Engines Flashcards
On CFM56 series engines, the majority of the thrust is provided by:
The airflow which enters through the fan and bypasses the engine core.
Items critical to engine operation that are driven by the accessory gearbox are the:
- The engine oil pumps.
- The engine fuel pumps and engine fuel control unit.
- The alternator dedicated to providing electrical power to the FADEC.
— ALL OF THE ABOVE —
Each engine is equipped with a two channel Full Authority Digital Engine Control, FADEC. If one channel fails:
The other channel is fully capable of operating the engine and providing all FADEC functions.
Primary engine indications are displayed on the:
E/WD
During a manual start, how many igniters are in use?
2
True or False: The FADEC provides protection against exceeding N1, N2 overspeed, and monitors EGT during start on the ground.
True
Maximum thrust is referred as:
TOGA
During a manual start, how many igniters are in use?
2
During a manual start, how many igniters are in use?
- IAE Engine anti-ice is selected on
- A flameout is sensed
- Ignition delay is detected during an automatic start
— ALL OF THE ABOVE —
During engine starting, what valve is represented here:
Engine start valve
Maximum thrust is referred as:
TOGA
What is represented by the white circle?
Current position of the engine’s thrust lever
True or False: The CFM LEAP-1A has Thrust Control Malfunction Accommodation which, when activated on the ground, will shut down the engine if the thrust levers are in the idle or reverse position.
True
Benefits of the CFM LEAP-1A engine on the A321NX aircraft over current CFM engines include:
- Reduced fuel consumption
- Quieter operation
- Reduction in emissions
— ALL OF THE ABOVE —
What is the mandatory cool down time for a CFM LEAP-1A Engine prior to shut down?
3 minutes
The CFM LEAP-1A, FADEC will only automatically abort a MANUAL engine start if it is on the ground and_____.
- EGT Start limit is exceeded before 50% N2
- Starter Shaft Shear fault occurs
- Dual N2 sensor failure is detected
— ALL OF THE ABOVE —
The CFM LEAP-1A engine, FADEC will command both ignitors on automatically when a flameout is detected or ___
After the second failed auto start attempt
What is the FO’s “Engine Start Procedure” following the trigger “Start engine____” from the Captain?
- ENG MODE selector to “IGN/START
- ENG 1 or 2 MASTER to “ON”
- Main and Secondary Engine Idle Parameters: “Check Normal”
What are the “Engine Warm up” procedure(s)?
When engines have been shut down MORE than 1.5 hours, run them for at least 5 minutes.
When shut down LESS than 1.5 hours, run the engines for at least 3 minutes.
What are the Reverse Thrust Limitations?
Maximum reverse thrust should NOT be used below 70 KIAS (or when the inicated air speed starts to flucuate).
Idle reverse is permitted to aircraft stop
