Casualties unknown

1983-06-19: Cessna 140 (N89410) — Bettles, AK

Bettles, AK, US

On June 19, 1983, a Cessna 140 (registration N89410) was involved in an aviation accident near Bettles, AK. Investigators recorded the probable cause as: The pilot's failure to maintain adequate acceleration during takeoff, which led to an aborted takeoff with heavy braking that resulted in a nose-over. 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

An aircraft sustained damage after nosing over during an aborted takeoff. The pilot initiated the abort due to slow acceleration, applying heavy braking which caused the nose gear to collapse.

What happened

The aircraft experienced a nose-over incident while attempting to depart from the airfield. According to the pilot's account, the decision was made to initiate takeoff toward the south because there was no wind present at the time. During the ground roll, the pilot noted that the acceleration was slower than expected for the conditions.

As the aircraft continued down the runway with insufficient speed buildup, the pilot decided to abort the departure. He closed the throttle and applied heavy braking in an attempt to stop the aircraft safely. The sudden application of brakes caused the aircraft to bounce on the runway surface. This impact resulted in the nose gear collapsing, leading to the aircraft nosing over forward.

The investigation

Post-accident examination revealed that the aircraft sustained significant damage as a result of the nose-over. Despite the structural damage to the airframe, the occupants were not injured during the event. The pilot's statement confirmed that the primary factor in the sequence of events was the delayed recognition of slow acceleration during the takeoff roll.

Findings

The accident was caused by the pilot's decision to abort the takeoff after accelerating too slowly. The heavy braking applied to stop the aircraft led to a bounce and subsequent collapse of the nose gear. Contributing factors included the lack of wind, which may have affected performance expectations, and the pilot's judgment in continuing the takeoff roll until it was no longer safe to abort.

Probable cause

The pilot's failure to maintain adequate acceleration during takeoff, which led to an aborted takeoff with heavy braking that resulted in a nose-over.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X43179. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.