Propeller Owner’s Manual
139
MAINTENANCE PRACTICES
61-00-39
Page 6-25
Rev. 17 Apr/20
B. Inspection Procedures Before Balancing
(1) Visually inspect the propeller assembly before dynamic
balancing.
NOTE
: The first run-up of a new or overhauled
propeller assembly may leave a small amount
of grease on the blades and inner surface of
the spinner dome.
(a) Use a Stoddard solvent (or equivalent) to completely
remove any grease on the blades or inner surface of
the spinner dome.
(b) Visually check each propeller blade assembly for
evidence of grease leakage.
(c) Visually inspect 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.
C. Modifying Spinner Bulkhead to Accommodate Dynamic
Balance Weights
CAUTION:
ALL HOLE/BALANCE WEIGHT
LOCATIONS MUST TAKE INTO
CONSIDERATION, AND MUST AVOID, ANY
POSSIBILITY OF INTERFERING WITH
THE ADJACENT AIRFRAME, DE-ICE AND
ENGINE COMPONENTS.
(1) It is recommended that the placement of balance
weights be in a radial location on 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 to attach the spinner
dome.
(3) Twelve equally spaced locations are recommended for
weight attachment.