NTSB Identification: LAX88LA247.
The docket is stored on NTSB microfiche number 37743.
Accident occurred Friday, July 01, 1988 in MONTAGUE, CA
Probable Cause Approval Date: 11/07/1989
Aircraft: SCHWEIZER SGS-1-26A, registration: N2726Z
Injuries: 1 Fatal.

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

DURING A PLEASURE FLIGHT, THE LAST TRANSMISSION BY THE PILOT STATED HE WAS GOING TO SEE WHAT THE GLIDER COULD DO BESIDES STRAIGHT AND LEVEL FLIGHT. WITNESSES IN THE AREA REPORTED THAT THEY HEARD A LOUD POP AND OBSERVED THE GLIDER, MINUS THE LEFT WING, IN A VERTICAL DESCENT AND COLLIDE WITH THE TERRAIN. THE WING SPAR BROKE TWO FEET FROM THE ROOT. A METALLURGICAL TEST PERFORMED ON THE SPAR REPORTED THAT THE SPAR BROKE IN A POSITIVE (UP) OVERLOAD. POST ACC INVEST REVEALED THE ACFT WAS PLACARDED FOR PLT WT NOT TO EXCEED 166 LBS. THE REC PLT WEIGHED 210 LBS. A SCHWEIZER SERVICE BULLETIN RESTRICTS THIS SAILPLANE FROM AEROBATICS.

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

WING,SPAR..OVERLOAD

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

DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND

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

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


Contributing Factors

AIRCRAFT WEIGHT AND BALANCE..EXCESSIVE..PILOT IN COMMAND

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