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Page Title:
Perform Preservation Procedures. |
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 TM 55-1520-238-S
n. Secure Tail Rotor Drive Shaft to Aft
Stowing Fixture. Use fixture forward
CAUTION
brace hookandpile strap.
Sling will be tensioned at this point
o. Connect Pivoting Base Frame to Aft Fix-
only enough to remove strap slack.
ture. Aline stowing kit pivoting base
Hoistloading the installed vertical
frame and aft fixture pivot lugs. Install the
stabilizer will cause major structural
two pivot quickrelease pins.
damage.
i. Couple Sling to Crane. Connect crane
p. Install Vertical Stabilizer on Pivoting
lifting hook to stabilizer sling lifting eye.
Base Frame. Mount vertical stabilizer on
Carefully operate crane winch to remove all
base frame. Use the four captive bolts at-
slack from sling straps.
tached to the base frame. Torque four cap-
tive bolts to 8 footpounds (96inch
pounds).
CAUTION
q. Aline Tail Rotor. Position tail rotor blades
Do not allow vertical stabilizer to swing
as shown. Secure intermediate gearbox
forward after removal of mounting
drive flange to fixture drive flange bracket.
bolts. Tail rotor drive shaft or horizon-
Use five removed fan coupling bolts.
tal pushrod may be damaged by stabi-
lizer forward movement.
NOTE
NOTE
Vertical stabilizer will be removed as a unit
Prior to removal of tail rotor blades ensure
with gearbox and tailrotor installed.
that they are properly color coded and
marked with the helicopter tail number.
j. Remove Vertical Stabilizer Mounting
The two removed blades will be in the low-
Bolts. Remove four bolts and washers
er position when stabilizer is down and
from stabilizer base mounting lugs. Retain
stowed (fig. 222).
the four bolts and washers.
k. Hoist Vertical Stabilizer. Swing vertical,
r. Remove Two Forward Tail
Rotor
stabilizer directly aft to clear the tail rotor
Blades. TM 1-1520-238-23.
control horizontal pushrod. Hoist stabilizer
(1) Install pitch link bolt, nut, and washers
just above and to the left of helicopter tail-
in pitch horn.
boom.
(2) Install tail rotor blade bolt and nut in tail
l. Perform Preservation Procedures.
rotor blade.
(1) Cap all disconnected fittings and con-
nectors.
(3) Cap or wrap deicing connectors with
(2) Apply corrosion preventive compound
barrier material (D1) sealed with tape
(D4) to stabilizer mounting surfaces,
(D13).
pivot fittings and bolt holes.
(4) Coat bare metal of tail rotor hub sur-
(3) Pad disconnected intermediate gear-
faces with corrosion preventive com-
box fan input coupling with barrier ma-
pound (D4).
terial (D1) sealed with tape (D13).
(5) Wrap disconnected pitch links with
(4) Bag removed hardware and place in
cushioning material (D5) sealed with
pilots station.
tape (D13) and secure wrapped links
m. Install Aft Stowing Fixture. Use stowing
to tail rotor hub with tape (D13).
kit (item 55, table 22). Mount stowing kit aft
(6) Wrap each tail rotor blade hub fitting
fixture on helicopter tailboom, with fixture
area with barrier material (D1) sealed
forward brace alined under the discon-
with tape (D13).
nected drive shaft. Use the four removed
stabilizer mounting bolts and washers.
(7) Install two tail rotor blades in blade sup-
Torque four mounting bolts to 90 foot
pounds (1080 inchpounds).
secure with tie down strap.
262
Change 1
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