NTSB CAROL · Event
Event ATL85LA176
Aircraft involved
Factual narrative
THE PLT REPORTED THAT DURING A DESCENT TO 2100 FT, INTERMEDIATE LEVEL OFFS WERE MADE AT 5000, 4000, & 3000 FT. HE STATED THAT AT 2200 FT, CARB HEAT WAS REMOVED & POWER WAS APPLIED FOR THE LEVEL OFF. HOWEVER, WHEN THE THROTTLE WAS ADVANCED, THE ENG BEGAN RUNNING ROUGH & WOULD NOT SUSTAIN LEVEL FLT. THE PLT STATED THAT ALL COMBINATIONS OF POWER & CARB HEAT WERE TRIED, BUT PROVIDED NO CHANGE. THE POWER LOSS OCCURRED OVER A DENSE FOREST, SO THE PLT ELECTED TO MAKE A FORCED LANDING IN A LAKE. THE ACFT SANK IN 14 FT OF WATER. IT WAS RECOVERED, BUT NO PREIMPACT PART FAILURE OR MALFUNCTION WAS VERIFIED. THE CARB HEAT CABLE WAS LOOSE, BUT THERE WAS IMPACT DAMAGE IN THAT AREA. THE TEMP & DEW POINT WERE 74 & 68 DEGS RESPECTIVELY. ACCORDING TO ICING PROBABILITY CHARTS, CARB ICING WOULD HAVE BEEN POSSIBLE IF THE CARB HEAT HAD NOT BEEN USED OR HAD NOT FUNCTIONED. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
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NTSB_1985_ATL85LA176.txt.
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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). 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 2019 · Conference Paper
Crash Testing and Simulation of a Cessna 172 Aircraft: Pitch Down Impact Onto Soft Soil
During the summer of 2015, NASA Langley Research Center conducted three full-scale crash tests of Cessna 172 (C-172) aircraft at the NASA Langley Landing and Impact Research (LandIR) Facility.
- NASA NTRS 2019 · Technical Memorandum (TM)
Simulating the Impact Response of Three Full-Scale Crash Tests of Cessna 172 Aircraft
During the summer of 2015, a series of three full-scale crash tests were performed at the Landing and Impact Research Facility located at NASA Langley Research Center of Cessna 172 aircraft.
- 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 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…
- NASA NTRS 2025 · Presentation
NASA Icing Update – March 2025
This NASA Icing Update was prepared for presentation to the SAE International AC-9C Inflight Icing Technology Committee. This update includes the following topics: planned Rotational Icing Scaling tes…
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