NTSB CAROL · Event
Event CHI93LA325
Aircraft involved
Probable cause & findings
the loss of engine power due to an exhaust valve failure. A factor related to the accident is the power line.
Factual narrative
On August 17, 1993, about 1645 central daylight time, a Cessna 152, N47716, sustained substantial damage during a forced landing near the Keokuk Municipal Airport, Keokuk, Iowa, following a loss of engine power. The student pilot was not injured. The local student solo training flight was operating without a flight plan in visual meteorological conditions. The student pilot reported the engine began to lose power and run rough during the initial climb following a touch-and-go landing. During the forced landing the student said he pulled the airplane up to avoid two power lines, and the airplane stalled and crashed. The engine was examined by an FAA Airworthiness Inspector. He found the exhaust valve in the #1 cylinder had broken, and there were two holes in the top of the cylinder. The student pilot was in the traffic pattern practicing touch- and-go landings. During the climb after a touch-and-go the engine began to run rough and lose power. The student attempted to make a forced landing in a field which was ahead of him. He pulled the airplane up to avoid two power lines which were in his path, and the airplane stalled and crashed. Postaccident inspection discovered a fractured exhaust valve in the number one cylinder. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1993_CHI93LA325.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing, 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.
- 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 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…
- NASA NTRS 2019 · Contractor Report (CR)
An Evaluation of an Analytical Simulation of an Airplane with Tailplane Icing by Comparison to Flight Data
This report presents the assessment of an analytical tool developed as part of the NASA/FAA Tailplane Icing Program. The analytical tool is a specialized simulation program called TAILSM4 which was de…
- NASA NTRS 2019 · Technical Publication (TP)
NASA/FAA Tailplane Icing Program: Flight Test Report
This report presents results from research flights that explored the characteristics of an ice-contaminated tailplane using various simulated ice shapes attached to the leading edge of the horizontal …
- NASA NTRS 2019 · Other
[Tail Plane Icing]
The Aviation Safety Program initiated by NASA in 1997 has put greater emphasis in safety related research activities. Ice-contaminated-tailplane stall (ICTS) has been identified by the NASA Lewis Icin…
- Embry-Riddle Scholarly Commons 2019 · Journal article (IJAAA)
Airport Policing in Pakistan: Structure, Training, and Issue
Airports are strategically and economically important installations of any country. Airports are the gateway of any country and any incidents at these gateways may harm the very aspects of a country i…
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