ASN Wikibase Occurrence # 39031
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Date: | Wednesday 11 May 1983 |
Time: | 18:05 |
Type: | Vector 610 |
Owner/operator: | Aerodyne Systems |
Registration: | unreg. |
MSN: | 1244 |
Fatalities: | Fatalities: 1 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Turners Falls, MA -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Unknown |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative: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. CAUSE:
Sources:
NTSB:
https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X43121 Revision history:
Date/time | Contributor | Updates |
24-Oct-2008 10:30 |
ASN archive |
Added |
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