing conditions exist on the ground, how is the Engine Run-Up procedure different for NEO and Non-NEO aircraft?

A
  • IAE V2500= Accelerate to Minimum of 50% N1 at intervals not more than 15 minutes apart
  • PW1100G= Accelerate to Minimum of 60%N1 at intervals not more than 30 minutes apart
40
Q

If during start, the ground crew reports a fuel leak from the engine, what should be done by the flight crew?

A
  • IAE V2500= Run the engine for 5 minutes, if leak disappears, the flight can continue without Maintenance action.
  • PW 1100G = Abort engine start sequence, Maintenance action is required
41
Q

How is Approach Idle on NEO vs Non-NEO aircraft?

A
  • Non-NEO Minimum Approach Idle Speed occurs when:
    • Aircraft is in flight and the flaps are extended
  • NEO Minimum Approach Idle Speed occurs when:
    • Aircraft is in flight and the flaps are at CONFIG 3 or FULL or when the landing gear is down.

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