NTSB Identification: LAX83LA052
14 CFR Part 91: General Aviation
Accident occurred Wednesday, December 08, 1982 in SOUTH LAKE TAHO, CA
Probable Cause Approval Date: 12/08/1983
Aircraft: CESSNA 172M, registration: N20016
Injuries: 1 Minor,1 Uninjured.
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 STUDENT PILOT AND A PASSENGER DEPARTED THE SOUTH LAKE TAHOE AIRPORT AT 1515 PST. HE STATED THAT HE HAD CLIMBED TO ABOUT 1200 FT AGL WHEN HE ENCOUNTERED EXTREME TURBULENCE AND DOWNDRAFTS. HE LOST CONTROL OF THE AIRCRAFT UNTIL JUST PRIOR TO GROUND IMPACT. A HELICOPTER PILOT THAT WAS IN THE AREA JUST AFTER THE ACCIDENT ALSO REPORTED MODERATE TO SEVERE TURBULENCE. THE DEPARTURE AIRPORT WAS AT AN ELEVATION OF 6264 FT MSL NEAR MOUNTAINS. THE AIRCRAFT WAS EQUIPPED WITH LIGHTS TO DISPLAY COMMERCIAL ADVERTISEMENTS AT NIGHT.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:WEATHER CONDITION..MOUNTAIN WAVE
The National Transportation Safety Board determines the probable cause(s) of this accident to be:WEATHER CONDITION..DOWNDRAFT
WEATHER CONDITION..HIGH DENSITY ALTITUDE
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