NTSB CAROL · Event
Event ERA18LA110
Aircraft involved
Probable cause & findings
A substantial oil leak, which resulted in a partial loss of engine power and failure of the No. 2 connecting rod.
Factual narrative
On March 17, 2018, about 1424 eastern daylight time, an experimental amateur-built Skybolt, N27265, was destroyed following a forced landing near Punta Gorda, Florida. The commercial pilot had minor injuries. The airplane was owned and operated by the pilot under the provisions of 14 Code of Federal Regulations part 91 as a personal flight. Day, visual meteorological conditions prevailed, and no flight plan was filed for local flight that originated at Punta Gorda Airport (PGD), Punta Gorda, Florida, about 1330.The pilot reported that the Lycoming O-360 series engine that was installed on the aerobatic biplane had just been overhauled and he was flying in the local area as part of a 10-hr break-in period. This was the first flight following the overhaul. The preflight inspection and ground operations were normal. There were no signs of oil leaks during the preflight inspection. About 35 minutes into the flight, oil appeared on both windscreens, blocking forward visibility. The windscreens eventually became completely covered with oil. He called tower personnel, alerting them to the problem and was cleared to land on runway 22. The engine lost power; however, it continued to run under partial power. Tower personnel reported smoke coming from the engine. Unable to make runway 22, he elected to land the airplane in a field. After landing, the airplane collided with a ditch and came to a stop. The engine caught fire and the pilot egressed the airplane. An inspector with the Federal Aviation Administration responded to the accident site and examined the wreckage. Fire consumed the entire airframe except for the outboard sections of the right wings. The engine was examined and a hole was observed in the top of the crankcase, adjacent to the no. 2 cylinder. Following the recovery of the wreckage, the engine was examined by an NTSB air safety investigator. The engine remained attached to the engine mount, and the engine mount was attached to the firewall. All sections and components of the engine were exposed to postcrash heat and fire. The oil filter was secure and the safety wire was installed and in place. All accessories on the aft section of the engine were fire-damaged. All surfaces were dry and no residual oil was present. All lines and hoses were burned or melted. The carburetor was separated from impact forces. A rectangular-shaped hole was evident on the top of the engine case, adjacent to the no. 2 cylinder. The area around the hole was dry and there was no residual oil observed. Visual examination inside the case hole revealed the no. 2 connecting rod was fractured at the crankshaft. There was no residual oil on the components; however, the entire area was exposed to postcrash heat and fire. The other connecting rods were attached to the crankshaft. The commercial pilot was flying the airplane on the first flight of a 10-hour break-in period after an engine overhaul. The preflight inspection and ground operations were normal, with no signs of oil leaks. About 35 minutes into the flight, oil appeared on both windscreens, blocking the pilot’s forward visibility; the windscreens eventually became completely covered with oil. The pilot contacted tower personnel, who cleared him to land. The engine then lost partial power. Tower personnel reported smoke coming from the engine. Unable to make the runway, the pilot chose to land the airplane in a field. After landing, the airplane collided with a ditch and came to rest. The engine caught fire, and the pilot egressed the airplane. A postcrash fire consumed most of the wreckage. Examination of the engine revealed a large hole in the top of the engine case adjacent to the No. 2 cylinder. The No. 2 connecting rod was fractured at the crankshaft. The connecting rod failure was likely the result of oil starvation to the crankshaft. Extensive postcrash fire damage to the engine, hoses, and accessories prevented investigators from determining the source of the oil leak. 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-Fluids/misc hardware-Fluids-Oil-Fluid level - C
- C Aircraft-Aircraft power plant-Engine (reciprocating)-Recip eng oil sys-Malfunction - C
- C Aircraft-Aircraft power plant-Engine (reciprocating)-Recip engine power section-Failure - C
- — Environmental issues-Physical environment-Terrain-(general)-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2018_ERA18LA110.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…
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