NTSB Identification: NYC83FU004.
The docket is stored on NTSB microfiche number 25562.
Accident occurred Wednesday, May 11, 1983 in TURNERS FALLS, MA
Aircraft: VECTOR 610, registration: NONE
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.

ON 4/18/83, THE ULTRALIGHT VEHICLE WAS DAMAGED BY HIGH WINDS. THIS NECESSITATED THE REPLACEMENT OF THE FRONT & REAR SPARS AS WELL AS THE BATTENS WHICH PROVIDED CURVATURE TO THE UPPER WING SURFACE. PRIOR TO A TEST FLT, A WEIGHTED TAIL WHEEL WAS ALSO INSTALLED. SUBSEQUENTLY, A TEST PLT TOOK OFF TO EVALUATE THE ULTRALIGHT. WITNESSES OBSERVED THAT THE PLT CLIMBED TO ABOUT 1000 FT, THEN BEGAN A SERIES OF MANEUVERS. WHILE PERFORMING A MANEUVER, SIMILAR TO A LAZY 8, WITH BANK ANGLES UP TO 60 TO 90 DEG, THE ULTRALIGHT'S LEFT WING FOLDED. THE VEHICLE THEN ENTERED AN UNCONTROLLEDDESCENT & CRASHED. AN EXAM OF THE WRECKAGE REVEALED THAT THE AFT SPAR TIP HAD ROTATED AROUND THE AFT SPAR IN SUCH A MANNER THAT THE OUTBOARD WING PANEL HAD BENT DOWN & REARWARD. HOLES HAD NOT BEEN DRILLED & STEEL POP RIVETS HAD NOT BEEN INSTALLED, PER INSTALLATION INSTRUCTIONS, TO PREVENT THE SPAR TIP FROM ROTATING. ALSO, THE PLT'S BLOOD ALCOHOL LEVEL WAS FOUND TO BE 95 MG%. THE TEST PLT ALSO PERFORMED MAINTENANCE ON THE ULTRALIGHT.

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

WING,WINGTIP..LOOSE

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

MAINTENANCE,MAJOR REPAIR..IMPROPER..PILOT IN COMMAND

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

MAINTENANCE,INSPECTION..INADEQUATE..PILOT IN COMMAND

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

WING..FAILURE,TOTAL



Contributing Factors

IMPAIRMENT(ALCOHOL)..PILOT IN COMMAND


Contributing Factors

MANEUVER..PERFORMED..PILOT IN COMMAND

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