Casualties unknown

Substantial Damage After Partial Power Loss Due to Fuel Contamination (N7887H)

Harding Lake, AK, US

On August 24, 1992, a Piper PA-12 (registration N7887H) operated by Stepovich, Christopher A. was involved in an aviation accident near Harding Lake, AK. Investigators recorded the probable cause as: The pilot's decision to use automotive fuel in an engine not approved for such use, which resulted in a partial loss of engine power. 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 2026-06-19Data APIEditorial standards

A pilot experienced partial engine power loss shortly after takeoff, necessitating an off-airport forced landing that caused substantial damage to the aircraft.

What happened

The pilot reported experiencing a partial loss of engine power immediately following takeoff. This mechanical issue necessitated an off-airport forced landing, which resulted in substantial damage to the airplane. Following the accident, the engine was tested and operated normally without any issues that could be considered causal to the initial power loss.

The investigation

Post-accident analysis was conducted on the fuel drained from the airplane. The examination indicated that the aviation fuel had been blended with automotive fuel. It is important to note that the specific engine installed in the aircraft was not approved for the use of automotive fuel.

Probable cause

The pilot's decision to use automotive fuel in an engine not approved for such use, which resulted in a partial loss of engine power.

Frequently asked questions

What happened in the 24 Aug 1992 Piper PA-12 accident near Harding Lake, AK?

A pilot experienced partial engine power loss shortly after takeoff, necessitating an off-airport forced landing that caused substantial damage to the aircraft.

What aircraft was involved and where did it happen?

The accident on 24 Aug 1992 involved a Piper PA-12, registration N7887H, operated by Stepovich, Christopher A., at Harding Lake, AK.

What was the probable cause of the accident?

The pilot's decision to use automotive fuel in an engine not approved for such use, which resulted in a partial loss of engine power.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X15301. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.