ASN Wikibase Occurrence # 133564
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| Date: | Sunday 10 August 1997 |
| Time: | 07:40 LT |
| Type: |  Ryan Navion B |
| Owner/operator: | Brian Banks |
| Registration: | N512AK |
| MSN: | NAV42222B |
| Total airframe hrs: | 4399 hours |
| Engine model: | Lycoming GO-480-B1A6 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Las Vegas, NV -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | (KVGT) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot completed a run-up with no malfunctions noted, and was cleared for a left downwind departure. As he was departing from the downwind he felt a vibration on the yoke and was returning to land. About 10 seconds later the vibration on the yoke became violent. An explosion occurred and the cabin reportedly filled with smoke. A second explosion followed and the cowling departed the right side of the aircraft and struck the windshield. The pilot made a landing in a residential area, striking a tree and a vehicle during the landing sequence. Examination of the engine revealed that the No. 3 cylinder had separated from the engine, and the hold down nuts to the No's. 1 and 5 cylinders were hand tight. Review of the maintenance records disclosed no evidence of cylinder removals since the last overhaul in 1982, which was 55 hours prior to the accident.
Probable Cause: The separation of the number 3 cylinder due to improper overhaul procedures, and the failure to adequately torque the cylinder hold down nuts and through bolts to specification.
Accident investigation:
 |
|
Sources:
NTSB LAX97LA280
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 08-Apr-2024 13:34 | ASN Update Bot | Updated [Time, Cn, Operator, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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