MIL-DTL-81014B
3.9.6.1.3 Manual release. The manual release shall be actuated when a link or cable from the
helicopter to the hook is pulled. The release shall release all loads from seven pounds to the
60,000-pound design limit. The hook need not be operable after release of loads between the
rated capacity and the design limit load but shall return to full operating condition with only minor
repairs or replacement of minor parts. The hook and its components shall incur no damage from
releases of loads up to rated capacity in this mode. The stroke through which the actuating
linkage must travel to execute a complete release of the hook shall be not less than 0.5-inch nor
greater than 1.25 inches including any pretravel. The amount of pretravel shall be not greater
than the actuating travel. The point at which the actuating force is applied to the mechanism shall
be so located that the mechanism shall release when a connection is made between it and a
vertically arising point located four inches above the mounting holes, two inches to starboard of
the fore-and-aft hook centerline, and not more than two inches forward or aft of the midpoint
between the mounting holes. The configuration of the manual release attachment point shall
accommodate a standard AN or MS terminal at the end of a 0.0625-inch diameter cable. The
force required to actuate this release under various load conditions shall be not greater than the
following:
LOAD
FORCE
None
15 lbs
20,000 lbs
50 lbs
60,000 lbs
80 lbs
The release mechanism shall provide a force of 9 ± 1 pounds at the point of attachment of the
actuating linkage in a direction which will retain the aircraft linkage in its de-actuated position.
This force is included in the release forces specified above.
3.9.6.1.4 Ground release. The ground release shall actuate when a link or cable from ground
personnel to the hook is pulled. The force required to actuate the release mechanism of the hook
by this method shall be not greater than 15 pounds under no-load condition. The release
mechanism shall not be actuated by falling or stringing objects, such as cables or heavy weights.
3.9.6.2 Relatch. After release of any load up to rated capacity, the hook load beam shall
automatically relatch into its load carrying condition within five seconds after the release controls
have returned to the non-release position. In the event the load beam does not relatch after
release of a load, reactuation of either the normal or manual release shall cause the load beam to
relatch.
3.9.6.3 Indication of unlatched load beam. There shall be a means on the hook to indicate
when the load beam is in an unlatched condition. The device shall complete the circuit when this
condition occurs, illuminating an aircraft light in accordance with MIL-L-7961.
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business