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ASN Wikibase Occurrence # 220629
Last updated: 19 October 2020
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Date:07-JAN-2019
Time:13:34
Type:Silhouette image of generic BL17 model; specific model in this crash may look slightly different
Bellanca 17-30A Super Viking
Owner/operator:Private
Registration: N8849V
C/n / msn: 30376
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Hamilton County, Chickamauga Lake, Soddy-Daisy, TN -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Private
Departure airport:Chattanooga, TN (1A0)
Destination airport:Chattanooga, TN (1A0)
Investigating agency: NTSB
Narrative:
A witness saw the airplane fly over a lake and noted that the airplane made "a tight U-turn" at a low altitude, which he thought might have been an aerobatic maneuver. The airplane then spiraled straight down counterclockwise and impacted the lake. Video from a camera mounted to the airplane's right horizontal stabilizer confirmed that the airplane flew very low over water. Subsequent video showed that the airplane pitched up, rolled to the left, and entered a left spin before descending and impacting the lake. It is likely that the pilot had attempted a left wingover maneuver (in which the airplane makes a steep climb followed by a vertical turn and subsequent descent), but the airplane experienced an aerodynamic stall that led to the left spin near the top of the maneuver. The video revealed no evidence of a preimpact structural failure, flight control malfunction, or loss of propeller rpm. Additionally, postaccident examination of the airframe and engine revealed no preimpact mechanical malfunctions that would have precluded normal operation.

The pilot's toxicology results indicated that he had previously taken some cough and cold medications, including some that were potentially sedating. However, these medications were out of his system, as shown by the absence or low levels of these medications in the pilot's blood. Thus, the pilot's use of these medications was not likely a factor in this accident.

Probable Cause: The pilot's improper decision to attempt an aerobatic maneuver at low altitude, which led to an aerodynamic stall and spin from which the pilot could not recover.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20190107X55813&key=1
FAA register: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=8849V

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 3 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
07-Jan-2019 22:00 Geno Added
08-Jan-2019 00:11 Geno Updated [Aircraft type, Registration, Cn, Operator, Other fatalities, Phase, Source]
11-Jan-2019 06:13 gerard57 Updated [Total fatalities, Total occupants, Source, Damage, Narrative]
11-Jan-2019 07:56 gerard57 Updated [Source]
15-Jan-2019 06:19 RobertMB Updated [Source]
22-Apr-2020 17:01 ASN Update Bot Updated [Time, Nature, Departure airport, Destination airport, Source, Narrative, Accident report, ]

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