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ASN Wikibase Occurrence # 162435
This record has been locked for editing.

Type:Silhouette image of generic RV8 model; specific model in this crash may look slightly different
Van's RV-8
Registration: N391V
MSN: 82195
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:Near Wickenburg, AZ -   United States of America
Phase: Landing
Departure airport:Wickenburg, AZ (E25)
Destination airport:Wickenburg, AZ (E25)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The pilot reported that, during cruise flight, he felt a sustained vibration, which he thought was from the engine or propeller, and that the airplane then started to slow down. The pilot made a forced landing to the desert, and the airplane came to rest on its nose, which caused substantial damage to the airplane. A postaccident engine run and subsequent engine examination revealed no mechanical anomalies that would have precluded normal operation. The propeller examination revealed that one of the propeller pitch change pins had broken. The pinís fracture would have resulted in the sustained vibration and loss of speed reported by the pilot. A metallurgical examination of the pin revealed that it had failed due to a fatigue crack that had progressed through about 70 percent of the pin. The fatigue crack initiated at dimples that had a depth and width consistent with excessive shot peening, which likely occurred during the manufacturing process.
Probable Cause: The fatigue failure of a propeller pitch change pin due to excessive shot peening of the pinís surface during the manufacturing process.


FAA register:

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Download report: Final report

Revision history:

22-Nov-2013 01:39 Geno Added
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
29-Nov-2017 09:24 ASN Update Bot Updated [Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

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