Originally Posted by
BOAC
Lucky strike! Boeing Flt Ops Tech Bulletin 737-300/400/500 97-1 Dated April 29, 1997. ATA Number 22-31 Subject Autothrottle Operation. from Flt Crew Training PO Box 3707, Seattle.
Precised: First stage is to within 8% of target N1, then to target. THEN (and only then) pilots should adjust to +1% -0% of target. Avoid applying force to the levers unless manual intervention is intended. It also recommends NOT 'following' the levers such that you apply more than 1.5 lbs of force at the top or you may cause the clutch to malfunction. There is a 'caution' that more than 20kts of headwind may produce throttle hold before target is reached.
I always maintain the autothrottle should be allowed to TRY to set power or you may never know when it is malfunctioning.
Hi BOAC,
After having read this one I understand the following
:
1)When the PF asks for T/O thrust and pushes TO/GA, the PM is not supposed to follow the thrust levers to "adjust" them to the desired N1 value until this value has been reached, or as stated in the FCTM, if THR HOLD occurs before 84 kts (or 64 kts for my dear old originals
).
2) The CM1 (usually the Captain) should be waiting the thrust to be set at the desired N1 value before placing his hands on the thust levers.
Is that the meaning of the bulletin ?
Thank You
