16-1.4 EXTERNAL CARGO HOOK SYSTEM OPERATIONAL CHECK (Continued)
Remove dial indicating scale. Manually
relatch center cargo hook (TM 55-1520-
Press down on hook (16) of center cargo
hook. Use wood plank.
Swing center cargo hook
block (26) contacts beam
right until pivot
(27) and pull on
Repeat step 56 to the left. Then go to step
Without pull tandem hook release lev-
er (28) aft then to vertical position.
Push lever (28) forward to stowed posi-
When manual release has been
pulled, do not press any CARGO
HOOK RELEASE switch or EMERG
switch. Damage to cargo hook
With suspend a weight of 20-25
pounds from the forward and aft cargo
hooks (23). Suspend a weight of 45 to 50
pounds from the center cargo hook (16).
Pull the triple hook manual release lever
aft then back to the vertical position.
Push lever (28.1) forward to stowed posi-
MID HOOK OPEN capsule (12) and both master cau-
tion lights (24) shall go out.
Center cargo hook shall not open. If it does, manual-
ly relatch center cargo hook (TM 55-1520-240-23),
and repeat step 55. If hook opens again, replace
center cargo hook.
Center cargo hook shall not open. If it does, check
rigging of manual release mechanism (TM 55-1520-
240-23). Repeat step 56.
Forward and aft cargo hooks shall open and latch
closed. FWD HOOK OPEN and AFT HOOK OPEN
capsules (11 and 13) and master caution lights (24)
shall come on. If either or both hooks do not open,
go to task 16-1.29.
The forward, center, and aft cargo hooks shall open
and drop loads. The forward and aft hook shall latch
closed. FWD HOOK OPEN, MID HOOK OPEN, and
AFT HOOK OPEN capsules (11, 12, and 13) and
MASTER CAUTION lights (24) shall come on. If a
cargo hook (or hooks) fails to open, go to task 16-
GO TO NEXT PAGE