Cargo Hook (Helicopter) 2
Cargo Hook (Helicopter) 2 : Hook Types: (1) Primary Hooks: A Eurocopter AS350 helicopter with a belly hook installed. This configuration is called a swing or suspension system mount because the actual cargo hook drops down from inside a swing frame that is suspended from the fuselage by four cables. Primary, or "belly" hooks, are designed to mount directly to the airframe belly, i. e. underside, of a helicopter. Because they are attached to the fuselage, or "skin," of the aircraft, belly hooks are regulated by the various worldwide aviation regulatory agencies. In the United States, belly hooks are governed under Federal Aviation Administration (FAA) FAR Part 133. Belly hooks are designed, manufactured, and approved for use on specific aircraft models. Belly hooks that have been certified by the FAA receive a Supplemental Type Certificate (STC) that describes the aircraft models that are authorized to use the hook for external load operations. For example, a belly hook approved for use by the FAA on a Eurocopter AS350 could not be used on a Bell 407 helicopter unless covered by the STC. For small to mid-size utility helicopters performing external load work, belly hooks are typically mounted to the fuselage using either a sling, or a suspension configuration. The sling mount uses a single attach point, whereas a suspension system uses four attach points. Since suspension systems transfer the weight of the cargo load across a larger swath of the aircraft, they can carry heavier loads than sling mounts
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