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.
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Change 23 16-15
