Casualties unknown

1999-08-08: Bell 47G-B3 (N6712D) — Selma, AL

Selma, AL, US

On August 8, 1999, a Bell 47G-B3 (registration N6712D) was involved in an aviation accident near Selma, AL. Investigators recorded the probable cause as: The pilot's failure to maintain the proper touchdown point during landing causing the landing skid to become entangled with the edge of the helipad platform and the resultant rollover and main rotor blade strike of the tow vehicle. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

During post-maintenance positioning onto a trailer, a helicopter's right skid slipped and hooked on the platform edge, causing backward movement and rotor blade collision with the truck.

Incident Overview

Following a test flight conducted after maintenance, the pilot/owner was positioning the helicopter onto a trailer with the tail oriented forward. During this maneuver, the right landing skid slipped off and became hooked on the edge of the landing platform.

Sequence of Events

Despite the application of full forward and left cyclic control inputs, the rotorcraft continued moving backward until the main rotor blades struck the aft portion of the truck.

Post-Accident Examination

The main rotor pitch control rods were removed and sent to the NTSB Materials Laboratory for failure analysis. Examination revealed that the rods possessed tensile strength below specification. However, all damage observed on the rods was consistent with impact damage rather than pre-existing failure.

No other items were reported as damaged or involved. The source does not specify aircraft registration, engine count, date, operator, location, occupants, injuries, or weather conditions.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X19587. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.