Propeller Owner’s Manual
139
INTRODUCTION
61-00-39
Page 1-10
Rev. 17 Apr/20
8. Calendar Limits and Long Term Storage
(Rev. 1)
A. Calendar Limits
(1) The effects of exposure to the environment over a period
of time create a need for propeller overhaul regardless of
flight time.
(2) A calendar limit between overhauls is specified in
Hartzell Propeller Inc. Service Letter HC-SL-61-61Y and
in the propeller owner’s manual.
(3) Experience has shown that special care, such as
keeping an aircraft in a hangar, is not sufficient to permit
extension of the calendar limit.
(4) The start date for the calendar limit is when the propeller
is first installed on an engine.
(5) The calendar limit is not interrupted by subsequent
removal and/or storage.
(6) The start date for the calendar limit must not be
confused with the warranty start date, that is with certain
exceptions, the date of installation by the first retail
customer.
B. Long Term Storage
(1) Propellers that have been in storage have additional
inspection requirements before installation. Refer to the
Packaging and Storage chapter of Hartzell Propeller Inc.
Standard Practices Manual 202A (61-01-02).
