"Now internally the ECC will make sure there will be no assymetric thrust, even if the T/L positions vary."
Thanks, TopFly, but I'm not sure that trimming will work in these circumstances (I was told that FMC trimming will not operate if the throttle levers are not within a T/L knob's width of each other(?). I don't know what the range of allowable trim is for when the A/T is engaged, but for when the A/T is only armed, the range is miniscule (for RB211's something like 0 to 0.05EPR maximum trim command, depending on airplane altitude and throttle stagger, according to my training notes).
I'm not even sure that trimming operates on the ground. The lowest I can see it happening is at 400' above the runway (in association with a thrust lever movement of 3 degrees). Doing this unlocks the EEC's from thrust hold mode) and allows the FMC to trim the engines. Or does the FMC trim the engines between 50 and 65Kts on takeoff?
Rgds.
Q.
[ 12 December 2001: Message edited by: QAVION ]