TM 55-1520-240-T
16-1.4 EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued)
16-1.4
TASK
RESULT
15. Disconnect forward cargo hook connector (20).
DUAL HOOK FAULT capsule (14) shall come on. If it does
not, 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 RELEASE
RELEASE SW FAIL light (18) shall momentarily come on.
switch (21).
GROUND RELAY ACTIVATE light (19) shall come on and
stay on. If either or both lights do not come on, go to Task
16-1.18.
18. Set MASTER switch (1) to OFF and then back to ARM.
ARMED SW FAIL light (17) shall go out and come back
on. GROUND RELAY ACTIVATE light (19) shall go out. If
both lights stay on, replace HOIST/CARGO HOOK Panel.
19. Press and release CARGO HOOK RELEASE switch
RELEASE SW FAIL light (18) shall momentarily come on.
(21) on copilot's pitch and roll control grip.
GROUND RELAY ACTIVATE light (19) shall come on
and stay on. If either light does not come on, go to Task
16-1.19.
20. Repeat step 18, then go to step 21.
21. Press and release CARGO HOOK RELEASE switch
RELEASE SW FAIL light (18) and GROUND RELAY
(22).
ACTIVATE light (19) shall stay out. If either light comes
on, replace CARGO HOOK switch (4).
22. Set CARGO HOOK switch (4) to ARM.
23. Press and release CARGO HOOK RELEASE switch
RELEASE SW FAIL light (18) shall momentarily come on.
(22).
GROUND RELAY ACTIVATE light (19) shall come on and
stay on. If either light does not come on, go to Task
16-1.20.
24. Set CARGO HOOK switch (4) to RESET then to
GROUND RELAY ACTIVATE light (19) shall go out. If it
RMTE.
does not, replace CARGO HOOK switch (4).
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16-12 Change 23
