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ASN Wikibase Occurrence # 176616
Last updated: 11 June 2020
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Type:Silhouette image of generic M20T model; specific model in this crash may look slightly different
Mooney M20K 231
Registration: N3567H
C/n / msn: 25-0423
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Substantial
Location:Fresno Chandler Executive Airport (KFCH), Fresno, CA -   United States of America
Phase: Landing
Departure airport:Shafter, CA (MIT)
Destination airport:Sacramento, CA (MCC)
Investigating agency: NTSB
The private pilot was conducting a personal cross-country flight. During cruise, the engine experienced a catastrophic failure and a total loss of power. The pilot performed a forced landing to an airport, landed long, and collided with an airport fence. Postaccident examination of the engine revealed internal damage consistent with the initial failure of the No. 1 piston and connecting rod assembly, most likely at the piston end, which caused a cascading failure of the adjacent piston and rod assemblies. Damage to the engine components precluded an accurate assessment of the specific initiating event, and evidence suggested that the engine contained oil at the time of the failure.

The engine had been involved in a propeller strike accident about 310 flight hours prior, which required an engine teardown, examination, and replacement of two connecting rods and one piston pin. Maintenance records did not disclose which rods were replaced. Following the repair, the engine went through a 10-year period of inactivity, during which time internal corrosion occurred. No precautionary steps were taken to monitor the effects of the corrosion, such as oil filter examination or oil analysis. The extent to which the corrosion contributed to the failure of the No. 1 piston and connecting rod assembly could not be determined.
Probable Cause: A total loss of engine power during cruise flight due to a failure of the No. 1 piston and connecting rod assembly.


FAA register:

Revision history:

03-Jun-2015 15:05 Geno Added
21-Dec-2016 19:30 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
19-Aug-2017 13:53 ASN Update Bot Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative]

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