Propeller Owner's Manual
115N
TESTING AND TROUBLESHOOTING
61-00-15
Page 4-9
Rev. 24 Dec/20
E. Failure to Feather (or feathers slowly) (-2 or -5 propellers
only)
(1) Air charge lost or low. Refer to the section, "Air Charge"
in the Maintenance Practices chapter of this manual.
(2) Broken feathering spring (if applicable).
(3) Check for proper function and rigging of
propeller/governor control linkage.
(4) Check the governor function.
(5) The propeller must be inpsected for misadjustment or
internal corrosion (usually in blade bearings or pitch
change mechanism) that results in excessive friction.
(a) This inspection must be performed
by a certified
propeller repair station with the appropriate rating.
F. Failure to Unfeather (-2 or -5 propellers only)
(1) Check for proper function and rigging of propeller control
linkage.
(2) Perform a check of the governor function, including the
unfeathering accumulator, if applicable.
(3) Check for excessive oil leakage at engine transfer
bearing (-2 propellers only).
(4) The propeller must be inspected for misadjustment or
internal corrosion (usually in blade bearings or pitch
change mechanism) that results in excessive friction.
(a) This inspection must be accomplished
by a certified
propeller repair station with the appropriate rating.