Propeller Owner’s Manual
147
INSPECTION AND CHECK
61-00-47
Page 5-21
Rev. 17 Sep/20
3 Leaks from the front of the cylinder or through
the start lock units
a Faulty seal(s) between the piston and
cylinder, or piston and pitch change rod
(1
) Refer to a certified propeller repair
station with the appropriate rating
for seal replacement.
4 Leaks between the hub and the engine
a Faulty or missing seal between the propeller
hub and the engine flange
(2) Inspection Procedure
(a) Remove the spinner dome.
CAUTION:
PERFORM A VISUAL INSPECTION
WITHOUT CLEANING THE PARTS. A
TIGHT CRACK IS OFTEN EVIDENT
DUE TO TRACES OF GREASE
EMANATING FROM THE CRACK.
CLEANING CAN REMOVE SUCH
EVIDENCE AND MAKE A CRACK
VIRTUALLY IMPOSSIBLE TO SEE.
(b) Perform a visual inspection of the hub, blades, and
blade retention areas to locate the source of the
grease leak.
1 If the source of the grease leak is a lubrication
fitting, blade O-ring, or the hub parting line,
repairs can be accomplished during scheduled
maintenance as long as flight safety is not
compromised.
a To repair a grease leak from a lubrication
fitting, blade O-ring, or hub parting line,
the propeller must be disassembled and
inspected at a certified propeller repair
station with the appropriate rating.
2 If the source of the grease leak is a component
or location other than a lubrication fitting, blade
O-ring, or the hub parting line, the propeller must
be disassembled and inspected at a certified
propeller repair station with the appropriate
rating before further flight.
