Originally Posted by
RatherBeFlying
Electric Trim Availability?
It's been pointed out that the range allowed for electric trim is less than can be obtained from the trim wheel (airload permitting).
Does that mean electric trim can not be used to return trim outside its range back to within its range?
No, the manual says explicitly that electric trim can always be used to bring it back into the normal range, but not to move it outside that range:
from 737NG FCOM 9.20.8 Stabilizer Trim:
In the event the stabilizer is trimmed to the end of the electrical trim limits, additional trim is available through the use of the manual trim wheels. If manual trim is used to position the stabilizer beyond the electrical trim limits, the stabilizer trim switches may be used to return the stabilizer to electrical trim limits.
Bernd