737-800 Electric Trim Puzzle
Hi all,
Came across a strange on the other morning and can't explain it.
Scenario:
First flight of day, early AM, Cold aircraft on GPU.
Electric trip on Control column will trim back but not forward.
Electric Hydraulic pumps off.
Switch on Electric hyd pumps and bingo trims both directions.
Land at destination and try to simulate same scenario but trim fwd and back works perfectly.
Using the FCOM and Cockpit Companion, still don't know why. Surely trim on control column is electrically driven and Hydraulics should have no bearing?
Confused L-P!