TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
CAUTION
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 crystals.
2.
Avionics - As required.
3.
Mission panel - Set and check as required.
*4. Electric elevator trim and autopilot/flight director operation - Check as follows:
a.
Pilot's and copilot's PITCH TRIM switches - Press to NOSE UP and NOSE DN positions, singularly and
in pairs. Check that trim wheel moves in proper direction and operates only when trim switches are
pressed in pairs. Any deviation requires that electric elevator trim be turned off and flight conducted
using manual trim.
b. DISC TRIM switch - Press to second detent and verify that electric trim disconnects and ELEV TRIM
annunciator light (in pedestal) extinguishes.
c. Flight director (FDI) and Radio Magnetic Indicator (RMI) warning flags - Check masked.
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