Mitsubishi MU2B near Big Piney, WY — 2019-12-30
- Date
- 2019-12-30
- Location
- Big Piney, WY, USA
- Airport
- BPI
- Aircraft
- Mitsubishi MU2B
- Registration
- N43866
- Category
- Airplane
- Highest injury
- None
- Fatalities
- 0
- Phase of flight
- Landing
Probable cause
The failure of the right propeller position to correspond to the throttle change when moved to the beta position for reasons that could not be determined based on available evidence.
NTSB narrative
The pilot reported that the approach and landing flare were normal; however, as he moved both throttles to the beta position, it appeared that the left propeller went into the beta position while the right one did not. This resulted in a course deviation and runway excursion to the left, which led to the separation of the right main landing gear and substantial damage to the right wing. The National Transportation Safety Board was unable to conduct a follow-up examination, as the airplane has been sold and a chain of custody had been compromised. As a direct result of the airplane not being able to be examined, the cause of the right propeller failure to correspond to the throttle movement to the beta position is undetermined.
Analysis
- Primary failure mode
- Mechanical failure
- First missed decision gate
- Pilot could have aborted landing when noticing propeller issue.
NTSB coding
Evidence available
- Photos
- 3 docket documents