INSPECTION AND CHECK
61-00-39
Page 5-20
Rev. 17 Apr/20
Propeller Owner’s Manual
139
(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, blade
clamps, and blades to locate the source of the
grease leak.
1 If the source of the grease leak is a non-critical
part such as an O-ring, gasket, or sealant,
repairs can be accomplished during scheduled
maintenance as long as flight safety is not
compromised.
2 If cracks are suspected, additional inspections
to verify the condition must be performed before
further flight.
a Inspections typically include disassembly of
the propeller followed by inspection of parts,
using nondestructive methods in accordance
with published procedures.
(1) These inspections must be performed
by a certified propeller repair station with
the appropriate rating.
(c) If cracks or failing components are found, these
parts must be replaced before further flight.
1 Report such occurrences to the appropriate
airworthiness authorities and to Hartzell
Propeller Inc. Product Support.
