Engines Flashcards
In the Normal Mode, what does the EEC use as the controlling parameter for GE and PW Engines?
GE: N1
PW: EPR
What Protection Features are provided by the EEC’s in the Normal Mode?
Over-Speed Protection
Thrust Limiting
Maintains Constant Thrust
What happens to the Auto Throttles when any EEC is switched to Alternate Mode?
The Auto Throttles will Disconnect, however they can be reconnected once all EEC’s have been placed in Alternate Mode.
What EEC Normal Mode Protection Features is NOT available in Alternate Mode?
Thrust Limiting at Max N1. Max Thrust can be achieved prior to the thrust lever position being at full forward.
When do the EEC’s Command Approach Idle? (4 Items)
Nacelle Anti Ice ON,
Landing Flaps,
During Thrust Reverser Operation, and
Continuous Ignition ON
What action should be taken prior to manually selecting the EEC’s to Alternate Mode?
Thrust Lever position must be reduced. This is only required during MANUAL selection of Alternate Mode.
What happen when the Continuous Ignition Switch is turned ON? (2 Items)
Selected Igniters Operate Continuously, and
Approach Idle Minimum is commanded.
What 2 Engine Indications are always displayed on the Primary EICAS on a GE Engine Aircraft?
N1 & EGT
What colour will the EGT change to if the EGT Start or Takeoff Limit is reached?
Red
If the Airborne vibration monitoring system cannot determine the source of the Vibration (FAN, LPT, NT), what will be displayed? And what does this mean?
‘BB’: Broadband. The average vibration Detected.
What 3 items will the autostart system protected the engine from during a start, which will also result in an ‘ENG 1, 2, 3, 4 AUTOSTART’ EICAS message?
Hot Start,
Hung Start, and
No EGT Rise
How are the thrust reversers actuated on GE engines? PW Engines? GEnx?
GE: Pneumatically Actuated Fan Air
PW: Hydraulically Actuated Fan Air
GEnx: Hydraulically Actuated Fan Air
With an Engine shut down, what does ‘X-BLD’ indicate when displayed next to the respective N2?
Crossbleed Air is recommended for an in-flight restart
When is Ignition Selected for all engines? (2 Items)
Continuous Ignition Selected ON, and
Trailing Edge Flaps out of Up.
How many Igniters are selected for Ground Start? In-flight Start?
Ground Start: 1
In-flight Start: 2
What are the PW engine warm up requirements in regards to Oil Temperature before Takeoff?
Oil Temperature must be above the lower amber band
On the GEnx engines, EEC’s Command Ice Crystal Anti Icing when ICI conditions are detected above what altitude? Ice Crystal Anti Icing will continue for ____ Minutes as long as ICI conditions are detected, or the aircraft decends below ______ feet?
30,000’,
15 Minutes,
28,000’
When do GEnx engines select approach idle? (4 Items)
Engine Anti Ice ON,
Flaps 20 or greater,
Thrust Reverser Operation, or
Landing Gear is down
Under what condition on the ground will the GEnx EEC shut down an engine to provide protection against thrust asymmetry due to a control malfunction?
When the thrust lever is at or near idle, and N1 is above commanded N1, and not decelerating normally.
During Engine Start, when will GEnx engines provide an additional 40 seconds of motoring time at 20% N2?
Engine Shutdown between 30-360 Minutes, or
EGT is greater than 30.
During Engine Start, the GEnx engine EEC will attempt corrective action for what conditions? (4 Items)
Hot Start,
Hung Start,
No EGT Rise,
Compressor Stall
In-flight Start attempts on GEnx engines will increase EGT limit by 25 degrees after 4 start attempts, and will repeat this action on subsequent re-attempts until? (2 Items)
A successful start is achieved, or the EGT limit is reached.
What feature of the EEC provides overspeed protection?
Fuel Metering Unit.
What feature of the EEC provides overspeed protection?
Fuel Metering Unit.
For how long is Approach Idle maintained after touchdown?
5 seconds.
For how long is Approach Idle maintained after touchdown?
5 seconds.
