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-GE
EPR-PW

Question 2

What protection features are provided in the EEC normal mode?

Answer 2

1) Thrust limiting
2) Maintains constant thrust
3) Over-speed protection

Question 3

What occurs with 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

1.Nacelle anti-ice on
2.Flaps in a landing position
3.Continuous ignition switch is ON
4.During thrust reverser operation

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 EEC auto transfers control from normal mode to alternate mode

Question 7

What happens when you turn the continuous CON ignition switch on?

Answer 7

Selected igniters operate continuously
Command approach idle minimum

Question 8

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

Answer 8

N1 & EGT

Question 9

What color does 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) it will display BB, what does this mean?

Answer 10

Broadband - the average vibration detected

Question 11

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

Answer 11

Hot Start
Hung Start
No EGT rise

Question 12

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

Answer 12

Pneumatically actuated fan air

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

Question 14

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

Answer 14

Hydraulically actuated fan air

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

Question 16

When is ignition selected for all engines?

Answer 16

-Trailing edge flaps out of up position
-Continuous ignition switch ON

Question 17

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

Answer 17

One for ground
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 ___ ft?

Answer 19

30,000’

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’

Question 21

When does GEN2B67 engine select minimum or approach idle?

Answer 21

1.Engine Anti-ice on
2.Landing Gear down
3.Flaps 20 selected
4.Flap in landing position
5.Thrust reverser operation

“FFELT”

Question 22

Under what condition on 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

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 30C

Question 24

During engine start the GEnx engine EEC will attempt corrective action for what conditions?

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 and will repeat this action on subsequent reattempts until?

Answer 25

Start is achieved or EGT limit is reached