Engines

Question 1

In the Normal Mode, what does the EEC use as the controlling parameter for GE and PW Engines?

Answer 1

GE: N1
PW: EPR

Question 2

What Protection Features are provided by the EEC’s in the Normal Mode?

Answer 2

Over-Speed Protection
Thrust Limiting
Maintains Constant Thrust

Question 3

What happens to the Auto Throttles when any EEC is switched to Alternate Mode?

Answer 3

The Auto Throttles will Disconnect, however they can be reconnected once all EEC’s have been placed in Alternate Mode.

Question 4

What EEC Normal Mode Protection Features is NOT available in Alternate Mode?

Answer 4

Thrust Limiting at Max N1. Max Thrust can be achieved prior to the thrust lever position being at full forward.

Question 5

When do the EEC’s Command Approach Idle? (4 Items)

Answer 5

Nacelle Anti Ice ON,
Landing Flaps,
During Thrust Reverser Operation, and
Continuous Ignition ON

Question 6

What action should be taken prior to manually selecting the EEC’s to Alternate Mode?

Answer 6

Thrust Lever position must be reduced. This is only required during MANUAL selection of Alternate Mode.

Question 7

What happen when the Continuous Ignition Switch is turned ON? (2 Items)

Answer 7

Selected Igniters Operate Continuously, and
Approach Idle Minimum is commanded.

Question 8

What 2 Engine Indications are always displayed on the Primary EICAS on a GE Engine Aircraft?

Answer 8

N1 & EGT

Question 9

What colour will the EGT change to if the EGT Start or Takeoff Limit is reached?

Answer 9

Red

Question 10

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?

Answer 10

‘BB’: Broadband. The average vibration Detected.

Question 11

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?

Answer 11

Hot Start,
Hung Start, and
No EGT Rise

Question 12

How are the thrust reversers actuated on GE engines? PW Engines? GEnx?

Answer 12

GE: Pneumatically Actuated Fan Air
PW: Hydraulically Actuated Fan Air
GEnx: Hydraulically Actuated Fan Air

Question 13

With an Engine shut down, what does ‘X-BLD’ indicate when displayed next to the respective N2?

Answer 13

Crossbleed Air is recommended for an in-flight restart

Question 14

When is Ignition Selected for all engines? (2 Items)

Answer 14

Continuous Ignition Selected ON, and
Trailing Edge Flaps out of Up.

Question 15

How many Igniters are selected for Ground Start? In-flight Start?

Answer 15

Ground Start: 1
In-flight Start: 2

Question 16

What are the PW engine warm up requirements in regards to Oil Temperature before Takeoff?

Answer 16

Oil Temperature must be above the lower amber band

Question 17

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?

Answer 17

30,000’,
15 Minutes,
28,000’

Question 18

When do GEnx engines select approach idle? (4 Items)

Answer 18

Engine Anti Ice ON,
Flaps 20 or greater,
Thrust Reverser Operation, or
Landing Gear is down

Question 19

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?

Answer 19

When the thrust lever is at or near idle, and N1 is above commanded N1, and not decelerating normally.

Question 20

During Engine Start, when will GEnx engines provide an additional 40 seconds of motoring time at 20% N2?

Answer 20

Engine Shutdown between 30-360 Minutes, or
EGT is greater than 30.

Question 21

During Engine Start, the GEnx engine EEC will attempt corrective action for what conditions? (4 Items)

Answer 21

Hot Start,
Hung Start,
No EGT Rise,
Compressor Stall

Question 22

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)

Answer 22

A successful start is achieved, or the EGT limit is reached.