NTSB CAROL · Event
Event ATL05CA002
Aircraft involved
Probable cause & findings
The pilot's failure to maintain airspeed on initial take off climb resulted in an inadvertent stall and an uncontrolled descent into the ground.
Factual narrative
On October 9, 2004, at 0859 eastern daylight time, a Cessna 172K, N78211, registered to East Tennessee Pilot's Club Inc., operating as a 14 CFR Part 91 instructional flight, collided with the ground while maneuvering on initial take off climb in the vicinity of Sky Ranch Airport, Knoxville, Tennessee. Visual meteorological conditions prevailed and no flight plan was filed. The airplane received substantial damage. The student pilot reported serious injuries. The flight originated from Sky Ranch Airport, in Knoxville, Tennessee, on October 9, 2004, at 0858. A witness stated he was fishing in a boat adjacent to the Sky Ranch Airport, and observed an airplane on take off from the airport. The airplane was about 200 feet in a climb attitude. He estimated the nose of the airplane to be in a 30-degree nose high attitude and the airspeed was described as slow. The airplane made a hard turn to the left and the nose of the airplane pitched down. He then observed the airplane on the ground with the tail up in the air. He immediately called the 911 emergency operators and reported the accident. The student pilot stated during climb out, the airplane wanted to turn to the left. He applied correction and could not figure out why the airplane wanted to turn. The airplane started to turn again and he thought the airplane would hit the hanger off the left side of the runway. He lowered the nose a little and then applied aft pressure on the control yoke. The student pilot stated, "he could not remember anything after applying the rear pressure on the control yoke." When asked if he experienced any mechanical problems with the airplane or his seat, he stated no. Examination of the crash site revealed the airplane had collided with the ground in a nose down attitude and stopped against a hangar post in a nose down attitude facing the direction it had been traveling on take off. The airplane had been lowered and propped up on a sawhorse to stop a fuel leak. The left wing tip was missing and the wing was bent up and aft. The upper and lower left wing skins were twisted and compressed, and the left inboard flap was wedged into the left side of the fuselage. The right wing was accelerated forward and the right wing tip was bent upward. The right flap was damaged and had collided with a hangar post. The flight controls were connected and continuity was confirmed between the flight controls and control surfaces. The engine and propeller assembly remained attached to the airframe and no anomalies were noted. The Cessna 172 Owner's Manual states at 2,300 pounds gross weight with the flaps at 10-degrees and a 20-degree angle of bank the airplane will stall at 54 calibrated airspeed (CAS.) With a 40-degree bank the airplane will stall at 59 CAS and with a 60-degree bank the airplane will stall at 74 CAS. The student pilot stated he was on initial take off climb and the airplane wanted to turn to the left. He put in a correction and the airplane started another turn to the left. He thought the airplane might collide with a hangar off the left side of the runway so he lowered the nose and applied aft pressure on the control yoke. The student pilot stated, "he could not remember anything after applying the rear pressure on the control yoke." When asked if he experienced any mechanical problems with the airplane or his seat, he stated no. A witness stated he observed an airplane on take off from the airport. The airplane was about 200 feet in a climb attitude. He estimated the nose of the airplane to be in a 30-degree nose high attitude and the airspeed was described as slow. The airplane made a hard turn to the left and the nose of the airplane pitched down. Examination of the airplane revealed the left wing tip was missing and the wing was bent up and aft. The upper and lower left wing skins were twisted and compressed, and the left inboard flap was wedged into the left side of the fuselage. The right wing was accelerated forward and the right wing tip was bent upward. The right flap was damaged and had collided with a hangar post. The flight controls were connected and continuity was confirmed between the flight controls and control surfaces. The engine and propeller assembly remained attached to the airframe and no anomalies were noted. The Cessna 172 Owner's Manual states at 2,300 pounds gross weight with the flaps at 10-degrees and a 20-degree angle of bank the airplane will stall at 54 calibrated airspeed (CAS.) With a 40-degree bank the airplane will stall at 59 CAS and with a 60-degree bank the airplane will stall at 74 CAS. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2004_ATL05CA002.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2026 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- arXiv 2023 · arXiv preprint
Automating Bird Diverter Installation through Multi-Aerial Robots and Signal Temporal Logic Specifications
This paper tackles the task assignment and trajectory generation problem for bird diverter installation using a fleet of multi-rotors.
- arXiv 2023 · arXiv preprint
Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2023 · arXiv preprint
Polycrystallinity enhances stress build-up around ice
Damage caused by freezing wet, porous materials is a widespread problem, but is hard to predict or control. Here, we show that polycrystallinity makes a great difference to the stress build-up process…
- arXiv 2022 · arXiv preprint
Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- Embry-Riddle Scholarly Commons 2021 · Journal article (JAAER)
Analysis on the Negative Emotional, Physiological, and Cognitive Responses Elicited from of the Activation of a Stall Alarm
Failing to identify an aerodynamic stall can lead to the inability of an aircraft to sustain flight. To warn pilots of an impending or fully-developed stall, many aircraft have safety devices installe…
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