MAINTENANCE PRACTICES
61-00-36
Page 6-7
Rev. 2 Feb/17
Propeller Owner's Manual
136
2. Lubrication
CAUTION:
INSTRUCTIONS AND PROCEDURES IN
THIS SECTION MAY INVOLVE PROPELLER
CRITICAL PARTS. REFER TO THE
INTRODUCTION CHAPTER OF THIS
MANUAL FOR INFORMATION ABOUT
PROPELLER CRITICAL PARTS. REFER TO
THE ILLUSTRATED PARTS LIST CHAPTER
OF THE APPLICABLE OVERHAUL MANUAL(S)
FOR THE IDENTIFICATION OF SPECIFIC
PROPELLER CRITICAL PARTS.
A. Lubrication Intervals
(1) The propeller must be lubricated at intervals not to
exceed 100 hours or at 12 calendar months, whichever
occurs first.
(a) If annual operation is significantly less than 100
hours, calendar lubrication intervals should be
reduced to six months.
(b) If the aircraft is operated or stored under adverse
atmospheric conditions, e.g., high humidity, salt air,
calendar lubrication intervals should be reduced to
six months.
(2) Owners of high use aircraft may wish to extend their
lubrication interval. Lubrication interval may be gradually
extended after evaluation of previous propeller overhauls
with regard to bearing wear and internal corrosion.
(3) Hartzell Propeller Inc. recommends that new or newly
overhauled propellers be lubricated after the first one
or two hours of operation because centrifugal loads
will pack and redistribute grease, which may result in a
propeller imbalance. Redistribution of grease may also
result in voids in the blade bearing area where moisture
can collect.
(a) Purchasers of new aircraft should check the
propeller logbook to verify whether the propeller was
lubricated by the manufacturer during flight testing.
If it was not lubricated, the propeller should be
serviced at the earliest convenience.
