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TM-1-1510-225-MTF Army Model C-12 Aircraft Manual | Next
Engine cleanup |
TM 1-1510-225-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
LOW SPEED SYSTEMS CHECK (CONT)
(b) Slowly retard each POWER
lever individually.
(c) Respective IGNITION 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 ITT rise. If
relight does not occur within lim-
its, or acceleration or ITT do not
appear normal, abort the start.
Restart engine using Normal Pro-
cedures.
(f) Repeat substep e for opposite
engine if required.
*9. Propeller feathering - Check each
engine as follows:
F14,15
(a) Airspeed - 120 KIAS.
(b) POWER lever (engine to be
feathered) - IDLE.
(c) PROP lever (engine to be feath-
ered) - HIGH RPM.
(d) CONDITION lever (engine to be
feathered) - IDLE CUTOFF.
Allow N1, RPM to decay below
20%.
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