TM 55-1520-240-T16-1.4 EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued)16-1.4TASKRESULT15. Disconnect forward cargo hook connector (20). DUAL HOOK FAULT capsule (14) shall come on. If it doesnot, go to Task 16-1.16.16. Set MASTER switch (1) to ARM. ARMED SW FAIL light (17) shall come on. If it does not,go to Task 16-1.17.17. Press and release pilot's CARGO HOOK RELEASERELEASE SW FAIL light (18) shall momentarily come on.switch (21).GROUND RELAY ACTIVATE light (19) shall come on andstay on. If either or both lights do not come on, go to Task16-1.18.18. Set MASTER switch (1) to OFF and then back to ARM.ARMED SW FAIL light (17) shall go out and come backon. GROUND RELAY ACTIVATE light (19) shall go out. Ifboth lights stay on, replace HOIST/CARGO HOOK Panel.19. Press and release CARGO HOOK RELEASE switchRELEASE SW FAIL light (18) shall momentarily come on.(21) on copilot's pitch and roll control grip.GROUND RELAY ACTIVATE light (19) shall come onand stay on. If either light does not come on, go to Task16-1.19.20. Repeat step 18, then go to step 21.21. Press and release CARGO HOOK RELEASE switchRELEASE SW FAIL light (18) and GROUND RELAY(22).ACTIVATE light (19) shall stay out. If either light comeson, replace CARGO HOOK switch (4).22. Set CARGO HOOK switch (4) to ARM.23. Press and release CARGO HOOK RELEASE switchRELEASE SW FAIL light (18) shall momentarily come on.(22).GROUND RELAY ACTIVATE light (19) shall come on andstay on. If either light does not come on, go to Task16-1.20.24. Set CARGO HOOK switch (4) to RESET then toGROUND RELAY ACTIVATE light (19) shall go out. If itRMTE.does not, replace CARGO HOOK switch (4).GO TO NEXT PAGE16-12 Change 23
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