ENGINES

Question 1

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

Answer 1

N1
EPR

FCOM 2: 7.20.4/7.21.4

Question 2

What protection features are provided in the EEC Normal mode?

Answer 2

•Thrust limiting
•Maintains constant thrust
•Over-speed protection

FCOM 2: 7.20.4/.5

Question 3

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

Answer 3

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

FCOM 2: 7.20.5

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)

FCOM 2: 7.20.4

Question 5

When does the EEC select approach idle?

Answer 5

•Nacelle anti-ice is ON
•Flaps in a landing position
•Continuous ignition switch is ON
•During thrust reverser operation

FCOM 2: 7.20.5

Question 6

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

Answer 6

•Decrease thrust lever position.

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

VOL 2: 7:20.4/QRH 7.12

Question 7

What happens when you turn the Continuous (CON) IGNITION Switch ON?

Answer 7

•Selected igniters operate continuously
•Commands approach idle minimum

VOL2: 7.13.4

Question 8

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

Answer 8

•N1 & EGT

VOL 2: 7.10.1

Question 9

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

Answer 9

RED

VOL 2: 7.10.8

Question 10

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

Answer 10

•Broadband ➢Broadband vibration is the average vibration detected.

VOL 2: 7.11.6/21.14

Question 11

What 3 items will the autostart system protect the engine from
during and engine start that also will result in an
ENG 1, 2, 3, 4 AUTOSTART EICAS message ?

Answer 11

•Hot start
•Hung start
•No EGT rise

VOL 2: 7.20.7/QRH 7.2

Question 12

How is the engine thrust reverser actuated on the GE Engine?

Answer 12

Pneumatically actuated fan air.

VOL 2 7.20.15

Question 13

How is the engine thrust reverser actuated on the PW engine?

Answer 13

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

VOL 2 7.21.14

Question 14

How is the engine thrust reverser actuated on the GEnx B747-8?

Answer 14

Hydraulically actuated fan air.

VOL 2(748) 7.20.15

Question 15

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

Answer 15

Crossbleed air is recommended for in-flight start.

FCOM 2: 7.11.6

Question 16

When is ignition selected for all engines?

Answer 16

1.Trailing edge flaps are out of the up position
2.Continuous ignition switch is ON

FCOM 2: 7.20.8

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

FCOM 2; 7.20.6

Question 18

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

Answer 18

•above the lower amber band

FCOM 2; 7.20.8

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 feet

FCOM 2 747-8; 7.20.4

Question 20

GENX2B67 engine ice crystal anti icing cycle continues for __ minutes
as long as ICI conditions are detected or airplane descends below _____ feet?

Answer 20

•15 minutes
•28,000 feet

FCOM 2 747-8; 7.20.4

Question 21

When does GENX2B67 engine selects minimum or approach idle?

Answer 21

•Engine Anti-Ice ON
•Landing Gear Down
•Flaps 20 selected
•Flap in landing position
•Thrust Reverser operation

FCOM 2 747-8; 7.20.5

Question 22

Under what condition on the ground will the GEnx EEC shutdown 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

FCOM 2 747-8; 7.20.6

Question 23

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

Answer 23

•Engine shutdown between 30-360 minutes
•EGT is greater than 30◦c

FCOM 2 747-8; 7.20.7

Question 24

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

Answer 24

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

FCOM 2 747-8; 7.20.8

Question 25

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

Answer 25

•Start is achieved or EGT limit is reached

FCOM 2 747-8; 7.20.9