Probable cause
The pilot's improper installation of a spark plug, which led to a partial loss of engine power after takeoff and the resultant forced landing.
NTSB analysis
The airplane experienced a partial loss of engine power shortly after takeoff, and the pilot performed a forced landing to a field. Postaccident examination of the engine revealed that a spark plug that the pilot installed about 2 flight hours before the accident had loosened and separated from its cylinder during the accident takeoff. The pilot stated that the accident could have been prevented if the spark plugs were tightened and rechecked when they were installed.
Text from the NTSB. Open the NTSB docket for CEN12LA577 for the full record.
Event
- Date
- Aug 19, 2012
- Type
- Accident
- Place
- Rockford, Illinois
- Nearest airport
- Cottonwood Airport (1C8)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Amateur-built Kitfox III
- N-number
- N942EJ
- Category
- Airplane
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Personal
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.