Hartzell HC-C2YR-4CF/FC8475-6, Руководство пользователя и журнал учета

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MAINTENANCE PRACTICES
61-00-15
Page 6-40
Rev. 24 Dec/20
Propeller Owner's Manual
115N
(5) Static balance is accomplished at a propeller overhaul
facility 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 dynamic
balance may be unachievable because of
measurement equipment limitations.
C. Modifying Spinner Bulkhead to Accommodate Dynamic
Balance Weights
CAUTION 1: ALL HOLE/BALANCE WEIGHT
LOCATIONS MUST TAKE INTO
CONSIDERATION, AND MUST AVOID,
ANY POSSIBILITY OF INTERFERING
WITH PROPELLER COMPONENTS, THE
ADJACENT AIRFRAME, PROPELLER
ICE PROTECTION SYSTEM, AND
ENGINE COMPONENTS.
CAUTION 2: DO NOT MODIFY A COMPOSITE
SPINNER BULKHEAD TO
ACCOMMODATE DYNAMIC BALANCE
WEIGHTS.
(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 surface to attach the
spinner dome.
(3) Twelve equally spaced locations are recommended for
weight attachment.
(4) Installing nut plates (10-32 thread) of the type used to
attach the spinner dome will permit convenient balance
weight attachment on the engine side of the bulkhead.
(5) Alternatively, drilling holes for use with the AN3-( ) type
bolts with self-locking nuts is permitted.
(6) Chadwick-Helmuth Manual AW-9511-2, “The Smooth
Propeller”, specifies several generic bulkhead repair
procedures. These are permitted if they comply with the
conditions specified herein.