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ASN Wikibase Occurrence # 190702
Last updated: 2 December 2020
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Date:16-OCT-2016
Time:14:30
Type:Silhouette image of generic C150 model; specific model in this crash may look slightly different
Cessna 150F
Owner/operator:Private
Registration: N7948F
C/n / msn: 15064048
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Henry County, Stockbridge, GA -   United States of America
Phase: Take off
Nature:Private
Departure airport:Stockbridge, GA (7GA7)
Destination airport:Canton, GA (KCNI)
Investigating agency: NTSB
Narrative:
The private pilot completed an engine run-up before the personal flight with no anomalies noted. The pilot rotated the airplane about halfway down the runway. He stated that the airplane was not climbing normally during the takeoff, and a ground witness heard the engine making “popping” noises. The pilot attempted to clear trees off the end of the runway in order to make a controlled landing in the field on the other side, but the airplane impacted the field; the pilot was unable to recall any events that happened after passing over a tree. Examination of the wreckage revealed that the airplane displayed impact damage that included aftward crushing of the airplane's nose and the leading edges of both wings, which was consistent with an aerodynamic stall and impact with the ground in a nose-low attitude. Examination of the engine revealed the No. 4 cylinder's exhaust valve was stuck in the fully open position and coated in a carbon-like material. The stuck valve likely reduced engine power and airplane performance during the takeoff, which resulted in an aerodynamic stall.

Probable Cause: A partial loss of engine power due to a stuck exhaust valve and the pilot's exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall. 

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20161016X51930&key=1

FAA register: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=7948F

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 3 years and 6 months
Download report: Final report
Location

Media:


Images:


Photo: FAA

Revision history:

Date/timeContributorUpdates
16-Oct-2016 22:17 Geno Added
17-Oct-2016 09:13 Iceman 29 Updated [Embed code, Narrative]
25-Oct-2016 23:50 Geno Updated [Aircraft type, Registration, Cn, Operator, Nature, Source, Damage, Narrative]
19-Apr-2020 06:59 ASN Update Bot Updated [Nature, Departure airport, Destination airport, Source, Narrative, Accident report, ]
19-Apr-2020 07:29 harro Updated [Destination airport, Source, Narrative, Photo, Accident report, ]

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