Casualties unknown

Aircraft Impacts Terrain After Abnormal Pitch and Turn; Marijuana Found Onboard (N4376F)

Valley Center, CA, US

On March 28, 1988, a Piper PA-28-151 (registration N4376F) operated by Barwick, Kenneth D. was involved in an aviation accident near Valley Center, 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

Witnesses saw the aircraft pitch up abnormally after takeoff, turn left, and descend. Impact occurred east of the runway. No mechanical issues were found, but marijuana metabolites were detected in the pilot and paraphernalia in the cabin.

Incident Description

Witnesses reported that the aircraft rotated to a high pitch attitude during the initial climb after takeoff. They then observed the aircraft enter a left turn and descend to the ground. The impact occurred on rising terrain, beyond a gully, approximately 200 feet east of the departure end of Runway 17.

Investigation Findings

An examination of the aircraft revealed no evidence of preimpact part failure or malfunction, although the aircraft was extensively damaged during the impact. The pilot had reported 2,000 hours of flight time on an application for a medical certificate dated April 29, 1987.

A drug screen of the pilot's urine showed the presence of marijuana metabolites, and a toxicology check of his blood revealed a carboxy-THC level of 47 ng/mL. Additionally, a partially smoked marijuana cigarette, a marijuana pipe with filters, and some unidentified seeds were found in the cabin of the aircraft after the accident.

Frequently asked questions

What happened in the 28 Mar 1988 Piper PA-28-151 accident near Valley Center, CA?

Witnesses saw the aircraft pitch up abnormally after takeoff, turn left, and descend. Impact occurred east of the runway. No mechanical issues were found, but marijuana metabolites were detected in the pilot and paraphernalia in the cabin.

What aircraft was involved and where did it happen?

The accident on 28 Mar 1988 involved a Piper PA-28-151, registration N4376F, operated by Barwick, Kenneth D., at Valley Center, CA.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X25291. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.