Install Forward Fuselage Tiedown Fittings.

TM 55-1520-238-S

d. Main Rotor Drive Plate Cover.

d. Preservation. Thoroughly coat blade

Cover main rotor drive plate cover with bar-

root fitting bolt holes with corrosion preven-

rier material (D1), secure with tape

tive compound (D4). Wrap each blade

(D13).

root area with barrier material (D1). Se-

cure with tape (D13).

e. Connection Closure. Cap or wrap dis-

e. Install Blades in Racks. Install blades in

connected deicing connectors with barrier

blade rack sets (items 1 and 2, table 21)

material (D1) secure with tape (D13).

(fig. NO TAG).

f. Preservation. Apply corrosion preven-

(1) Remove upper and intermediate racks

tive compound (D4) to all exposed sur-

from blade root and blade tip racks.

faces of ADS mast, distributor and stand

pipe.

(2) Install first blade in lower blade root and

lower blade tip racks.

g. Component Wrap. Wrap ADS mast, dis-

tributor, and stand pipe with barrier material

(3) Place intermediate racks on top of

(D1) and cushioning material (D5), se-

blade.

cure with tape (D13).

(4) Place second blade on intermediate

h. Stowage. Stow wrapped cushioned ADS

racks with blade root of second blade

mast, distributor, and stand pipe in catwalk

inset approximately six inches from

area.

first blade root.

i. Install Panel.

Install panel R200.

(5) Install upper racks on blade root and

blade tip racks.

232.4 Install Forward Fuselage Tiedown Fittings.

(6) Repeat steps NO TAG thru NO TAG

for third and forth blades.

NOTE

f. Remove Wedges. Remove droop stop

Landing gear cross tube end studs have

wedges for use on next helicopter to be

nuts at both ends. One cotter pin and nut

prepared.

will be removed from each stud, and stud

will be pulled in direction allowing clear

232.2 Position Drive Train. After removal of main ro-

removal.

tor blades, position the drive train so that the main rotor

pitch housings are positioned 45 to the centerline of the

a. Remove Main Landing Gear Cross Tube

fuselage and the tail rotor blades are ``X ed'' horizontally

End Caps. Remove one cotter pin, nut,

and secured as shown in figure 234. Use rope, D28.

and washer from cross tube left and right

end cap studs. Pull studs (with pinned nuts

232.3 Remove Main Rotor Deice Power Distribu-

in place) from cross tube. Slide caps from

tor, Air Data System (ADS) Mast, and Stand Pipe.

cross tube ends. Retain removed studs,

a. Remove Panel. Remove panel R200.

washers, and nuts. Discard removed cotter

pins (fig. NO TAG).

NOTE

CAUTION

If installed angle of cross tube stud pre-

vents stud removal, helicopter must be

To prevent contamination of main ro-

jacked or lifted and cross tube rotated

tor drive shaft and stand pipe, cover

(TM 1-1520-238-23).

drive plate cover as soon as sensor

housing unit and stand pipe are re-

b. Install Tiedown Fittings. Slide tiedown

moved.

fittings (item 6, table 21) into left and right

ends of each main landing gear cross tube.

b. Component Removal. Remove main

Aline holes in fittings and cross tube, and

rotor deice power distributor, air data sys-

install removed studs, washers, and nuts.

tem mast, and stand pipe (fig. NO TAG and

TM 1-1520-238-23).

c. Stow Removed Cross Tube End

Caps. Wrap end caps with cushioning

c. Secure Cables. Reinstall (for stowage)

material (D5), secured with tape (D13).

removed wire guides and cable clamps.

Stow wrapped end caps on floor of pilots

Secure cables to deicing housing with twine

station.

(D14).

Change 4

281