SUBJECT – Equipment and furnishing – Hoist – Inspection replacement
During a maintenance check flight with a MBB-BK 117 C-2 helicopter, a dummy load of 552 lbs (250kg) was picked up in order to conduct a “maximum load cycle” on the rescue hoist. The cable reeled-out without further command of the operator, causing the test dummy load to impact the ground.
The results of further examinations on the subject hoist determined that the overload clutch had failed. The overload clutch design is common to all Goodrich externally mounted rescue hoists listed in Appendix 1 of
EASA AD 2013-0065-E
This condition, if not detected and corrected, could lead to further cases of in-flight loss of the hoist load, possibly resulting in injury to persons on the ground or in a hoisting accident. For the reasons described above, this AD requires identification of the installed hoist and, for affected hoist installations, a one-time inspection and load check test of the externally mounted hoist.
Goodrich is a world leader in developing, manufacturing, and supporting helicopter rescue hoist and aircraft cargo winch systems. Goodrich hoist and winch produces both traditional level wind and industry unique translating drum cable management systems. These types of hoist and winch technologies are used around the world for critical rescue missions and cargo handling by the U.S. and international coast guards, U.S. Army, foreign and domestic armed forces, and paramilitary forces, such as police, firefighters, medical evacuation crews, and other local municipalities. Our rescue hoists have field proven success in high demand, extreme environment missions and have been instrumental in saving lives in several worldwide disaster relief efforts.