NTSB CAROL · Event
Event CEN11LA490
Aircraft involved
Probable cause & findings
The loss of engine power during the descent for reasons that could not be determined because a thorough examination of the engine could not be completed due to the remote accident site.
Factual narrative
***This report was modified on March 19, 2013. Please see the docket for this accident to view the original report.*** On July 13, 2011, at 1147 mountain daylight time, a Darron Stephen AL-6, amateur built single engine airplane, N61262, experienced a complete loss of engine power while descending to land at Meadow Lake Airport (FLY), Peyton, Colorado. The pilot made a forced landing to an open field and the airplane was substantially damaged. The airplane was registered to and operated by the pilot under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed and no flight plan was filed. The pilot, who was the sole occupant, was not injured. The flight originated from San Luis Valley Regional Airport (ALS), Alamosa, Colorado, about 1030. The pilot reported that during descent he recognized that the engine was not providing power and the propeller was simply windmilling. He was unable to restart the engine. During the emergency off-airport landing one wheel went into a low spot in the ground and both main landing gear legs collapsed and partially separated from the fuselage. The airplane continued moving across the ground and came to rest upright. The impacts resulted in the collapse of the main landing gear legs and substantial damage to the lower fuselage. An examination discovered there was more than 20 gallons of fuel on-board the airplane. On a previous instructional flight, with a certified flight instructor on-board, the engine appeared to be surging while in flight. At the conclusion of that flight, the engine would not shut off after bringing the mixture control to idle cut-off and the engine had to be stopped by turning off the magnetos. Following that incident the fuel mixture control was removed, repaired, and reinstalled. The reinstallation of the repaired component on the accident airplane was not done by a person certificated by the Federal Aviation Administration as a repairman or a mechanic. On two different flights following the reinstallation of the fuel mixture control the pilot reported that the engine quit during a landing ground roll when the throttle was brought to the idle position. The pilot did not report that he addressed that problem before he next flew the airplane. A postaccident examination by a Federal Aviation Administration inspector discovered there was more than 20 gallons of fuel remaining onboard the airplane. Due to the remote location of the accident, the airplane’s engine was not further examined. The pilot reported that the engine lost power during the descent to land. The pilot was unable to restart the engine and could not reach the destination airport, so he performed a forced landing in a nearby field. About 20 gallons of fuel was drained from the airplane’s fuel tanks after the forced landing. The pilot described a history of recent fuel mixture control problems. He stated that during a previous flight, the airplane’s engine appeared to be surging and did not shut down normally when he brought the mixture control to its idle cut-off position. After that incident, the pilot removed the airplane’s fuel mixture control, had it repaired, and then reinstalled it on the airplane. The pilot stated that after he reinstalled the fuel mixture control, he experienced two additional unexplained losses of engine power, but he continued to operate the airplane. Although it is possible that the fuel mixture control reinstallation was not properly done, it was not possible to determine the reason for the loss of engine power because the engine and its systems were not examined due to the remote location of the accident site. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- C Aircraft-Aircraft power plant-Engine (reciprocating)-(general)-Malfunction - C
- C Not determined-Not determined-(general)-(general)-Unknown/Not determined - C
Verbatim from NTSB's published report. Source file
NTSB_2011_CEN11LA490.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…
Browse the full corpus — academia portal ↗