TM 1-1520-240-104-3-234-3-20. HICHS Cargo Types.The HICHS allows relatively quick and easy loading ofpalletized 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 48inches.The HICHS has provisions for locking and securing 463Lpallets. This type of pallet does not need to be tied down, butthe cargo must be secured to the pallet. Combinations ofdifferent pallet types may be used. Miscellaneous cargo andequipment may be carried providing that they do not exceedweight or floor loading restrictions, and can be properly tieddown.4-3-21. System Configuration.The HICHS can be placed in any of four configurations.These are loading, restraint, flight and unloading. Refer toChapter 6 for configurations applicable to 463L pallets,warehouse pallets, and wheeled vehicles.To accomplish the configuration described above and in thereferenced tables, several components must be set in apredetermined position. These components are listed belowin conjunction with the illustration that defines the compo-nent 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 377.250to at least sta 157.750.Remove three centerline ring plug assemblies to free theforward hatch inboard guide roller assembly (fig. 4-3-17).Stow the removed parts ahead of sta 272.250. The hatchis 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 securethe seat support tube as shown in fig. 4-3-16. Secureloading pole to clips located at the top of the buffer boardbetween sta 300 and 400 on right side of helicopter withquick release pin. Inboard guide roller assemblies can bestowed on the floor beneath the troop seats. Secureramp extension rollers to the underside of the ramp ex-tensions with quick release pins. Stow ramp extensionsupports on the left side of the helicopter in bracketsmounted between sta 520 and 534. Stow ramp supportat sta 550 left side.4-3-24. Load Configuration and Sequence.Chapter 6 contains the detailed descriptions and proce-dures for load configuration and sequence.
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