Casualties unknown

1997-07-22: Bell 47G-3B1 (N3069G) — Wood, Milton, H. — Idaho Falls, ID

Idaho Falls, ID, US

On July 22, 1997, a Bell 47G-3B1 (registration N3069G) operated by Wood, Milton, H. was involved in an aviation accident near Idaho Falls, ID. Investigators recorded the probable cause as: The pilot's decision to take off in a tailwind with an overweight condition caused by ground crew loading errors, which led to loss of control and structural failure. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

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

A helicopter suffered structural failure during takeoff after being over-fueled and loaded with chemical by ground crew, resulting in a tailwind departure and skid collapse at high density altitude.

What happened

The pilot initially requested a specific loadout prior to departure, asking for 15 gallons of fuel and 30 gallons of fungicide. However, the ground crew mistakenly loaded the aircraft with 40 gallons of fuel and 40 gallons of chemical instead. This error resulted in the helicopter being significantly heavier than intended.

During the takeoff roll, the pilot attempted to lift off while encountering a tailwind. The excessive weight, combined with the adverse wind conditions and high density altitude of approximately 5,500 feet, prevented the rotorcraft from achieving sufficient lift. As a result, the helicopter settled back toward the ground during the initial climb phase.

The impact forces caused immediate structural failure. The right skid collapsed upon contact with the surface, and the stress was severe enough to cause the tailboom separated from the main fuselage. The aircraft sustained substantial damage due to the combination of overloading and improper takeoff conditions.

Probable cause

The pilot's decision to take off in a tailwind with an overweight condition caused by ground crew loading errors, which led to loss of control and structural failure.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X08516. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.