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Employment of these accessories is determined
by winch usage. A compartment bag is attached
to the bulkhead wall above the winch for stowage of
winching accessories.
a. Cable Pulleys. A sufficient number of pulleys are
provided to permit routing the winch cable for winching
and hoisting operations. The pulleys are equipped with
snap-lock fasteners for attachment to tiedown fittings or
shackles as required.
b. Cable Hook. A 2-ton-capacity removable hook is
provided for use in winching and hoisting operations.
Extending from the hook is a length of 1/4 inch cable,
equipped with a metal ball which locks into a quick-disconnect
device that is used for attaching the hook to the
cable. The full-swiveling hook contains a spring snap
lock to prevent opening of the hook and accidental loss
of cargo.
c. Quick-Disconnect Device. The quick-disconnect
device permits rapid connecting and disconnecting
of winch cable hooks. The device consists of a short
length of steel with socket cavities at each end. The
sockets are enclosed by spring-loaded rings that rest
against flared rims in either edge of the device. The lockrings
are depressed to admit the ball ends of the cables
into the sockets and snap into place when released, securing
the ball ends of the cables in a positive connection.
A guard is supplied with the quick-disconnect device.
When installed, it prevents the hoist operator from inadvertently
operating the quick-disconnect device when
assisting a rescued person into the helicopter.
d. Cable cutter. In hoisting operations, there is always
a possibility that the cable hook might snag, resulting
in critical strain on the hoisting system and restriction
of helicopter mobility. The cable cutter provides a means
of quickly severing the snagged hook by cutting the
cable. The cable cutter consists of a housing, two follower
rollers that permit free travel of cable through the housing,
a cutting shell, a ballistic cartridge, and a threaded
receptacle for electrical connector. The cutter housing is
split to allow reeving the cable and is bolted to a pulley
bracket through two holes in the housing. The cable cutter
is armed by coupling an arming device to the receptacle
in the cutter housing and plugging the device into
the receptacle above the utility hatch marked CABLE
CUTTER. The cable cutter cartridge is to be checked for
total time prior to any hoisting or rescue operations. The
cartridge should not be used after 8 years from date of
manufacture and should also be replaced after 1 year of
installed service life. Cartridges are considered over age
when either limit is exceeded.
WARNING
If personnel are in the cargo compartment
when a load is jettisoned, make sure that
they remain aft of the rescue hatch and
face away from the cable cutter. The hoist
cable can whip forward when it is cut and
particles can be ejected from the cable
cutter.
TM 1-1520-240-10
4-3-13
e. Cable Cutter Arming Device. The arming device
consists of an electrical wiring harness with electrical
connectors at either end. This device is used to arm the
cable cutter during hoisting operations. A connector at
one end of the device couples with the threaded receptacle
in the cable cutter; the connector at the other end
of the device plugs into a receptacle above the utility
hatch and is labeled CABLE CUTTER.
f. Extension Cord. A 15-foot extension cord is provided
to allow mobility of the winch or hoist operator.
Electrical connectors at each end of the cord connect
with receptacles in the winch control grip and in the hoist
control panel. This cord is the only means of plugging in
power to the switches on the control grip.
g. Safety Harness. A safety harness is provided for
the hoist operator in operations involving the use of the
rescue hatch. The harness permits complete freedom of
movement while affording a measure of safety in preventing
the wearer from falling through the door opening.
The safety harness is attached to a fitting on the wall of
the cargo compartment near the hoist control panel or a
floor tiedown fitting.
4-3-5. Hoisting System.
The hoisting system (fig. 4-3-9) is used for air rescue and
for aerial loading of smaller general cargo through the
utility hatch. The hoisting system differs from the winching
system only in the manner in which the cable is
reeved and the mode selected at the winch. Hoisting
operations require the winch cable to be reeved overhead
and the hoist load capacity to be limited to a maximum
of 600 pounds. The winch cable hook is used for
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