Propeller Owner’s Manual
136
INSPECTION AND CHECK
61-00-36
Page 5-13
Rev. 2 Feb/17
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 for cracks in the hub.
1 A crack may be readily visible, or may be indicated
by grease leaking from a seemingly solid surface.
Extra attention should be given to the blade retention
area of the hub.
(c) Perform a visual inspection of the hub and blade retention
areas to locate the origin of leakage.
1 If the origin of grease leakage is determined to be a
noncritical part such as an O-ring or sealant, repairs
can be accomplished during scheduled maintenance,
as long as flight safety is not compromised.
(d) If cracks are suspected, additional inspections must be
performed before further flight.
1 These inspections must be
performed by qualified personnel at a certified
propeller repair station with the appropriate rating to
verify the condition. Such inspections typically include
disassembly of the propeller followed by inspection of
parts, using nondestructive methods in accordance
with published procedures.
(e) If cracks or failing components are found, parts must be
replaced before further flight.
1 Report such incidents to the appropriate
airworthiness authorities and Hartzell Propeller Inc.
Product Support.