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 TM 55-1510-218-MTF
PROCEDURE TROUBLESHOOTING
REFERENCE
*4. Magnetic compass - Check for free-
B4
dom of movement.
ENGINE RUNUP
1. Nose wheel - Center.
*
G5
2. Parking brake - Set. The parking
brake must lock without undue
pressure on the brake pedals and
reIease cleanly when parking brake
handle is reset.
Monitor oil temperature closely during
ground operation with propellers in FEATH-
ER due to lack of air flow over oil cooler.
*3. Engine low idle speed - Check 52
E1
to 55% N1 (C-12C, C-12D), OR 56
TO 58% N1 (C-12F).
*4. Propeller feathering - Check as fol- F13-15
lows:
a. Condition lever - LO IDLE.
b. Left propeller lever - FEATH-
ER. Check that propeller feath-
ers with no hesitation.
c. Check for proper pedeestal con-
trol detent position.
d. Left propeller lever - HIGH
RPM.
e. Repeat procedure for right pro-
peller.
2-37
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