Casualties unknown

Accident in Mountain Pass with Rapidly Changing Stratus Clouds (N5157L)

San Bernardino, CA, US

On January 5, 1989, a Piper PA-28-180 (registration N5157L) operated by Troxell, Carl R. was involved in an aviation accident near San Bernardino, CA. Investigators recorded the probable cause as: THE PILOT'S DECISION TO CONTINUE VFR FLIGHT AFTER ENCOUNTERING INSTRUMENT METEOROLOGICAL CONDITIONS WHILE ATTEMPTING TO TRANSIT THROUGH A MOUNTAIN PASS. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 4 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

An accident occurred in a mountain pass at 3,200 ft elevation, with rapidly forming and dissipating stratus clouds reported by sheriff's helicopter pilots. The pilot had recently completed 13 hours of instrument dual instruction.

Accident Site

The accident site is located in a mountain pass at an elevation of 3,200 feet mean sea level, about half a mile from an interstate highway. The pass is flanked by mountains rising to 10,000 feet on both sides.

Weather Conditions

Sheriff's helicopter pilots who were flying patrol before, during, and after the accident time frame reported rapidly forming and dissipating stratus clouds. These clouds obscured the hillsides and the floor of the pass.

Pilot Background

The pilot had arranged for a coworker to pick him up at the destination airport. The pilot had recently obtained 13 hours of instrument dual instruction.

No Probable Cause Stated

The investigation source does not provide a probable cause for the accident.

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Frequently asked questions

What happened in the 5 Jan 1989 Piper PA-28-180 accident near San Bernardino, CA?

An accident occurred in a mountain pass at 3,200 ft elevation, with rapidly forming and dissipating stratus clouds reported by sheriff's helicopter pilots. The pilot had recently completed 13 hours of instrument dual instruction.

What aircraft was involved and where did it happen?

The accident on 5 Jan 1989 involved a Piper PA-28-180, registration N5157L, operated by Troxell, Carl R., at San Bernardino, CA.

What was the probable cause of the accident?

THE PILOT'S DECISION TO CONTINUE VFR FLIGHT AFTER ENCOUNTERING INSTRUMENT METEOROLOGICAL CONDITIONS WHILE ATTEMPTING TO TRANSIT THROUGH A MOUNTAIN PASS. CONTRIBUTING FACTORS WAS: THE PILOT'S SELF-INDUCED PRESSURE KNOWING THAT A CO-WORKER WAS PROBABLY WAITING FOR HIM AT THE DESTINATION AIRPORT; OVER CONFIDENCE IN…

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X27596. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.