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

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MAINTENANCE PRACTICES
61-00-15
Page 6-41
Rev. 24 Dec/20
Propeller Owner's Manual
115N
D. Placement of Balance Weights for Dynamic Balance
CAUTION: 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.
(1) The preferred method of attachment of dynamic balance
weights is to add the weights to the spinner bulkhead.
NOTE: Many spinner bulkheads have factory installed
self-locking nut plates provided for this purpose.
(2) If the location of static balance weights has not been
altered, subsequent removal of the dynamic balance
weights will return the propeller to its original static
balance condition.
(3) Use only stainless or plated steel washers as dynamic
balance weights on the spinner bulkhead.
(4) A maximum of six AN970 style washers weighing up to
approximately 1.0 oz (28.0 g) may be installed at any
one location.
NOTE: The dimensions of an AN970 washer are:
ID 0.203 inch (5.16 mm), OD 0.875 inch
(22.23 mm), and thickness 0.063 inch
(1.59 mm).
(5) Install weights using aircraft quality #10-32 or AN-3( ) type
screws or bolts.
(6) Balance weight screws attached to the spinner bulkhead
must protrude through the self-locking nuts or nut plates a
minimum of one thread and a maximum of four threads.
(a) It may be necessary to alter the number and/or
location of static balance weights to achieve dynamic
balance.