Dejackal

Yes both bleeds switches are off. I refererenced the supplement to perform the procedure. Thanks yes I had realized the pack would provide air conditioning as well but did not write it in the original post. Nice work on the autoland presentation by the way. It was very well done. Marc Holford

Thanks Guys, Kevinh :That is what I thought. Matt C : Yes both packs in Auto but in that scenario only the Left Pack would be operative as that would be getting air from the APU. Marc Holford

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 Sorry for the multiple posts. The forum gave me an error message when I tried to post, so I repeated twice. But obviously each attempt was succesful. Marc Holford

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

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