Casualties unknown

Light aircraft collides with power lines during low-altitude joyride (N51234)

Descanso, CA, US

On June 30, 1988, a Cessna 172P (registration N51234) operated by Funbirds Flying Club, Inc. was involved in an aviation accident near Descanso, CA. Investigators recorded the probable cause as: The pilot's decision to fly at low altitude over terrain, which resulted in collision with electrical transmission lines. 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

Multiple witnesses observed a light aircraft flying at extremely low altitudes over rolling hills before striking electrical transmission lines and crashing onto Interstate 8.

What happened

Numerous witnesses reported observing an aircraft operating at dangerously low altitudes, ranging from 50 to 300 feet above ground level. The flight was characterized by some observers as terrain flying, with the pilot navigating closely over rolling hills and roadways. The joyriding excursion concluded when the aircraft, while maintaining an altitude of approximately 100 feet, collided with electrical transmission lines. Following the impact, the aircraft entered an uncontrolled descent and crashed onto Interstate 8, resulting in a post-impact fire.

The investigation

The investigation relied heavily on eyewitness accounts to reconstruct the final moments of the flight. Investigators confirmed that the aircraft struck overhead power structures before impacting the highway below. No mechanical failure was cited as a primary factor; rather, the low-altitude operation directly led to the collision with the transmission lines.

Findings

The primary contributing factor was the decision to conduct terrain flying at altitudes insufficient to clear overhead obstacles. The aircraft's proximity to the ground left no margin for error when encountering power lines in a hilly environment. This case highlights the extreme danger of low-level flight operations near infrastructure.

Probable cause

The pilot's decision to fly at low altitude over terrain, which resulted in collision with electrical transmission lines.

Frequently asked questions

What happened in the 30 Jun 1988 Cessna 172P accident near Descanso, CA?

Multiple witnesses observed a light aircraft flying at extremely low altitudes over rolling hills before striking electrical transmission lines and crashing onto Interstate 8.

What aircraft was involved and where did it happen?

The accident on 30 Jun 1988 involved a Cessna 172P, registration N51234, operated by Funbirds Flying Club, Inc., at Descanso, CA.

What was the probable cause of the accident?

The pilot's decision to fly at low altitude over terrain, which resulted in collision with electrical transmission lines.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X25978. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.