Maintenance Practices
61-00-40
Page 6-19
Rev. 2 Jun/12
Propeller Owner's Manual
140
C. Placement of Balance Weights for Dynamic Balance
The preferred method of attachment of dynamic balance
weights is to add the weights to the spinner bulkhead;
however, some propeller models covered in this manual
do not have a spinner. Dynamic balance must then be
accomplished through the removal or addition and/or the
relocation of the static balance weights located on the blade
clamps.
NOTE: Chadwick-Helmuth Manual AW-9511-2, “The
Smooth Propeller”, specifies several generic
bulkhead rework procedures. These are
acceptable, providing they comply with the
conditions specified herein.
(1) Each blade clamp has four balance weight locations on
the outboard circular surface of the clamp (Figure 6-5).
(2) The maximum number of balance weights per location is
four (4).
CAUTION 1: BEFORE DYNAMIC BALANCE, RECORD
THE NUMBER AND LOCATION OF ALL
STATIC BALANCE WEIGHTS.
CAUTION 2: USE ONLY STEEL BALANCE WEIGHTS
A-48.
CAUTION 3: DO NOT EXCEED THE MAXIMUM
NUMBER OF BALANCE WEIGHTS PER
LOCATION.
(3) Alter the number and/or location of static balance
weights as necessary to achieve dynamic balance.
(4) Install weights using aircraft quality #10-32 or AN-3( )
type screws or bolts.
(5) When dynamic balancing is accomplished, it is
recommended that Warning Decal Part No. A-2803
(Figure 6-5) be installed on the propeller.
NOTE: This will alert repair station personnel that the
existing balance weight configuration may not
be correct for static balance.
(6) Record the number and location of dynamic balance
weights and static balance weights, if they have been
reconfigured, in the logbook.
Summary of Contents for HC-D2MV20-3 Series
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