PPRuNe Forums - View Single Post - B747-400 Engine Idle During Reverse Thrust

30th April 2011 | 05:15

#5 (permalink)

N1 Vibes

Joined: Oct 2003

Posts: 577

Likes: 0

From: Gweriniaeth Cymru

main dog,

EEC ALT mode is because during reverse thrust the RB211 EPR reading becomes unreliable, due to turbulent air/back pressure in the fan area and the engine reverts to an EPR/N1 model.

Best Regards,

N1 Vibes