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ASN Wikibase Occurrence # 197083
Last updated: 6 October 2020
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Date:01-AUG-2017
Time:15:15
Type:Silhouette image of generic C150 model; specific model in this crash may look slightly different
Cessna 150F
Owner/operator:Private
Registration: N8879S
C/n / msn: 15062179
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Cherokee County north of Mount Selman, TX -   United States of America
Phase: Take off
Nature:Training
Departure airport:Tyler, TX (TYR)
Destination airport:Tyler, TX (TYR)
Investigating agency: NTSB
Narrative:
Following a full-stop landing and a back taxi to the runway, the flight instructor and a student pilot planned to conduct a soft-field takeoff to prepare the student for his private pilot test flight. Although there were no witnesses to the takeoff, an automobile dash camera video showed the airplane flying just above tree tops and then entering a right turn. During the turn, the left wing and the nose of the airplane dropped, which was consistent with a stall and an initial spin. The airplane then descended and impacted the ground. The available evidence did not indicate which pilot was flying the airplane at the time of the accident, but it is likely that the student pilot was flying at the time.

Postaccident examination of the airplane and engine revealed no anomalies that would have precluded normal operation. The carburetor heat control was found in the off position, which was the correct position for takeoff. The temperature and dew point at the time of the accident were in a range of susceptibility for moderate icing at cruise power settings and serious icing at descent power settings. Although the airplane was at takeoff power when the accident occurred, a partial loss of engine power likely occurred due to carburetor icing, which might have accumulated while the airplane was operating at a lower power setting on the ground before the accident takeoff. The partial loss of engine power resulted in reduced airplane performance and the pilot's inability to maintain adequate airspeed, which then resulted in an exceedance of the airplane's critical angle-of-attack and a subsequent aerodynamic stall.

Probable Cause: The partial loss of engine power due to carburetor icing and the pilot's inability to maintain adequate airspeed during the soft-field takeoff, which resulted in an exceedance of the airplane's critical angle-of-attack and an aerodynamic stall.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20170803X93923&key=1

FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N8879S

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 4 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
01-Aug-2017 23:10 Geno Added
02-Aug-2017 06:02 Iceman 29 Updated [Time, Source, Embed code]
03-Aug-2017 07:12 Iceman 29 Updated [Embed code]
22-Dec-2018 20:28 ASN Update Bot Updated [Time, Operator, Departure airport, Destination airport, Source, Embed code, Narrative, Accident report, ]
22-Dec-2018 20:33 harro Updated [Source, Embed code, Narrative]

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