Operation of the electric trim switch system
should occur only by movement of pairs of
switches. Any movement of the elevator trim
wheel while depressing 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.
b. Pilot And Copilot Trim Switches Check
individual element for no movement of trim,
then check proper operation of both elements.
c. Pilot Trim Switches Check that pilot
switches override copilot switches while
trimming in opposite directions, and trim
moves in direction commanded by pilot.
d. Pilot And Copilot Trim Switches Check trim
disconnects while activating pilot or copilot
trim disconnect switches.
6. AP XFER Switch Select copilots side and
repeat steps 1 through 5.
Brake deice control valves may become
periodically. One cycle of the valves is
required daily regardless of the weather
1. BLEED AIR VALVES OPEN.
2. BRAKE DEICE ON, annunciator illuminated.