ASN Wikibase Occurrence # 382025
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| Date: | Wednesday 11 May 1983 |
| Time: | 18:05 LT |
| Type: | Vector 610 |
| Owner/operator: | Aerodyne Systems, Inc. |
| Registration: | UNREG |
| MSN: | 1244 |
| Total airframe hrs: | 70 hours |
| Engine model: | ZENOAH G25B |
| Fatalities: | Fatalities: / 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: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC83FU004
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 09:32 | ASN Update Bot | Added |
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