NTSB Identification: LAX93LA091.
The docket is stored on NTSB microfiche number 51124.
Accident occurred Thursday, January 07, 1993 in SAN JACINTO, CA
Probable Cause Approval Date: 10/25/1993
Aircraft: CESSNA 172, registration: N20513
Injuries: 1 Serious.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PILOT WAS WHILE FLYING AT 10,500 FEET MSL ABOVE THE OVERCAST OVER A MOUNTAINOUS AREA. THE FLIGHT ENCOUNTERED SEVERE CLEAR AIR TURBULENCE CAUSING THE AIRCRAFT TO ENTER INTO AN UNCONTROLLED ROLL. WHEN THE PILOT REGAINED CONTROL OF THE AIRCRAFT IT HAD ENTERED THE CLOUDS. BEFORE THE PILOT COULD EFFECT A TOTAL RECOVERY THE AIRCRAFT COLLIDED WITH THE TREES AT THE CREST OF THE MOUNTAIN. THE ACCIDENT SITE ELEVATION IS 9,277 FEET MSL.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE FLIGHT'S ENCOUNTER WITH UNFORECAST CLEAR AIR TURBULENCE.

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