ASN Wikibase Occurrence # 280354
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| Date: | Tuesday 12 July 2022 |
| Time: | 11:00 LT |
| Type: | Zenith Zodiac 650B |
| Owner/operator: | |
| Registration: | N452VC |
| MSN: | 65-8452 |
| Year of manufacture: | 2015 |
| Total airframe hrs: | 285 hours |
| Engine model: | Westedt Corvair Conversion |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Eufaula, OK -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Eufaula, OK |
| Eufaula, OK | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilots, who were both owners and builders of the airplane, while maneuvering during a local flight, the engine began to run rough. The engine power continued to decrease until they could not maintain altitude. Unable to reach a nearby airport, the pilot flying elected to perform an off-airport emergency landing. During the landing, the airplane impacted uneven terrain, which resulted in substantial damage to the right wing.
Postaccident examination of the engine revealed the No. 5 cylinder exhaust valve rocker arm attach stud/bolt had failed. About 5 flight hours before the accident, the owners had replaced the No. 5 cylinder exhaust valve, which included the removal and reinstallation of the rocker arm hardware. The push rod contained an oil passage hole on one end that allowed for lubrication of the rocker arm, and the other end did not contain an oil passage. According to the owner, during the installation he incorrectly installed the push rod in a backward position. The incorrect installation did not allow lubrication to reach the rocker arm, causing it to fail.
Probable Cause: The loss of engine power due to a push rod that was incorrectly installed by the airplane owner.
Accident investigation:
 |
|
Sources:
NTSB CEN22LA315
FAA register: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=452VC
https://flightaware.com/live/flight/N452VC
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Jul-2022 17:58 | AgOps | Added |
| 14-Jul-2022 00:30 | johnwg | Updated [Time, Location, Departure airport, Source, Narrative, Category] |
| 20-Jul-2022 01:25 | Captain Adam | Updated [Time, Phase, Destination airport, Damage, Narrative] |
| 16-Nov-2023 15:30 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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