ASN Wikibase Occurrence # 183397
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Narrative:The pilot/builder was carrying out the initial flight test after recently building the amateur experimental airplane. Shortly after takeoff, the airplane's engine experienced a total power loss and the pilot initiated a descending left turn in order to avoid an airport fence. Subsequently, the airplane impacted terrain, in a nose down attitude with the left wing low.
|Date:||Sunday 10 January 2016|
|Year of manufacture:||2011|
|Total airframe hrs:||0 hours|
|Fatalities:||Fatalities: 1 / Occupants: 1|
|Aircraft damage:|| Substantial|
|Location:||Fresno Chandler Executive Airport (KFCH), Fresno, CA -
United States of America
|Phase:|| Take off|
|Departure airport:||Fresno, CA (FCH)|
|Destination airport:||Fresno, CA (FCH)|
|Investigating agency: ||NTSB|
|Confidence Rating:|| Accident investigation report completed and information captured|
An examination of the engine revealed that the Force One Main Bearing seized to the crankshaft. Further, there were multiple circular impressions on the bearing surface. Based on this evidence, it is likely that while building the experimental engine, the pilot did not properly align the Force One Main Bearing, and the oil feed hole was inadvertently used as the dowel pin hole, which resulted in a blockage of the oil transfer hole, thus preventing oil into the bearing and resulted in engine seizure and total power loss.
Probable Cause: The pilot/builder's failure to properly align the Force One Main Bearing, which resulted in a blockage of the oil transfer hole and culminated with a total engine power loss. Contributing to the accident was the pilot's failure to arrest the bank and sink rate prior to impact.
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N1950J
| || |
|Investigating agency: ||NTSB |
|Report number: ||WPR16LA050 |
|Status: ||Investigation completed|
|Duration: ||2 years |
|Download report: || Final report|
||Updated [Aircraft type, Registration, Cn, Operator, Source, Damage, Narrative]|
||ASN Update Bot
||Updated [Time, Damage, Category, Investigating agency]|
||ASN Update Bot
||Updated [Time, Total fatalities, Nature, Departure airport, Destination airport, Source, Narrative]|
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