ASN Wikibase Occurrence # 381217
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| Date: | Friday 5 August 1983 |
| Time: | 20:30 LT |
| Type: | American Aerolights EAGLE XL |
| Owner/operator: | William Phillips Ii |
| Registration: | UNREG |
| MSN: | 20029 |
| Engine model: | CUYUNA 430R |
| Fatalities: | Fatalities: / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Mayville, NY -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Mayville, NY (D79) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
ACCORDING TO WITNESSES, THE ULTRALIGHT WAS IN LEVEL FLT AT APRX 150 TO 200 FT AGL WHEN THEY HEARD A LOUD BANG. SHORTLY THEREAFTER, THE ENG NOISE CEASED & THE VEHICLE ENTERED A SPIRALING DESCENT & CRASHED. A RIP IN THE WING CENTER SECTION WAS SEEN PRIOR TO IMPACT. AN EXAM REVEALED THAT THE LARGE REDUCTION ASSEMBLY, DRIVE PULLEY HAD SEPARATED FROM THE DRIVE SHAFT. 2 OF 4 CONNECTING BOLTS WERE FOUND FRACTURED & THE OTHER 2 HAD SEPARATED WITHOUT FRACTURING. THERE WAS EVIDENCE OF LOOSENESS & FRETTING PRIOR TO THE BOLT FAILURES. RED PAINT HAD TRANSFERRED FROM THE PROP TIPS TO THE WING STRUTS. THEPROP TIPS HAD SEPARATED & THE WING FABRIC HAD TORN AT THE WING ROOTS ON EACH SIDE OF THE CENTER SECTION. THE FAILED & MISSING BOLTS HAD BEEN INSTALLED DURING A DRIVE SHAFT PULLEY ADAPTER HUB RETROFIT, APRX 3 FLT HRS PRIOR TO THE ACCIDENT,BEFORE THE PLT PURCHASED THE ULTRALIGHT FROM A PREVIOUS OWNER. NO WASHERS, TORQUE VALUES OR SAFETYING REQUIREMENTS WERE SPECIFIED FOR THE BOLTS IN THE RETROFIT INSTRUCTIONS & THE BOLTS HAD NOT BEEN SAFETY WIRED.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB NYC83FU009
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 01:05 | ASN Update Bot | Added |
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