NTSB Identification: LAX83FA246.
The docket is stored on NTSB microfiche number 21440.
Accident occurred Monday, May 23, 1983 in PORTOLA, CA
Aircraft: HERPST VARIEZE, registration: N882BF
Injuries: 2 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.

THE HOME BUILT ACFT COLLIDED WITH TREES & CRASHED ON RISING TERRAIN WHILE THE PLT & PASSENGER WERE ON A SIGHT-SEEING FLT. THE ACCIDENT OCCURRED AT AN ELEVATION OF 7000 FT, THE DENSITY ALTITUDE WAS ESTIMATED TO BE APRX 10000 FT. THE WRECKAGE WAS SCATTERED APRX 290 FT ALONG A SOUTHERLY DIRECTION. ABOUT 40 MILES EAST OF THE CRASH SITE, THE WIND WAS FROM 360 DEG AT 10 KTS. THE PLT HAD BEEN USING AUTOMOTIVE FUEL IN THE ENG. THE OWNER'S MANUAL STATED, 'AUTO GAS, ESPECIALLY THE HIGH AEROMATIC CONTENT NO-LEAD, SHOULD NOT BE USED.' NO EVIDENCE OF A PREIMPACT STRUCTURAL FAILURE WAS REPORTED.

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND


Contributing Factors

FLUID,FUEL..IMPROPER


Contributing Factors

MAINTENANCE,SERVICE OF AIRCRAFT/EQUIPMENT..IMPROPER..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..HIGH DENSITY ALTITUDE


Contributing Factors

TERRAIN CONDITION..HIGH TERRAIN


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..RISING


Contributing Factors

OBJECT..TREE(S)

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