Originally Posted by
hans brinker
My company is in the proces of getting the FCOM. Currently using AOM+COM. Haven't read the whole FCOM yet, as it just came out last week and won't be controlling till March earliest. Our current and controlling manual has in AOM2-Normal Procedures-Taxi Expanded:
"When Engine 2 reaches idle, continue flow:
Consider starting the CHRONO to monitor engine warm-up time:
Shutdown for ≥ 2 hrs 5 min before high power.
Shutdown for < 2 hrs 3 min before takeoff."
Now, this might be because we try to fly the NEOs and CEOs the same, but it is in my book, and has nothing to do with the 2 minute center tank thing for the older CEOs.
What engine type are you using on the CEOs? Ours are IAE V2500.
My FCOM says the following, the first paragraph is for aircraft with centre tank transfer pumps (older CEOs) and the second paragraph applies to aircraft with jet pumps (newer CEOs and all NEOs):
ENG MODE
ENG MODE selector -- NORM
For additional information on the automatic starting sequence, Refer to DSC-70-80-40 Sequence of the Automatic Start.
After a shutdown period greater than 2 h, to avoid thermal shock, the pilot should operate the engine at idle or near idle for at least 5 min before advancing the thrust lever to high power. Taxi time at idle may be included in the warm-up period. The last engine started must run for at least 2 min before takeoff initiation, to ensure that takeoff is not initiated before the center tank pumps test is finished, since takeoff on center tank is prohibited.
ENG MODE
ENG MODE selector -- NORM
For additional information on the automatic starting sequence, Refer to DSC-70-80-40 Sequence of the Automatic Start.
After a shutdown period greater than 2 h, to avoid thermal shock, the pilot should operate the engine at idle or near idle for at least 5 min before advancing the thrust lever to high power. Taxi time at idle may be included in the warm-up period.
So from that it appears there is no engine warm up required for a short turn around, only a 2 minute wait time for the centre tank pumps to complete their test if fitted. It's possible that this is an error with the FCOM of course.