Casualties unknown

Pilot Reports Engine Power Loss, Later Admits No Engine Issue in Terrain Encounter (N8988R)

Eagle River, AK, US

On February 2, 1991, a Champion 7EC (registration N8988R) operated by Robert C. Bischoff was involved in an aviation accident near Eagle River, AK. Investigators recorded the probable cause as: THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN CLEARANCE FROM THE 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 2026-07-04Data APIEditorial standards

A pilot reported insufficient engine power and inability to clear trees, but an engine test found no mechanical reason. The pilot later told the buyer there was no engine problem, stating he was unable to outclimb the terrain.

Incident Overview

A pilot-in-command reported that his engine was not producing sufficient power and that he was unable to clear trees during a flight. The pilot stated that the engine continued to turn and did not stop.

Investigation Findings

Examination of the terrain revealed that the pilot turned toward rising terrain at the time he reported experiencing an engine problem. An engine test run conducted after the incident showed no mechanical reason for the alleged loss of power.

Subsequent Admission

The pilot-in-command later sold the airplane wreckage and engine to a buyer. During the transaction, the pilot stated to the buyer that there was not an engine problem, and that he was unable to outclimb the terrain.

Frequently asked questions

What happened in the 2 Feb 1991 Champion 7EC accident near Eagle River, AK?

A pilot reported insufficient engine power and inability to clear trees, but an engine test found no mechanical reason. The pilot later told the buyer there was no engine problem, stating he was unable to outclimb the terrain.

What aircraft was involved and where did it happen?

The accident on 2 Feb 1991 involved a Champion 7EC, registration N8988R, operated by Robert C. Bischoff, at Eagle River, AK.

What was the probable cause of the accident?

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN CLEARANCE FROM THE TERRAIN.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X16388. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.