Investigator In Charge (IIC): Sauer, Aaron
The National Transportation Safety Board did not travel to the scene of this accident.
Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Oklahoma City, Oklahoma
Location: Eufaula, Oklahoma
Accident Number: CEN22LA315
Date and Time: July 12, 2022, 10:00 Local
Registration: N452VC
Aircraft: Zenith ZODIAC 650B
Injuries: 2 None
Flight Conducted Under: Part 91: General aviation - Personal
On July 12, 2022, about 1000 central daylight time, a Zenith 650B airplane, N452VC, sustained substantial damage when it was involved in an accident near Eufaula, Oklahoma. The pilot and pilot-rated passenger were not injured. The airplane was being operated as a Title 14 Code of Federal Regulations Part 91 personal flight.
According to the pilots, who were both owners and builders of the airplane, while maneuvering during a local flight to adjust the airplane’s autopilot, the engine began to run rough. The engine power continued to decrease, and they could not maintain altitude. Unable to make a nearby airport, the pilot 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 Corvair engine revealed the No. 5 cylinder exhaust valve rocker arm attach stud/bolt had failed (see Figure 1.).
About 10 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 failed hardware was retained for potential further examination.
Aircraft and Owner/Operator Information
Aircraft Make: Zenith
Registration: N452VC
Model/Series: ZODIAC 650B
Aircraft Category: Airplane
Amateur Built: Yes
Operator: On file
Operating Certificate(s) Held: None
Operator Designator Code:
Meteorological Information and Flight Plan
Conditions at Accident Site: VMC
Condition of Light: Day
Observation Facility, Elevation: KGZL,601 ft msl
Observation Time: 10:15 Local
Distance from Accident Site: 24 Nautical Miles
Temperature/Dew Point: 31°C /20°C
Lowest Cloud Condition: Clear
Wind Speed/Gusts, Direction: 8 knots / , 310°
Lowest Ceiling: None
Visibility: 10 miles
Altimeter Setting: 29.96 inches Hg
Type of Flight Plan Filed: None
Departure Point: Eufaula, OK
Destination: Eufaula, OK
Wreckage and Impact Information
Crew Injuries: 2 None
Aircraft Damage: Substantial
Passenger Injuries:
Aircraft Fire: None
Ground Injuries:
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 35.282795,-95.589855 (est)
Aircraft crashed in a field.
Date: 12-JUL-22
Time: 15:00:00Z
Regis#: N452VC
Aircraft Make: ZENITH
Aircraft Model: ZODIAC
Event Type: INCIDENT
Highest Injury: NONE
Aircraft Missing: No
Damage: UNKNOWN
Activity: PERSONAL
Flight Phase: EN ROUTE (ENR)
Operation: 91
City: EUFAULA
State: OKLAHOMA
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