TM 1-1520-238-23
1-283
1.89.
HOISTING – MAIN ROTOR SUPPORT (STATIC) MAST REMOVAL – continued
NOTE
Use tag line to control mast.
c. Attach tag line to mast.
(1) Tie 20-foot line to bottom center of mast.
d. Lift mast from support base after removing
mast mounting nuts and washers.
(1) Crank winch (6) to hoist mast (7) above upper
fairing (8).
e. Position mast (7) over unloading surface.
(1) Rotate handle (3) to up position to allow later-
al movement of boom arm (4).
(2) Use two tag lines (5) to move boom arm (4).
(3) Turn arm (4) to aline mast (7) over level sur-
face.
(4) Rotate handle (3) to down position to prevent
lateral movement of boom arm (4).
f. Lower mast (7) to unloading surface.
(1) Crank winch (6) down and slowly lower mast
(7) to level surface.
g. Release tension on lifting cable when static
mast is secure.
(1) Crank winch (6) down to position hook (1)
below eye (2).
h. Remove hook (1) from eye (2).
(1) Unsnap hook (1) from eye (2).
i. Retract crane hook (1).
(1) Crank winch (6) up to position hook (1) about
6 inches below boom sheave (9).
END OF TASK
8
M04-2246-2
4
5
7
2
1
9
3
6
