Probable cause
The pilot's improper installation of the propeller hub to the engine crankshaft, which resulted in a loss of engine thrust.
NTSB analysis
The pilot/builder of the experimental airplane was in cruise flight when the engine experienced a sudden increase in rpm with a corresponding loss of thrust. The pilot subsequently performed a forced landing to a highway. During the landing roll, the right wing struck a tree and sustained substantial damage. Examination of the airplane revealed that the propeller assembly rotated without any corresponding engine crankshaft movement. The castellated nut and washer which secured the propeller hub flange to the engine crankshaft were found scored and warped. The propeller assembly had been installed on the non-certificated engine by the pilot approximately 35 hours prior the accident. The pilot did not possess the proper manufacturer technical data and tooling necessary to remove and reinstall the propeller hub assembly on the engine.
Text from the NTSB. Open the NTSB docket for ERA10LA400 for the full record.
Event
- Date
- Aug 5, 2010
- Type
- Accident
- Place
- Hollywood, Maryland
- Nearest airport
- St. Mary'S County Regional (2W6)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Amateur-built JD-2
- N-number
- N43015
- 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.