Casualties unknown

1996-05-27: Hiller UH-12 (N174HA) — Walla Walla, WA

Walla Walla, WA, US

On May 27, 1996, a Hiller UH-12 (registration N174HA) was involved in an aviation accident near Walla Walla, WA. Investigators recorded the probable cause as: the pilot's inadequate preflight/planning, and his failure to refuel the helicopter with sufficient fuel before flight, which resulted in fuel exhaustion and a subsequent forced landing. 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 a refueling attempt, a helicopter's engine quit due to fuel exhaustion about 2.5 nautical miles from the airport, leading to an autorotation and rollover that caused substantial damage.

Incident Summary

The pilot reported that the helicopter's fuel supply was exhausted while attempting to land at the destination airport for refueling. The event resulted in an autorotation, a rollover, and substantial damage to the helicopter.

Sequence of Events

According to the pilot, an earlier attempt to refuel at a remote landing zone equipped with a fuel truck was unsuccessful because the truck was unable to pump fuel at that time. The pilot and the owner of the operation then boarded the helicopter and decided to fly to the airport, believing there were about 14 gallons of fuel on board. The pilot had planned to land the helicopter en route if the fuel gauge reached the 'yellow' range during the flight.

Approximately 2.5 nautical miles from the airport, the fuel gauge needle was observed to be slightly outside of the yellow range, and the engine subsequently quit. The pilot immediately executed an autorotation. During the landing, one of the helicopter's skids impacted soft terrain, causing a main rotor blade to strike the ground. The helicopter rolled over.

Damage

The helicopter sustained substantial damage as a result of the rollover.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X05879. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.