Engines

Question 1

In the normal mode, what does the EEC use as the controlling parameter for GE Engines? PW Engines?

Answer 1

GE - N1
PW- EPR

Question 2

What protection features are provided in the EEC Normal mode?

Answer 2

Thrust Limiting
Maintains constant thrust
Overspeed Protection

Question 3

What occurs in the auto-throttle system when any EEC control is switched to alternate mode?

Answer 3

Auto-throttles disconnect, but can be reconnected when all EECs have been switched to alternate mode.

Question 4

What EEC Normal mode protection feature is not available in EEC Alternate mode?

Answer 4

Thrust limiting at maximum N1 (maximum thrust can be achieved prior to thrust lever position at full forward)

Question 5

When does the EEC select Approach Idle

Answer 5

• Continuous Ignition Selected ON
• Flaps in a landing position
• Thrust reverser operation
• Nacelle Anti-Ice is ON

Question 6

What action should be taken prior to manual selection of the EEC to alternate mode?

Answer 6

Decrease Thrust Lever Position

Note: Thrust does not change when the EEC auto transfer from normal mode to alternate mode.

Question 7

What happens when you turn on the Continuous Ignition (CON) ON?

Answer 7

-Selected igniters operate continuously
-Commands approach idle

Question 8

What two engine indications are displayed full time on the Primary ECIAS on a GE?

Answer 8

N1 & EGT

Question 9

What color does EGT change to if the EGT start or takeoff limit is reached?

Answer 9

RED

Question 10

If the airborn vibration monitoring system cannot determine a source of vibration (FAN, LPT, NT) it will display BB. What does this mean?

Answer 10

Broadband
- Average vibration detected

Question 11

What 3 items will the autostart system protect the engine from during an engine start that will also result in an EICAS message?

Answer 11

-Hot Start
-Hung Start
-NO EGT Rise

Question 12

How is engine thrust reverser actuated on the GE Engine?

Answer 12

Pneumatically actuated fan air

Question 13

How is engine thrust reverser actuated on the PW Engine?

Answer 13

Powered by hydraulic pressure from the related hydraulic system to actuate fan air thrust reversers.

Question 14

How is engine thrust reverser actuated on the GEnx 747-8?

Answer 14

Hydraulically actuated fan air.

Question 15

With an engine shut down, what does “X-BLD” indication when displayed next to the N2 indication?

Answer 15

Cross bleed air is recommended for in-flight start

Question 16

When is ignition selected for all engines?

Answer 16

-Trailing edge flaps are out of up
-Continuous ignition switch is ON

Question 17

How many igniters are selected for ground start, and how many for in-flight start?

Answer 17

One igniter for ground start
Two for in-flight start

Question 18

What are the PW engine warm up requirements for oil temperature before takeoff?

Answer 18

Above the lower amber band

Question 19

GENX2B67 engine EEC’s command ice crystal anti icing when ice crystal icing conditions are detected at altitudes higher than ______?

Answer 19

30,000’

Question 20

GENX2B67 engine ice crystal anti icing cycle continues for __________ minutes as long as ICI conditions are detected or the airplane descends below _________.

Answer 20

15 minutes
28,000’

Question 21

When does the GENX2B67 engine select minimum or approach idle/

Answer 21

-Eng Anti Ice ON
-Landing Gear down
- Flaps 20
- Flaps in Landing position
- Thrust Reverser operation

Question 22

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 22

Thrust lever at/near idle
AND
Engine above command N1 speed and not decelerating normally

Question 23

During engine start when will the GEnx engine provide additional 40 seconds of motoring time at 20% N2

Answer 23

-Engine shut down between 30-360 minutes
-EGT greater than 30C

Question 24

During engine start the GEnx engine EEC will attempt corrective action for the following conditions: (4)

Answer 24

-hot start
-hung start
-no EGT rise
-compressor stall

Question 25

GEnx engine inflight start attempt will increase EGT limit by 25C after 4 start attempts adn will repeat this action on subsequent reattempts until?

Answer 25

Start is achieved or EGT limit is reached