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ASN Wikibase Occurrence # 150552
Last updated: 5 October 2020
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Type:Silhouette image of generic C172 model; specific model in this crash may look slightly different
Cessna 172M Skyhawk
Registration: N21391
C/n / msn: 17263943
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Location:Southeast corner of Almond and Elm avenues in Patterson, CA -   United States of America
Phase: En route
Departure airport:Modesto, CA (KMOD)
Destination airport:Modesto, CA (KMOD)
Investigating agency: NTSB
During a photography mission, the pilot applied full engine power, and the engine speed dropped to idle. After attempting a series of troubleshooting steps, the engine did not respond, and the pilot performed a forced landing into a field. The airplane landed hard and nosed over. Postaccident examination of the engine revealed that the outer jacket of the throttle control cable had fragmented at the carburetor attach point, exposing the inner cable. Subsequent throttle control movement resulted in the cable flexing out of the jacket, rather than moving the throttle control arm at the carburetor. No life limit existed for the cable, which was most likely installed at the time of airframe manufacture, 38 years prior to the accident. Further examination of the engine revealed no additional evidence of a mechanical malfunction or failure that would have precluded normal operation.
Probable Cause: Failure of the throttle control cable during maneuvering flight, which resulted in a partial loss of engine power.



Revision history:

06-Nov-2012 12:53 gerard57 Added
06-Nov-2012 12:54 gerard57 Updated [Location]
06-Nov-2012 12:55 gerard57 Updated [Damage]
07-Nov-2012 06:29 RobertMB Updated [Aircraft type, Cn, Location, Departure airport, Narrative]
07-Nov-2012 09:54 Geno Updated [Time, Nature, Source, Narrative]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
28-Nov-2017 13:54 ASN Update Bot Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative]

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