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The system is equipped with a set of locking devices and
tiedown fittings for securing loaded cargo.
NOTE
All cargo must be properly restrained to ensure
safe operation of the helicopter and the
safety of personnel. Loads must be restrained
in accordance with procedures and guidelines
in Chapter 6 and TM 10-450-2, Helicopter
Internal Loads.
The ramp section has two inboard roller assemblies along
the center of the ramp and two outboard guide/roller assemblies
along the sides of the ramp. A ramp support assembly
is used to support the ramp when loading or unloading the
helicopter with the ramp in the horizontal position
The ramp extension section has two ramp extension roller
assemblies and two ramp extension support assemblies
to support the ramp extensions when loading and
unloading with the ramp in the horizontal position.
TM 1-1520-240-10
4-3-21
Figure 4-3-15. HICHS with 463L Palletized
TM 1-1520-240-10
4-3-22
Figure 4-3-16. Fixture Configuration
TM 1-1520-240-10
4-3-23
4-3-20. HICHS Cargo Types.
The HICHS allows relatively quick and easy loading of
palletized cargo. The following pallet types may be used:
a. Three 436L pallets, 88 x 108 inches.
b. Six HCU-12/E or HCU/C pallets, 54 x 88 inches.
c. Eight to ten warehouse wooden pallets, 40 x 48
inches.
The HICHS has provisions for locking and securing 463L
pallets. This type of pallet does not need to be tied down, but
the cargo must be secured to the pallet. Combinations of
different pallet types may be used. Miscellaneous cargo and
equipment may be carried providing that they do not exceed
weight or floor loading restrictions, and can be properly tied
down.
4-3-21. System Configuration.
The HICHS can be placed in any of four configurations.
These are loading, restraint, flight and unloading. Refer to
Chapter 6 for configurations applicable to 463L pallets,
warehouse pallets, and wheeled vehicles.
To accomplish the configuration described above and in the
referenced tables, several components must be set in a
predetermined position. These components are listed below
in conjunction with the illustration that defines the component
location or position.
a. Outboard rollers — fig. 4-3-16.
b. Warehouse pallet guides — fig. 4-3-16.
c. Ramp support assembly — fig. 4-3-16.
d. Pallet lock assembly — fig. 4-3-17.
e. Retractable flange assembly — fig. 4-3-15.
f. 10K fitting assemblies — fig. 4-3-18.
g. 5K fitting assemblies — fig. 4-3-18.
4-3-22. Hatch Access.
Remove, if necessary, any cargo forward of sta 377.250
to at least sta 157.750.
Remove three centerline ring plug assemblies to free the
forward hatch inboard guide roller assembly (fig. 4-3-17).
Stow the removed parts ahead of sta 272.250. The hatch
is now accessible and the removed parts can be re–
installed by reversing the proceeding steps.
4-3-23. System Stowage.
Flip-up the outboard rail/roller assemblies and secure
the seat support tube as shown in fig. 4-3-16. Secure
loading pole to clips located at the top of the buffer board
between sta 300 and 400 on right side of helicopter with
quick release pin. Inboard guide roller assemblies can be
stowed on the floor beneath the troop seats. Secure
ramp extension rollers to the underside of the ramp extensions
with quick release pins. Stow ramp extension
supports on the left side of the helicopter in brackets
mounted between sta 520 and 534. Stow ramp support
at sta 550 left side.
4-3-24. Load Configuration and Sequence.
Chapter 6 contains the detailed descriptions and procedures
for load configuration and sequence.
TM 1-1520-240-10
4-3-24
Figure 4-3-17. Internal Cargo Handling System
TM 1-1520-240-10
4-3-25/(4-3-26 blank)
Figure 4-3-18. Tiedown Fittings HICHS

TM 1-1520-240-10
4-4-1
SECTION IV. EXTENDED RANGE FUEL SYSTEM (ERFS) AND ERFS II
WARNING
The ERFS is a non-crashworthy auxiliary
fuel system. The use of a non-crashworthy
internal extended range fuel system may
compromise the helicopters crashworthiness
and may increase the risk of burns in
a potentially survivable accident.
4-4-1. Extended Range Fuel System
The ERFS provides mission flexibility as
an extended range mission kit and a forward
area refueling source. The ERFS is
mounted on the left side of the cabin between
sta 190 and 450, depending on the
helicopter CG limits. The ERFS is a modular,
interconnected system composed of
up to four 600 gal non-crashworthy metal
　
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