4-3-12. Manual Release System.
Depending on the mission requirement, the
manual release lever may be positioned in the
forward or stowed position.
The manual emergency release lever for all three cargo
hooks is located on the right side of the rescue hatch
door. The lever is connected by cables to the manual
release mechanism in each hook. The lever has three
positions; forward, vertical, and aft. In the forward posi-
tion the lever is stowed. In the vertical position the lever
is in the normal position when external cargo is carried
on any of the hooks. In the aft position the lever releases
all hooks simultaneously, loaded or not.
4-3-13. Cargo Hook Cautions.
The cargo hook caution capsules are on the master cau-
tion panel. They are labeled FWD HOOK OPEN, MID
HOOK OPEN, and AFT HOOK OPEN. A lit caution cap-
sule indicates that the corresponding hook has opened.
The cautions can be extinguished by setting the CARGO
HOOK MSTR switch to RESET or by setting the CARGO
HOOK switch on the hoist operators panel to RESET.
4-3-14. Hook Loaded Advisory Lights.
Two advisory lights marked HOOK LOADED are on the
CARGO HOOK control panel (fig 4-3-3). The lights are
marked HOOK LOADED. When on, the light indicates
that the corresponding (forward or aft) hook has a load
of above approximately 150 pounds on it. The lights are
turned on by sensors in the forward and aft hooks.
If the DUAL HOOK FAULT light indicates a
malfunction of the forward or aft hook, re-
leasing the load using other than the
manual release handle is prohibited.
4-3-15. Dual Hook Fault Caution.
A caution capsule labeled DUAL HOOK FAULT is on the
master caution panel. The light provides continuous
monitoring of the electrical continuity of the release sole-
noids in the forward and aft hook. When on, it indicates
a loss of electrical release capability of the forward and/or
aft hook in both normal and emergency modes. When the
capsule is on, loads on the forward or aft hooks can only
be released by the manual release system.
4-3-16. Cargo Hooks Operational Check.
When stowing or positioning the cargo
hook, do not grasp the hook assembly by
the synchronizing assembly shaft. Seri-
ous injury can result if the hook is oper-
ated while the hand is in this position. The
nylon web strap is to be used when posi-
tioning or stowing the hook.
Before external load operations, perform the following
check of the cargo hooks.
1. CARGO HOOK MSTR switch ARM.
2. CARGO HOOK SEL switch FWD.
3. Press the CARGO HOOK RELEASE switch
on the pilots cyclic stick Check that the
FWD HOOK OPEN caution capsule comes
on and the hook opens.
The forward and aft hooks will not open unless a force is
applied. As long as one of the CARGO HOOK RELEASE
switches are pressed, the forward and aft hooks will
make a chattering sound. This sound indicates the hook
solenoids are operating normally.
4. CARGO HOOK SEL switch MID.
5. Press the CARGO HOOK RELEASE switch
on the copilots cyclic stick Check that the
MID HOOK OPEN caution capsule comes
on and the hook opens.
6. CARGO HOOK SEL switch AFT.
F 7. Press the CARGO HOOK RELEASE switch
on the WINCH/HOIST CONTROLGRIP
Check that the AFT HOOK OPEN caution
capsule comes on and the hook solenoid
activates. Reset and release to OFF.
8. CARGO HOOK MSTR switch RESET
and release to OFF. Check all HOOK OPEN
caution lights go out and the hooks close.
Then set ARM.
9. CARGO HOOK SEL switch TANDEM.
10. Press the CARGO HOOK RELEASE switch
on the pilots cyclic stick. Check that the
FWD and AFT HOOK OPEN caution cap-
sules come on and the forward and aft hook
11. CARGO HOOK MSTR switch RESET
and release to OFF. Check both HOOK
OPEN caution capsules go out and the
hooks close. Then set to ARM.
12. CARGO HOOK SEL switch ALL.
13. Press CARGO HOOK RELEASE switch on
the copilots cyclic stick Check that all