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ASN Wikibase Occurrence # 178097
Last updated: 1 January 2020
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Date:27-JUL-2015
Time:17:24
Type:Silhouette image of generic BE35 model; specific model in this crash may look slightly different
Beechcraft M35 Bonanza
Owner/operator:St. Croix Bonaza Association LLC
Registration: N9CB
C/n / msn: D-6231
Fatalities:Fatalities: 4 / Occupants: 4
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Polk County east of Alden Township near Amery, WI -   United States of America
Phase: Initial climb
Nature:Private
Departure airport:New Richmond, WI (KRNH)
Destination airport:Webster, WI (9WN2)
Investigating agency: NTSB
Narrative:
The private pilot departed for a personal flight with three passengers in a single-engine airplane near its maximum takeoff weight. About 7 miles northeast of the departure airport, several witnesses noticed the airplane maneuvering. One witness described the airplane in a steep climb, then “making a circle, and then twisting” before dropping nose down and disappearing behind a tree line. Another witness reported seeing the airplane in a nose-down attitude with its wings rocking back and forth. Three other witnesses noticed the airplane spinning before impact. The airplane impacted an open wheat field with a nose-down attitude and low forward velocity, consistent with an aerodynamic stall. Examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.


Probable Cause: The pilot’s loss of airplane control while maneuvering with the airplane near its maximum gross weight, which resulted in the airplane exceeding its critical angle-of-attack and entering an aerodynamic stall.


Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20150727X95755&key=1
FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=9CB


Revision history:

Date/timeContributorUpdates
28-Jul-2015 06:09 Geno Added
28-Jul-2015 06:15 Geno Updated [Time, Aircraft type, Source]
28-Jul-2015 14:59 Geno Updated [Registration, Cn, Operator, Phase, Source, Narrative]
12-Aug-2015 01:18 Geno Updated [Location, Phase, Nature, Departure airport, Destination airport, Source]
21-Dec-2016 19:30 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
01-Dec-2017 15:03 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative]

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