ASN Wikibase Occurrence # 36867
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| Date: | Sunday 12 December 1999 |
| Time: | 13:30 LT |
| Type: |  Wittman W-8 Tailwind |
| Owner/operator: | Timothy Gordon Mccarty |
| Registration: | N654 |
| MSN: | 269 |
| Total airframe hrs: | 119 hours |
| Engine model: | Lycoming O-320-A3B |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Near Jamestown, ND -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Norcross, MN (KPVT) |
| (KJMS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The accident airplane was destroyed during an in-flight separation of the right wing and subsequent in-flight collision with terrain. The airplane was constructed by the owner and was certified as an experimental/amateur-built airplane by the Federal Aviation Administration. The inboard 15-inches of the right wing spar was sent to the United States Department of Agriculture (USDA) Forest Product Laboratory, Madison, Wisconsin, for examination. According to an examination report, the accident wing spar was constructed of Sitka Spruce (Picea sitchensis). The report stated, 'It appears that the bolt holes that were drilled through the spars to accept the 1/4-inch bolts were not all drilled perpendicular to the spar's outer surfaces.' Examination of the second hole from the inboard end, 'suggests that this particular hole was drilled twice to make the bolt for this connection fit.' The report stated, '...the holes that are on either side of the spar are not evenly spaced. There is also considerable difference in the diameter of the middle two holes relative to the diameter of the outer two holes.'
Probable Cause: the wing spar failure due to its inadequate construction by the owner/builder.
Accident investigation:
 |
|
Sources:
NTSB CHI00LA043
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 02-Jul-2013 02:42 | JINX | Updated [Time, Aircraft type, Operator, Location, Departure airport, Destination airport, Source] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 14-Dec-2017 10:01 | ASN Update Bot | Updated [Operator, Departure airport, Destination airport, Source, Narrative] |
| 07-Apr-2024 16:18 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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