TM9-1240-401-34&P
MALFUNCTION
TEST OR INSPECTION
LOCATION
CORRECTIVE ACTION
CROSS-LEVEL MECHANISM
2. CROSS-LEVEL MECHANISM KNOB(2) IS ERRATIC
AND ROUGH DURING MOVEMENT.
Check for worn wormshaft.
Replace wormshaft assembly
3. CROSS-LEVEL MECHANISM KNOB (2) EXCEEDS
0.5 MIL BACKLASH.
Replace wormshaft assembly
Step 2. Check for worn or bent wormshaft.
Replace wormshaft assembly
4. CROSS-LEVEL MECHANISM KNOB (2) REQUIRES
TORQUE IN EXCESS OF 11 POUND-INCHES
(1 .24 N-M) TO ROTATE.
Check for worn or bent wormshaft
Replace wormshaft assembly
LEVEL ASSEMBLY
PITCH LEVEL (4).
Observe visually.
a. Replace burned out LEDs
b. Replace defective toggle switch
c. Clean or replace defective
4-7