Propeller Owner’s Manual
147
MAINTENANCE PRACTICES
61-00-47
Page 6-26
Rev. 16 May/20
(b) Visually examine each propeller blade assembly for
evidence of grease leakage.
(c) Visually examine the inner surface of the spinner
dome for evidence of grease leakage.
(2) If there is no evidence of grease leakage, lubricate the
propeller in accordance with the Maintenance Practices
chapter in this manual. If grease leakage is evident,
determine the location of the leak and correct before re-
lubricating the propeller and dynamic balancing.
(3) Before dynamic balancing, record the number and
location of all balance weights.
(4) Static balance is accomplished at an appropriately rated
propeller repair station that is certified by the Federal
Aviation Administration (FAA) or international equivalent
when an overhaul or major repair is performed.
NOTE: If static balancing is not accomplished before
dynamic balancing, the propeller may be so
severely unbalanced that it may not be
possible to achieve dynamic balance.
C. Modifying Spinner Bulkhead to Accommodate Dynamic
Balance Weights
CAUTION 1: DO NOT MODIFY A COMPOSITE SPINNER
BULKHEAD TO ACCOMMODATE
DYNAMIC BALANCE WEIGHTS.
CAUTION 2: ALL HOLE/BALANCE WEIGHT
LOCATIONS MUST TAKE INTO
CONSIDERATION AND MUST AVOID,
ANY POSSIBILITY OF INTERFERING
WITH THE ADJACENT AIRFRAME, ICE
PROTECTION SYSTEM, AND ENGINE
COMPONENTS.
(1) It is recommended that the placement of balance weights
be in a radial location on the aluminum spinner
bulkheads that have not been previously drilled.
(2) The radial location should be outboard of the de-ice slip
ring or bulkhead doubler and inboard of the bend where
the bulkhead creates the flange surface to attach the
spinner dome.
