TM 55-1520-240-T16-1.4 EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued)16-1.4TASKRESULT40. Suspend 20-25 pound load from load beam (23) onaft cargo hook.41Set HOOK SELECT switch (2) to TANDEM.42. Press and release pilot’s CARGO HOOK RELEASEForward and aft cargo hooks shall open and drop loadswitch (21).then relatch closed. FWD HOOK OPEN and AFT HOOKOPEN capsules (11 and 13) shall come on. Pilot andcopilot’s master caution lights (24) shall come on. If bothhooks do not open, replace HOIST/CARGO HOOK panel.43. Set CARGO HOOK switch (4) to RESET and then toForward and aft cargo hooks shall stay closed. FWDRMTE.HOOK OPEN and AFT HOOK OPEN capsules (11 and13 shall go out. If capsules are still on, replace CARGOHOOK switch (4).44. Suspend one 20-25 pound load from each load beam(23) on forward and aft cargo hooks.45. Set HOOK SELECT switch (2) to ALL.46. Press and release pilot’s CARGO HOOK RELEASEForward and aft cargo hooks shall open and drop loadsswitch (21).then relatch closed. Center cargo hook shall open andNotestay open. FWD HOOK OPEN, MID HOOK OPEN, andIt is normal for MID HOOK OPEN capsule to comeAFT HOOK OPEN capsules (11, 12 and 13) shall comeon at 2to3seconds after FWD HOOK OPEN andon. Pilot and copilot master caution lights (24) shall comeAFT HOOK OPEN capsules come on.on. If all hooks do not open, replace HOIST/CARGOHOOK panel.GO TO NEXT PAGEChange 23 16-15
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