TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
*9. Propeller synchrophaser - Check capturing ability of the synchrophaser by establishing a small out of
synchronization condition, then turning the synchrophaser on. Synchronization should be established and
held within a few seconds.
10.
Speed check at maximum cruise power - Perform as required (Section IV).
11.
Maximum power lever position check - Perform as required (Section IV).
12.
Engine acceptance check - Perform as required (Section IV).
*13. Engine ice vanes - Check operation as follows:
CAUTION
After the ice vanes have been manually extended, they may
be mechanically retracted only. Do not attempt electrical
retraction as damage to the electric actuator will result. The
linkage in the nacelle area must be reset on the ground prior to
operation of the electric system.
a.
#1 and #2 ice vane switches (2) - EXTEND.
b.
#1 and #2 ice vane extended annunciator lights (2, green) - Check illuminated.
c.
Torquemeters - Monitor for a 7 to 16% drop in torque with ice vanes extended.
2-43
