ASN Wikibase Occurrence # 290746
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| Date: | Friday 6 November 2015 |
| Time: | 16:30 LT |
| Type: |  Thorp T 18 |
| Owner/operator: | |
| Registration: | N1488 |
| MSN: | 303 |
| Year of manufacture: | 1968 |
| Total airframe hrs: | 1358 hours |
| Engine model: | Textron Lycoming O-320-B2A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Independence, Oregon -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Independence, OR |
| Independence, OR | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot departed on a local flight; during initial climb, the canopy partially disconnected from the airplane and the airplane vibrated violently. The pilot made a precautionary landing in a field, and the right wing impacted a fence post. Postaccident examination revealed that the mechanism that allowed the canopy to move fore and aft and retained the aft portion of the canopy during flight separated at a weld, which resulted in airflow into the cockpit. The components were not made available for metallurgical examination and the failure mode could not be determined; however, it is possible that the separation was due to repeated loading on the canopy over time. According to the pilot and a representative of the airplane type club, the canopy design was unique to the accident airplane, and was likely the only one of its kind.
Probable Cause: A separation of the canopy mechanism during flight, which resulted in the pilot's precautionary landing and the airplane's subsequent collision with a fence post.
Accident investigation:
 |
|
Sources:
NTSB WPR16LA023
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Oct-2022 19:02 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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