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30 Cards in this Set
- Front
- Back
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What controls the engines in all operating regimes?
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FADECs (Full Authority Digital Engine Control)
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What functions does the FADEC control?
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- Fuel metering
- Engine limits based on thrustt lever angle - Start sequencing - Provides engine indications and thrust limit displays on the E/WD |
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What redundancy does the FADEC have?
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Dual channel redundancy - one channel is active while the other is standby
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What is the power source for the FADEC?
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- 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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When will the FADEC abort a start?
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- Hot Start
- Stalled Start - No Ignition |
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If the FADEC detects a fault during automatic start, is any crew intervention required?
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No. The FADEC will discontinue the start, clear the engine, and attempt a restart (if warranted) automatically
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When does the FADEC command a higher engine idle speed?
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- Bleed Demands
- Approach Configuration - High engine or IDG temperatures |
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How many igniters fire during a Normal automatic ground start sequence?
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- 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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How many igniters fire on a manual or in-flight start?
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Both A and B
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When does continuous ignition automatically operate?
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- Engine Anti-ice ON
- Engine flameout detection - Failure of the EIU |
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What are the 5 detent positions of the thrust levers?
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-TOGA
- FLX MCT - CL - IDLE - MAX REV |
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On the ground, how do you arm the A/THR?
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- By setting the thrust levers in the TOGA or FLEX gate (when a FLEX temp inserted in the MCDU)
- At least one FD must be ON for the A/THR to arm during takeoff |
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What is the active range of the A/THR?
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- Just above IDLE to the CL detent (2 Engines)
- Just above IDLE to the MCT detent (1 Engine) |
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What is the normal operational position of the thrust levers when A/THR is active?
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The CL detent
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What determines the maximum thrust the A/THR system will be able to command?
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The position detent of the thrust lever
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What are 3 ways to disconnect the A/THR?
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- A/THR pushbutton
- Instinctive Disconnect buttons - Thrust Levers to IDLE |
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What is the preferred method of disconnecting A/THR?
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Set the thrust levers to match the TLA to the existing N1 and disconnect using the instinctive disconnect pushbutton
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How do you disconnect the A/THR for the remainder of the flight?
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Press and hold the Instinctive Disconnect button for 15 seconds
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Will you be able to restore A/THR if you held down the Instinctive Disconnect Pushbutton for more than 15 seconds?
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No
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What would you lose if you held down the Instinctive Disconnect Pushbutton for more than 15 seconds?
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Alpha Floor Protection
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What happens to thrust and what annunciates on the FMA when you reach Alpha Floor?
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- Thrust: TOGA
- FMA: A.FLOOR |
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What occurs during Alpha Floor protection after speed increases above Vls?
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FMA changes to TOGA LK
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How do you then regain normal A/THR?
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- Move Thrust Levers to the TOGA detent
- Press the Instinctive Disconnect button - Return Thrust Levers to CL detent - Push the A/THR pushbutton to engage A/THR |
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When is Alpha Floor Protection active?
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From lift-off through 100' RA on approach
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When would Thrust Lock occur?
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- Thrust levers in CL detent and A/THR pushbutton on the FCU is pushed, or
- A/THR disconnects due to a failure |
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Explain the Normal Start sequence.
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- ENG MODE to IGN/START
- ENG MASTER to ON - Observe Start Valve Open and gray N2 background - At 16% N2 Ignition (A or B) on - At 22% N2 HP Fuel - At 50% N2 starter cutout - Approximately 58% gray N2 background disappears - Idle at 60% |
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Explain the Manual Start sequence.
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- ENG MODE to IGN/START
- ENG MAN START pushbutton ON - At maximum N2 motoring speed (Min 20%), ENG MASTER ON - Observe AB ignition, fuel flow increase, EGT and N1 increase in 15 seconds - At 50% observe N1 starter cutout and Ignition off - ENG MAN START pushbutton OFF |
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What control the engine LP fuel valves?
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- Engine MASTER switch
- ENGINE FIRE pushbutton |
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What does a fault light on the ENG panel indicate?
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- Auto Start Abort
- Switch disagreement between HP valve and its commanded position |
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What is the rated thrust of each engine?
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- A319: 23,500 lbs
- A320: 27,000 lbs |
