CSP−HMI−2
MD Helicopters, Inc
.
MAINTENANCE MANUAL
Page 206
Revision 23
18−20−00
BALANCE WASHERS
(NOTE 1)
SHIMS
(NOTE 2)
SHIM
NOTES:
1. MAXIMUM ALLOWABLE NUMBER OF WASHERS AT
PITCH ARM BOLT IS 23. WHENEVER THIS LIMIT IS
REACHED AND REQUIRED BALANCE CANNOT BE
MET, SHIFT THE CENTER OF THE HUB BY
TRANSFERRING SHIMS, THICKNESS OF 0.010 IN.
(0.254 MM), FROM WEIGHTED PITCH ARM SIDE TO
THE OPPOSITE SIDE AS SHOWN AND RE−CHECK
BALANCE, STARTING FROM ZERO WASHERS.
2. REMOVE 0.010 IN. (0.254 MM) THICK SHIM FROM
PITCH ARM SIDES AND TRANSFER THE SHIM TO
THE OPPOSITE SIDE.
G18−2002A
Figure 203. Long Method Tail Rotor Balancing (Inboard Blade)
BALANCE WASHERS
(MAX. 23)
SHIMS
(NOTE 2)
SHIM
G18−2003A
NOTES:
1. REMOVE 0.010 IN. (0.254 MM) THICK SHIM
FROM WEIGHTED PITCH ARM SIDE AND
TRANSFER THE SHIM TO THE OPPOSITE SIDE.
2. DURING BALANCE OF OUTBOARD BLADES,
WEIGHTS ON INBOARD BLADES MUST NOT
BE CHANGED.
Figure 204. Long Method Tail Rotor Balancing (Outboard Blade)
