No fatalities

Engine Power Loss During Night Departure Leads to Forced Landing and Wing Separation (N4129J)

Hesperia, CA, US

On April 16, 1994, a Piper PA-28-140 (registration N4129J) operated by George Abernathy was involved in an aviation accident near Hesperia, CA. No fatalities were reported. Investigators recorded the probable cause as: LOSS OF ENGINE POWER DUE TO AN AIR LEAK AT THE GASCOLATOR GASKET, WHICH WAS IMPROPERLY INSTALLED DURING MAINTENANCE. DARKNESS WAS A RELATED FACTOR. 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

During a night departure from an uncontrolled airport, an airplane experienced engine power loss at about 200 feet. The pilot conducted a forced landing, during which the left wing separated after striking a bush. Post-accident inspection revealed gascolator discrepancies.

Departure and Power Loss

The pilot departed at night from an uncontrolled airport after an en route stop. During the initial climb, at approximately 200 feet above ground level, the engine began to lose power. The pilot was unable to restore power and selected an area for a forced landing.

Forced Landing and Wing Separation

During the landing, the airplane struck a bush, which resulted in the separation of the airplane's left wing. After the accident, the pilot recovered the airplane and conducted several post-crash inspections.

Post-Accident Examination

An examination of the engine by an FAA inspector revealed a leak at the gascolator gasket. Further examination showed that the gascolator was not safety wired and the fuel screen was missing. Additionally, the lip of the gascolator bowl had two gouges, the gasket was too small for the installation, and the gasket appeared to have allowed air into the fuel system. The FAA inspector could not determine to what extent the pilot's post-crash inspection had on the airworthiness of the airplane.

Previous Maintenance

The airplane had received an annual inspection approximately 25 flight hours before the accident.

Frequently asked questions

What happened in the 16 Apr 1994 Piper PA-28-140 accident near Hesperia, CA?

During a night departure from an uncontrolled airport, an airplane experienced engine power loss at about 200 feet. The pilot conducted a forced landing, during which the left wing separated after striking a bush. Post-accident inspection revealed gascolator discrepancies.

Were there any fatalities in the 16 Apr 1994 Piper PA-28-140 accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 16 Apr 1994 involved a Piper PA-28-140, registration N4129J, operated by George Abernathy, at Hesperia, CA.

What was the probable cause of the accident?

LOSS OF ENGINE POWER DUE TO AN AIR LEAK AT THE GASCOLATOR GASKET, WHICH WAS IMPROPERLY INSTALLED DURING MAINTENANCE. DARKNESS WAS A RELATED FACTOR.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001206X01133. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.