Operation of the electric trim switch system
should occur only by movement of pairs of
switches. Any movement of the elevator trim
wheel while pressing only one switch
element denotes a trim system malfunction.
The AP/TRIM POWER switch must be turned
OFF and flight conducted only by manual
operation of the trim wheel. Do not use
13. Elevator trim control switch OFF, then ON
annunciator should extinguish).
14. Electric elevator trim Check.
a. Elevator trim control switch ON.
b. Pilot and copilot trim switches Check.
c. Pilot and copilot. Check individual element for
no movement of trim and check proper
operation of both elements.
d. Check pilot switches override copilot switches
while trimming in opposite directions and trim
moves in direction commanded by pilot.
e. Check pilot and copilot trim disconnects while
f. Elevator trim switch OFF and ON (ELECT
TRIM OFF annunciator extinguishes).
1. BLEED AIR VALVES Both ON.
2. CABIN ALTITUDE Set 500 feet lower than field