Propeller Owner’s Manual
139
INTRODUCTION
61-00-39
Page 1-12
Rev. 17 Apr/20
(5) Blades and hubs are sometimes replaced while in
service or at overhaul.
(a) Maintaining separate TSN and TSO histories for a
replacement hub or blade is required.
(b) Hub replacement
1 If the hub is replaced, the replacement hub serial
number must be recorded (the entry signed and
dated) in the propeller logbook.
2
The propeller will be identified with the serial
number of the replacement hub.
NOTE: Propeller assembly serial numbers
are impression stamped on the hub.
For stamping information, refer to
the Parts Identification and Marking
chapter of Hartzell Propeller Inc.
Standard Practices Manual 202A
(61-01-02).
3 The TSN and TSO of the replacement hub must
be recorded and maintained in the propeller
logbook.
4 If tracking any component(s) other than the
hub/blades, maintain these TSN/TSO records
separately in the propeller logbook.
NOTE: Hub replacement does not affect
the TSN/TSO of any other propeller
components.
B. Overhaul
(1) Overhaul is the periodic disassembly, cleaning,
inspecting, repairing as necessary, reassembling, and
testing in accordance with approved standards and
technical data approved by Hartzell Propeller Inc.
(2) The overhaul interval is based on hours of service,
i.e., flight time, or on calendar time.
(a) Overhaul intervals are specified in the applicable
Hartzell Propeller Inc. propeller owner’s manual and
Hartzell Service Letter HC-SL-61-61Y.
