ASN Wikibase Occurrence # 237327
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Wednesday 24 June 2020 |
| Time: | 11:45 LT |
| Type: | Thatcher CX4 |
| Owner/operator: | Private |
| Registration: | N274DR |
| MSN: | 122 |
| Year of manufacture: | 2017 |
| Engine model: | Hummel VW 2400CC |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cable Airport (CCB/KCCB), Upland, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Upland-Cable Airport, CA (CCB/KCCB) |
| Upland, CA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while returning to the airport after an uneventful flight, the propeller separated from the engine, which resulted in the windscreen and canopy being covered with oil and restricting forward visibility. The pilot continued toward the airport; however, as the airplane crossed the threshold of the runway, he noted that he was going way too fast as he was attempting to keep the airplane aligned with the runway. Subsequently, the airplane touched down near the departure end of the runway, bounced, and impacted the ground.
Postaccident examination of the airplane revealed substantial damage to the fuselage and both wings. The propeller assembly and a portion of the engine crankshaft was separated and not located.
Examination of the remaining portion of the crankshaft revealed that two fractures initiated at the termination of a square keyway slot in the crankshaft. The presence of ratchet marks at the fracture origins and the presence of progressions marks along the fracture path were indicative of fatigue fracture initiation and growth.
Probable Cause: The inflight separation of the propeller assembly due to a fatigue fracture of the crankshaft. Contributing to the accident was the pilot's restricted visibility during landing, which resulted in an excessive approach speed, a long landing, and subsequent impact with terrain.
Accident investigation:
 |
|
Sources:
NTSB WPR20LA193
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=274DR
Location
Media:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Jun-2020 23:32 | Captain Adam | Added |
| 24-Jun-2020 23:59 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Destination airport, Source, Damage, Narrative] |
| 27-Jun-2020 08:39 | Iceman 29 | Updated [Source, Embed code] |
| 04-Jul-2020 09:52 | harro | Updated [Embed code, Narrative] |
| 03-Jul-2022 05:43 | ASN Update Bot | Updated [Time, Other fatalities, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation