Casualties unknown

Engine Power Loss During Final Approach Results in Collision with Trees (N917Q)

Thermal, CA, US

On September 13, 1986, a Beech 35-B33 (registration N917Q) was involved in an aviation accident near Thermal, CA. 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 on a local flight to break in a new engine cylinder experienced an engine power loss on final approach, leading to a collision with trees short of the runway. Only residual fuel was found in the wing tanks.

Incident Overview

A pilot departed on a local flight intended to put break-in time on a newly installed engine cylinder. The pilot reported having departed with a low fuel level, indicating an intention to remain airborne for only a short duration. After approximately 40 minutes of flight, the pilot returned to the airport. During the final approach, the engine lost power, and the aircraft subsequently collided with trees about one-half mile short of the runway.

Examination Findings

Following the incident, an examination of the aircraft revealed that only residual fuel remained in both wing tanks. No other mechanical anomalies were noted in the source.

Pilot Statement

The pilot stated that he departed with a low fuel level but was only planning to be airborne for a little while. The purpose of the flight was to accumulate operating time on the newly installed engine cylinder.

Frequently asked questions

What happened in the 13 Sept 1986 Beech 35-B33 accident near Thermal, CA?

A pilot on a local flight to break in a new engine cylinder experienced an engine power loss on final approach, leading to a collision with trees short of the runway. Only residual fuel was found in the wing tanks.

What aircraft was involved and where did it happen?

The accident on 13 Sept 1986 involved a Beech 35-B33, registration N917Q, at Thermal, CA.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34813. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.