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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.
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

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