EEC Flashcards
What does the EEC use as the controlling parameter (GE)?
• N1
Note:FCOM, VOL 2; 7.20.4
What is provided in the EEC Normal mode?
What protection features are provided during engine Ground starts by the EEC?
- Thrust limiting
- Maintains constant thrust, independent of outside air temperature and pressure.
- Compensates for bleed requirements
- Overspeed protection
(FCOM, VOL 2, 7.20.5)
What action should be taken prior to manual selection of EEC alternate mode?
• Decrease thrust lever position. Thrust increases when alternate mode is
selected manually. Thrust does not change when the EEC transfers
control from normal mode to alternate mode.
Note:FCOM, VOL 2; 7.20.4
What occurs in the autothrottle system when any EEC control is changed to alternate mode?
• The autothrottles disconnect, but can be reconnected when all EECs
have been changed to alternate mode.
Note:FCOM, VOL 2; 7.20.5
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)
Note:FCOM, VOL 2; 7.20.4
What feature of the EEC provides overspeed protection?
• Fuel metering unit
Note:FCOM, VOL 2; 7.20.5
When does the EEC select approach idle?
- Flaps in a landing position
- Continuous Ignition switch is ON
- During thrust reverser operation
- Nacelle anti-icing is on
Note:FCOM, VOL 2, 7.20.5
How long is approach idle maintained after touchdown?
• 5 seconds
Note:FCOM, VOL 2, 7.20.5
What controls the engine in both normal and alternate EEC modes?
N1 RPM
When does the EEC command approach idle?
NAI on, flaps are in landing position; Cont Ign ON, Thrust reverse
What are the maximum N1 and N2 limits?
N1 – 117.5% N2 – 112.5%
What Color is Reference N1 indicator on the EICAS
Green
What Color is Command N1 indicator on the EICAS
White
What color is Maximum N1 Line on the EICAS
Amber
What color is the N1 RPM operating limit on the EICAS
red
