Casualties unknown

Airplane Crashes on Mountainside During Landing Attempt (N6592L)

Bettles, AK, US

On August 10, 1992, a Piper PA-18 (registration N6592L) operated by Robert J. Sept was involved in an aviation accident near Bettles, AK. Investigators recorded the probable cause as: THE PILOT'S IMPROPER IN FLIGHT PLANNING/DECISION, AND HIS FAILURE TO MAINTAIN A PROPER ALTITUDE WHILE OPERATING IN THE MOUNTAINS. A CONTRIBUTING FACTOR WAS THE MOUNTAINOUS TERRAIN. 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 2026-06-10Data APIEditorial standards

An airplane crashed at 3,300 feet on a 30-degree mountainside. The pilot reported touching down early during an approach, while a passenger stated the aircraft became too low and slow to outclimb the terrain.

Accident Overview

An airplane impacted terrain at the 3,300-foot level on a mountainside with an approximate 30-degree gradient. The pilot stated that he was on approach to land on the mountainside and that the airplane "touched down early." The passenger reported that they were planning to fly through a pass ahead and that the airplane got "too low and too slow," after which it could not outclimb the rising terrain.

Eyewitness and Recovery

The helicopter pilot who recovered the wreckage noted that there were no suitable landing areas nearby. No other details about the aircraft, occupants, or environmental conditions were provided in the source.

Pilot and Passenger Accounts

The pilot's account focused on the intention to land on the slope and the early touchdown. The passenger's account indicated a different intention: to fly through a pass, implying the flight may have been a low-altitude transit rather than a landing attempt. The discrepancy between the two accounts is noted but not resolved in the source.

Terrain and Conditions

The mountainside where the crash occurred had a gradient of approximately 30 degrees. The helicopter pilot's observation about the lack of suitable landing areas suggests the terrain was not conducive to safe landing or recovery.

Conclusion

The source provides multiple perspectives on the sequence of events but does not specify a probable cause. The investigation primarily records the pilot's and passenger's statements and the recovery pilot's observation.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X15295. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.