On December 18, 2003, a Hughes 369D (registration N1113L) was involved in an aviation accident near Wahiawa, HI. Investigators recorded the probable cause as: The pilot's failure to properly secure the external sling load, which allowed the load to shift, and subsequently strike and remove the tail rotor. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A commercial helicopter transporting a sling load of taped ladders experienced a load shift, causing a ladder to strike and separate the tail rotor. The pilot performed an autorotation, but the helicopter rolled onto its side during landing.
Incident Overview
A commercial helicopter was engaged in an external load operation, carrying a bundle of ladders taped together and suspended from a 15-foot line. During the flight, the load shifted, and one of the ladders made contact with the tail rotor. The impact caused the tail rotor to separate from the helicopter.
Emergency Response
Following the tail rotor separation, the pilot initiated an emergency autorotation to manage the descent. The helicopter touched down at an off-airport location and subsequently rolled onto its side.
Operational Context
According to the operator's FAA-approved flight manual for external loads, the pilot bears sole responsibility for ensuring that the load is properly rigged before departure.
Frequently asked questions
What happened in the 18 Dec 2003 Hughes 369D accident near Wahiawa, HI?
A commercial helicopter transporting a sling load of taped ladders experienced a load shift, causing a ladder to strike and separate the tail rotor. The pilot performed an autorotation, but the helicopter rolled onto its side during landing.
What aircraft was involved and where did it happen?
The accident on 18 Dec 2003 involved a Hughes 369D, registration N1113L, at Wahiawa, HI.
What was the probable cause of the accident?
The pilot's failure to properly secure the external sling load, which allowed the load to shift, and subsequently strike and remove the tail rotor.
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