NTSB Identification: LAX83FA034
14 CFR Part 91: General Aviation
Accident occurred Saturday, November 13, 1982 in ORINDA, CA
Probable Cause Approval Date: 11/13/1983
Aircraft: CESSNA 340A, registration: N29HT
Injuries: 1 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

AFTER DEPARTING SAN JOSE, CA, THE PLT CLIMBED TO AN ALT OF 4600 FT MSL & PROCEEDED TOWARD NOVATO, CA. FROM 1528 TO 1533 PST, RADAR DATA SHOWED THAT THE ACFT WAS LEVEL AT 4600 FT ON A HEADING OF 330 DEG AT 180 FTS GROUND SPEED. RADAR INFO SHOWED THAT THE ACFT THEN ENTERED A DESCENT. DURING A 24 SEC PERIOD, THE ACFT DESCENDED TO AN ALT OF 4100 FT MSL & ITS HEADING CHANGED 10 DEG TO THE RIGHT. THE LAST RADAR POSITION, 12 SEC LATER, REVEALED AN ADDITIONAL HEADING CHANGE OF 150 DEG TO THE RIGHT, ACCOMPANIED BY A DESCENT TO 2300 (9000 FRM DESCENT). WITNESSES SAW THE ACFT DESCENDING AT HIGH SPEED IN A RIGHT TURN WITH THE ENGS AT HIGH POWER. JUST PRIOR TO IMPACT, THE RIGHT BANK ANGLE & NOSE LOW ATTITUDE INCREASED. THE ACFT CRASHED IN A STEEP NOSE DOWN, RIGHT WING LOW, ATTITUDE. NO PREIMPACT,MECHANICAL MALFUNCTION OR FAILURE WAS FOUND. NO AUTOPSY WAS WAS MADE, ONLY A GROSS EXAM OF THE PLT'S FRAGMENTED BODY WAS POSSIBLE. BEFORE DEPARTING SAN JOSE, THE PLT HAD REMARKED THAT HE WAS BOTHERED BY A BAD COLD.

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

REASON FOR OCCURRENCE UNDETERMINED

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