Tiedown Helicopter.

TM 55-1520-238-S

l. (Logistical Shipment Only) Install Verti-

f. Install Helicopter Guide Ropes. Tie two

cal Stabilizer Support. Install sixinch

20foot lengths of 1/2inch diameter rope

by eightinch wood shoring under support

to tail landing gear arms.

stand to obtain required height.

CAUTION

m. Lower Helicopter Onto Trailer Plat-

form. With an assistant holding fuselage

Helicopter must be hoisted high

support under helicopter fuselage station

enough to allow landing gear wheels to

450 (tailboom) jacking pad, slowly lower

clear trailer platform. Insufficient heli-

helicopter onto trailer platform. Use guide

coptertotrailer clearance will result

ropes to maintain proper fuselage aline-

in serious component damage when

ment. If adjustment of foreandaft posi-

trailer is backed.

tioning is required, operate crane winch to

g. Hoist Helicopter. Operate crane winch

raise helicopter, carefully move truck for-

and hoist helicopter higher than trailer plat-

ward or aft, use guide ropes to maintain

form.

proper alinement, and lower helicopter into

place.

CAUTION

n. Shoring and Chocks. Install wheel

chocks (4inch, 45 degree) forward and aft

When first backing trailer for loading,

of both main landing gear wheels. Nail

allow at least 6 feet clearance for safe

chocks to 2inch x 12inch wheel shoring.

maneuver between rear of tractor cab

Nail 2inch x 12inch shoring for MLG

and tail of helicopter. Further adjust-

wheels to trailer platform. Nail 6inch x

ment of helicopter position will be

8inch shoring together for FS 450 support

made by careful control of crane winch

and vertical stabilizer jack adapter and nail

and trailer position, and handcontrol

shoring to trailer platform. Secure FS 450

with guide ropes.

support and vertical stabilizer jack adapter

h. Back Trailer Under Helicopter. Careful-

to shoring with nails to prevent slippage.

ly back trailer under hoisted helicopter.

Aline trailer platform and helicopter center-

o. Lock Tail Wheel Swivel. Paragraph

lines, then set truck parking brakes.

214.6u.

i. Install Fuselage Support on Trailer Plat-

form. Position fuselage station 450 truck

418.3 Tiedown Helicopter.

support (item 50, table 41) on platform

centerline, 10 feet aft of trailer forward end.

CAUTION

Elevate FS 450 support by placing 4 pieces

of 6inch by 8inch wood shoring under FS

Tiedown restraints will be tensioned

450 support when using M270A1 trailer.

only enough to remove all free play.

Height of shoring will vary depending upon

Overtightened tie downs will dam-

commercial trailer configuration.

age helicopter structure.

For security of helicopter on trailer

j. Install Shoring Under Main Landing

platform, crane lifting hook, air ve-

Gear Wheels. Place 2inch by 12inch

hicle sling, and guide ropes will re-

wood shoring under main landing gear

main in place until completion of he-

wheels. Shoring will not cover trailer tie-

licopter tie down procedures.

down hole.

a. Tiedown

Forward

Fuselage

Fit-

k. Install Cushioning Material Under Nose

tings. Install two 25,000 pound tiedown

of Helicopter. Use cushioning material

devices/chains (items 60 and 61, table 41)

(D5) folded to a 3inch thickness and se-

at each of two forward tiedown fittings. Tie-

cured to trailer platform under nose/fuse-

down devices/chains will be connected

lage of helicopter. This is used as a safety

from forward tiedown fitting to nearest trail-

factor to prevent contact of trailer and heli-

copter.

er stake pocket (fig. 43, 44 or 45).

414

Change 1