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ASN Wikibase Occurrence # 34706
Last updated: 7 September 2021
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Type:Silhouette image of generic BE55 model; specific model in this crash may look slightly different
Beechcraft 55 Baron
Registration: N4088A
MSN: TE-793
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Cedarville, CA -   United States of America
Phase: En route
Departure airport:Everrett, WA (PAE)
Destination airport:North Las Vegas, NV (VGT)
Investigating agency: NTSB
The pilot was operating on a VFR on top IFR clearance when he inadvertently encountered a mountain wave condition while flying in a dark moonless night. The radar data showed that the airplane began a 612 FPM descent for 1,000 feet and then abruptly climbed 300 feet before the airplane's transponder code disappeared from the sector controllers radar screen. The pilot did not make any radio transmissions during the accident sequence of events. The airplane crashed in a vertical nose-down attitude into a lake and was buried about 20 feet in the muddy silt terrain. The wreckage examination disclosed no evidence of an in-flight breakup or any preexisting airplane malfunctions or failures. CAUSE: the pilot's poor preflight planning by not obtaining a weather briefing and his inadvertent encounter with a mountain wave condition. The moonless dark night was a factor in this accident.



Revision history:

24-Oct-2008 10:30 ASN archive Added

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