B747 ENGINES EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
In the normal mode, what does the EEC use ad the controlling parameter for the
GE engines? For PW engines?
N1
EPR
What protection features are provided in the EEC Normal Mode
Thrust limiting
Maintains constant thrust
Over-speed protection
What occurs with the auto-throttle system when any EEC control is switched to
alternate mode
The auto-throttles disconnect, but can be reconnected when all EECs have been
switched to alternate mode
What EEC normal mode protection feature is not available in EEC Alternate mode
Thrust limiting at maximum N1 (maximum thrust can be achieved prior to thrust lever
position at full forward)
When does the EEC select approach idle
Nacelle anti-ice ON
Flaps in landing position
, Continuous ignition switch ON
During thrust reverser operation
What action should be taken prior to manual selection of EEC alternate mode
Decrease thrust lever position.
NOTE: Thrust does not change when the EEC auto transfers control from normal mode
to alternate mode
What happens when you turn the Continuous IGNITION switch ON
Selected igniters operate continuously
Commands approach idle minimum
What two engine indications are displayed full time on the Primary EICAS on a GE
N1
EGT
What color does 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) it will display "BB" What does this mean?
Broadband (broadband vibration is the average vibration detected)
What 3 items will the autostart system protect the engine from during an engine
start that also will result in an ENG 1,2,3,4 AUTOSTART EICAS message
Hot start
Hung start
No EGT rise
How is the engine thrust reverser actuated on the GE engine
COMPLETE SOLUTIONS VERIFIED
In the normal mode, what does the EEC use ad the controlling parameter for the
GE engines? For PW engines?
N1
EPR
What protection features are provided in the EEC Normal Mode
Thrust limiting
Maintains constant thrust
Over-speed protection
What occurs with the auto-throttle system when any EEC control is switched to
alternate mode
The auto-throttles disconnect, but can be reconnected when all EECs have been
switched to alternate mode
What EEC normal mode protection feature is not available in EEC Alternate mode
Thrust limiting at maximum N1 (maximum thrust can be achieved prior to thrust lever
position at full forward)
When does the EEC select approach idle
Nacelle anti-ice ON
Flaps in landing position
, Continuous ignition switch ON
During thrust reverser operation
What action should be taken prior to manual selection of EEC alternate mode
Decrease thrust lever position.
NOTE: Thrust does not change when the EEC auto transfers control from normal mode
to alternate mode
What happens when you turn the Continuous IGNITION switch ON
Selected igniters operate continuously
Commands approach idle minimum
What two engine indications are displayed full time on the Primary EICAS on a GE
N1
EGT
What color does 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) it will display "BB" What does this mean?
Broadband (broadband vibration is the average vibration detected)
What 3 items will the autostart system protect the engine from during an engine
start that also will result in an ENG 1,2,3,4 AUTOSTART EICAS message
Hot start
Hung start
No EGT rise
How is the engine thrust reverser actuated on the GE engine
