NTSB CAROL · Event
Event CHI92FA067
Registry · N345CC
FAA Aircraft Registry record.
Make / Model
ZENITH STOL CH 750
Year of manufacture
2021
Engine
CONT MOTOR O-200A (100 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20211228
ADS-B equipped
Yes — Mode-S A3D016
Registrant of record
BEAR MARGARET E
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
THE PILOT-IN-COMMAND'S CONTINUED FLIGHT INTO ICING CONDITIONS AND HIS FAILURE TO USE THE AIRPLANE'S ANTI-ICE/DE-ICE SYSTEM RESULTING IN A BUILD-UP OF ICE OVER THE AIRPLANE'S SURFACE AREA AND RESULTANT LOSS OF CONTROL. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE: THE AIRPLANE WAS OVER IT'S CERTIFICATED MAXIMUM GROSS WEIGHT, AND THE ICING CONDITIONS.
Factual narrative
DURING THE WX BRIEFING AT CHICAGO, THE PILOT WAS PROVIDED PILOT REPORTS OF AIRCRAFT ENCOUNTERING ICING IN THE VICINITY OF CHICAGO, WEST CHICAGO, AND SPRINGFIELD. HE WAS ALSO GIVEN THE DESTINATION SURFACE TEMP/DEWPOINT OF 33/31. WHILE BEGINNING THE APPROACH TO THE DESTINATION AIRPORT, AT AN INITIAL APPROACH ALTITUDE OF 2,400 FT, THE FRONT LEFT SEAT PILOT STATED SHE OBSERVED ICE ON THE WINDSHIELD AND WINGS. IN ADDITION, THE REAR LEFT SEAT PAX STATED THAT SHE REMEMBERS THE REAR RIGHT SEAT PAX/PILOT LOOKING AT THE WINGS WITH A FLASHLIGHT, AND RECALLED OBSERVING 'ICE CURVED OVER THE TOP OF THE WING...'. THE AIRPLANE IMPACTED THE GROUND IN AN UNCONTROLLED DESCENT. THE AIRPLANE WAS APRX 245 LBS OVER MAX GROSS WEIGHT WHEN THE ACCIDENT OCCURRED. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1992_CHI92FA067.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 (icing, loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NTSB Aircraft Accident Reports 2022 · Accident report
Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Embry-Riddle Scholarly Commons 2012 · Journal article (JAAER)
Analysis of General Aviation Instructional Loss of Control Accidents
Although student pilots spend many hours practicing maneuvers to improve airmanship and prevent accidents, almost one half of all general aviation aircraft accidents occur during flight training.
- NASA NTRS 2026 · Contractor Report (CR)
Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint
Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
This study investigates the competitive dynamics of airport pricing using U.S. airport data to validate the findings. It employs linear and nonlinear ordinary differential equation models to analyze t…
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