April 22, 201412 yr Hi Guys, First Post !!! Hi I have been trying a No Bleeds takeoff as per the Supplementary procedures FCOMv1 SP2.7 and came across a problem. With the left pack on utilizing APU bleed for presurization there is a difference in the calculated takeoff N1 for both engines on both the FMC and Engine display(0.8% diff). The autothrottle will set the N1 when TO/GA is selected however because of the split there is obviously an assymetric thrust setting. Any ideas as how to solve this issue? It would appear that the status of the pack, i.e. operating or not determines the takeoff N1, even though that pack maybe running off of APU bleed air with no pneumatic load on the engine. Marc Holford Marc Holford
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