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P.   Cargo Hook Operational Check
Q.  TRACKING AND BALANCING PROCEDURES

TM-1-1520-240-MTF Army Model CH-47D Heilcopter (EIC:RCD) Manual
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TM 1-1520-240-MTF 4-36 NOTE The forward and aft cargo hooks will not open un- less a force is applied. As long as one the CARGO HOOK Release switches are pressed, the forward and aft hooks will make a chattering sound. This sound indicates the hook solenoids are operating normally. 4.  CARGO HOOK SEL switch — MID. 5.  Press the CARGO HOOK Release switch on the copilot’s cyclic stick. Check that the MID HOOK OPEN caution capsule comes on and the hook opens. 6.  CARGO HOOK SEL switch — AFT. 7.  CARGO HOOK switch on HOIST OPERATORS PANEL — ARM. 8.  Press the CARGO HOOK Release switch on the WINCH/HOIST CONTROL GRIP — Check that the AFT HOOK OPEN caution capsule comes on and the hook solenoid activates. RESET and release to OFF. 9.  CARGO  HOOK  MSTR  switch  —  RESET  and release to OFF. Check all HOOK OPEN caution capsules lights go out and the hooks ar close. Then set to ARM. 10.  CARGO HOOK SEL switch — TANDEM. 11.  Press the CARGO HOOK Release switch on the pilot’s cyclic stick. Check that the FWD and AFT HOOK OPEN caution capsules come on and the forward and aft solenoids activate. 12.  CARGO  HOOK  MSTR  switch  —  RESET  and release   to   OFF.   Check   both   HOOK   OPEN caution capsules go out and the hooks close. Then set to ARM. 13.  CARGO HOOK SEL switch — ALL.







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