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Forum: Tech Log

27th Aug 2015, 14:11

Replies: 24

B777 EEC functions

Views: 20,215

Posted By tdracer

In Normal mode, the amber line (N1 or EPR Max) is...

In Normal mode, the amber line (N1 or EPR Max) is provided by the EEC. In Alternate mode, it comes from the FMC since EEC is now in an 'unrated' mode (if the FMC has detected unreliable air data,...

Forum: Tech Log

26th Aug 2015, 20:44

Replies: 24

B777 EEC functions

Views: 20,215

Posted By tdracer

Alternate mode always provides equal or greater...

Alternate mode always provides equal or greater EPR/N1 to Normal mode at the same throttle position.
When the EEC automatically "reverts" to Alternate mode ("Soft" Alternate), it will latch in any...

Forum: Tech Log

25th Aug 2015, 23:32

Replies: 24

B777 EEC functions

Views: 20,215

Posted By tdracer

Overboost is N1/EPR higher than the max rating...

Overboost is N1/EPR higher than the max rating for the ambient conditions (i.e. above Takeoff or Max Con, depending on altitude/airspeed). In Normal mode, overboost is prevented by the EEC.

In...

Showing results 1 to 3 of 3