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ASN Wikibase Occurrence # 45046
Last updated: 20 August 2020
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Type:Silhouette image of generic C340 model; specific model in this crash may look slightly different
Cessna 340A
Registration: N340P
C/n / msn: 340A-0507
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Scappoose, OR -   United States of America
Phase: Approach
Departure airport:Red Bluff, CA (RBL)
Destination airport:
Investigating agency: NTSB
Witnesses first observed the aircraft on final approach for landing, with the engine(s) making a backfiring sound. While the aircraft was on short final, another aircraft pulled onto the runway and initiated its takeoff roll. The accident aircraft was observed to initiate a go-around, but did not appear to be gaining altitude and was at what the witnesses thought was a slow airspeed. About mid-field, the accident aircraft made an approximate 45 degree turn from runway heading. Within 1/4 mile from the runway, the aircraft lost altitude. The witness stated that the aircraft was about 80 feet agl when the aircraft stalled, rolled inverted (left wing down) and collided with the flat open terrain in a nose low attitude. A post-crash fire subsequently consumed the wreckage. During the post-crash inspection of the engines, it was found that both engines displayed signs of operating at a lean mixture setting. The left engine pistons and spark plugs displayed a more serious lean condition than the right side and displayed the early signs of detonation on the piston heads. No other mechanical failure or malfunction was noted to either the engines or airframe.
Probable Cause: The pilot's failure to maintain airspeed while maneuvering. An inadvertent stall, the pilot's failure to follow engine operation procedures and engine detonation were factors.



Revision history:

28-Oct-2008 00:45 ASN archive Added
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
08-Dec-2017 20:00 ASN Update Bot Updated [Destination airport, Source, Narrative]

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