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 TM 55-1510-218-MTF
TROUBLESHOOTING
PROCEDURE
REFERENCE
BEFORE TAXIING (CONT)
Do not operate the weather radar system in
a confined space where the nearest metal is
50 feet or less from the antenna reflector.
Scanning such surfaces within 50 feet of the
antenna reflector may damage receiver crys-
tals.
5. Avionics - As required.
6. Electric elevator trim switch - On.
*7. Electric elevator trim operation -
Check as follows:
a.
Pilot and copilot pitch trim
switches - Press to NOSE UP
and NOSE DN positions, sin-
gularly and in pairs. Check that
trim wheel moves in proper di-
rection and operates only when
trim switches are pressed in
pairs. Any
deviation
requires
that electric elevator trim be
turned off and flight conducted
using only manual trim.
b.
Pilot and copilot pitch trim
switches - Press pilot's switches
in the NOSE UP direction and
press copilot switches in the
NOSE DN direction. Trim sys-
tem should not work in either
direction with the switches held
in this position (AP-106). With
the SPZ-4000 the trim system
should run in the direction
2-26
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