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TM 1-1510-223-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
*10. Autoignition - Check as follows:
a. AUTO IGNITION switches -ARM.
b. Slowly retard each POWER lever.
c.
Respective IGN ON annunciator light
illuminates at 13 to 19 % torque.
d.
Power - Establish cruise power with
autoignition armed.
e.
CONDITION lever (engine to be tested) -
Rapidly retard to IDLE CUTOFF for 3
seconds, then return to LOW IDLE.
Observe that engine relight occurs within 3
to 5 seconds. Monitor engine acceleration
and TGT rise. If relight does not occur
within limits, or acceleration or TGT do not
appear normal, abort the start. Restart
engine using Normal Procedures.
f.
Repeat substep e for opposite engine if
required.
*11. Propeller feathering - Check each en-
gine as follows:
a. Airspeed - 120 KIAS.
b.
POWER lever (engine to be feathered) -
IDLE.
c. PROP lever (engine to be feathered) - HIGH
RPM.
d. CONDITION lever (engine to be feathered) -
IDLE CUTOFF. Allow N, RPM to decay
below 20%.
e. PROP lever (engine to be feathered) -
FEATHER.
Time to feather must not
exceed 10 seconds from
2-67
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