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EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-3_848
EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-3_850

TM-55-1520-240-T-3 CH-47D Heilcopter Manual
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TM 55-1520-240-T 16-1.4  EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued) 16-1.4 TASK RESULT 40.    Suspend 20-25 pound load from load beam (23) on aft cargo hook. 41 Set HOOK SELECT switch (2) to TANDEM. 42.    Press and release pilot’s CARGO HOOK RELEASE Forward and aft cargo hooks shall open and drop load switch (21). then relatch closed.  FWD HOOK OPEN and AFT HOOK OPEN capsules (11 and 13) shall come on.  Pilot and copilot’s master caution lights (24) shall come on.  If both hooks do not open, replace HOIST/CARGO HOOK panel. 43.    Set CARGO HOOK switch (4) to RESET and then to Forward and aft cargo hooks shall stay closed.  FWD RMTE. HOOK OPEN and AFT HOOK OPEN capsules (11 and 13 shall go out.  If capsules are still on, replace CARGO HOOK 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 RELEASE Forward and aft cargo hooks shall open and drop loads switch (21). then relatch closed.  Center cargo hook shall open and Note stay open.  FWD HOOK OPEN, MID HOOK OPEN, and It is normal for MID HOOK OPEN capsule to come AFT HOOK OPEN capsules (11, 12 and 13) shall come on at 2 to 3 seconds after FWD HOOK OPEN and on.  Pilot and copilot master caution lights (24) shall come AFT HOOK OPEN capsules come on. on.  If all hooks do not open, replace HOIST/CARGO HOOK panel. GO TO NEXT PAGE Change 23  16-15







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