EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued)

EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK

EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued) - TM-55-1520-240-T-3_846

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 10. Check FWD HOOK OPEN, MID HOOK If FWD HOOK OPEN capsule (11) is lit, go to task OPEN, AFT HOOK OPEN, and DUAL 16-1.11. If MID HOOK OPEN capsule (12) is lit, HOOK FAULT capsules (11, 12, 13, and go to task 16-1.12. If AFT HOOK OPEN capsule 14). (13) is lit. go to task 16-1.13. If DUAL HOOK FAULT capsule (14) is lit, go to task 16-1.14. 11. Check center cargo hook gage (15). Gage shall indicate at least 2100 psi If it does not, service center cargo hook actuator (TM 55- WARNING 1520-240-23). If gage indication is below 2100 psi, inadvertent cargo hook operation could occur resulting in loss of external load. Injury or death can occur to personnel. 12. Press down on hook (16) on center cargo Hook (1 6) on center cargo hook shall not move to hook. Use wood plank. open position. If it does, replace center cargo hook. WARNING If a status light is on, it indicates that a first failure has occurred in one of the redundant protective circuits. A second failure while the system is in this condition can result in loss of external loads, resulting in personnel injury or death. 13. Check ARMED SW FAIL status light Light (17) shall be out. If it is on, replace HOIST/ (17). CARGO HOOK panel. 14. Press and release ARMED SW FAIL, Lights (17, 18 and 19) shall come on when RELEASE SW FAIL, and GROUND pressed and go out when released. If any light RE LAY ACTIVATE lights (17, 18 and does not come on. go to task 16-1.15. 19). GO TO NEXT PAGE Change 10 16-11

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