NTSB CAROL · Event
Event DEN01LA065
Aircraft involved
Probable cause & findings
The unsuitable terrain on which to make a forced landing. A contributing factors was the carburetor icing conditions.
Factual narrative
On March 9, 2001, approximately 1645 mountain standard time, an Erco 415-C Ercoupe, N1121J, owned and operated by the pilot, was substantially damaged when it collided with terrain during a forced landing at Ivins, Utah. The private pilot, the sole occupant aboard, received minor injuries. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal flight being conducted under Title 14 CFR Part 91. The flight originated at Hurricane, Utah, approximately 1600. According to the pilot's accident report, he departed Hurricane, Utah, and was en route to St. George, Utah, with a "fly-over" at the town of Ivins, where he lived. After circling Ivins and turning towards St. George, there was an "intermittent loss of [engine] power." He suspected carburetor icing "since the Stromberg carburetor, standard [equipment] on the Ercoupe 415C, is prone to icing," and he immediately applied carburetor heat. The engine "continued a pattern of power off/power on/power off in cycles of 4 or 5 seconds." He left the carburetor heat on but soon realized that his rate of descent left insufficient altitude to arrive at St. George. He turned back towards Ivins but was forced to land on rough desert terrain. The nose and left main landing gears struck a dirt berm. The nose gear was bent back and both wings were extensively damaged. The pilot told an FAA inspector that when the engine lost power, the carburetor air temperature gauge indicated 10 degrees C. According to the Carburetor Icing Graph (see public docket), a temperature of 12 degrees C. and a dew point of 4 degrees C. [as reported by the St. George METAR (aviation routine weather report)] could result in "serious icing at glide power," and a temperature of 10 degrees C. (as reported by the pilot) could result in "serious icing at cruise power." The pilot said there was an intermittent loss of engine power during cruise flight . He suspected carburetor icing "since the Stromberg carburetor, standard [equipment] on the Ercoupe 415C, is prone to icing," and he immediately applied carburetor heat. The carburetor air temperature gauge indicated 10 degrees C. The engine "continued a pattern of power off/power on/power off in cycles of 4 or 5 seconds." He left the carburetor heat on but soon realized that his rate of descent left insufficient altitude to arrive at the destination airport. He landed on rough desert terrain, extensively damaging both wings and the nose and left main landing gears. According to the Carburetor Icing Graph, a temperature of 12 degrees C. and a dew point of 4 degrees C. [as reported by the nearest weather observation station] could result in serious icing at glide power, and a temperature of 10 degrees C. (as reported by the pilot) could result in serious icing at cruise power. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2001_DEN01LA065.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). 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 · 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…
- arXiv 2024 · arXiv preprint
An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated ana…
- NASA NTRS 2024 · Presentation
NASA Icing Update – Oct 2024
This presentation provides a status update on select NASA icing research activities for the SAE AC-9C Icing Technical Committee Meeting on Oct 21, 2024.
Browse the full corpus — academia portal ↗