NTSB CAROL · Event
Event CEN18LA269
Aircraft involved
Probable cause & findings
A total loss of engine power for reasons that could not be determined based on the available evidence.
Factual narrative
On July 15, 2018, about 1745 eastern daylight time, a Bell 47J helicopter, N8568F, was destroyed during a hard landing and a postimpact fire following a loss of engine power near the Franklin Flying Field Airport (3FK), Franklin, Indiana. The pilot was seriously injured. The helicopter was registered to Brown County Tours and operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. Day visual meteorological conditions prevailed, and the flight was not operated on a flight plan. The local flight originated from 3FK about 1730.The pilot reported that the helicopter had not been flown since 2014 and was being test flown in conjunction with an annual inspection prior to return to service. He stated that the engine lost power about 50 ft above ground level, resulting in a hard landing, and a postimpact fire. A witness reported that the pilot was checking out the helicopter because it had not been flown yet this season. The initial flight was completed without incident and, after the helicopter was fueled, the pilot took off again. The witness did not see the entire flight, but he could hear the helicopter and the engine sounded "smooth." He observed the helicopter flying over the fields north of the airport and subsequently noticed a "plume of white or grey smoke trailing the helicopter." The helicopter subsequently descended into the field. The helicopter came to rest upright. The aft portion of the tail boom, including the tail rotor assembly, separated and was located about 30 ft from the main wreckage. The main rotor blades remained attached to the hub and were located with the main wreckage. A postimpact fire consumed most of the fuselage structure. The engine sustained thermal damage consistent with the fire. A postaccident examination conducted by a Federal Aviation Administration inspector did not reveal any anomalies consistent with a preimpact failure or malfunction. However, the engine examination was limited by the postimpact fire damage. Although the helicopter had not been flown since 2014, maintenance records revealed that annual inspections were completed during that time with the most recent inspection being completed in April 2017. At the time of the accident, an annual inspection was in progress but had not been completed. The commercial pilot was conducting a test flight in conjunction with an annual inspection when the engine lost power about 50 ft above ground level, which resulted in a hard landing. The helicopter was destroyed by a postimpact fire. A witness reported a plume of smoke trailing the helicopter shortly before the accident. Before the day of the accident, the helicopter had not been flown for about 4 years. A postaccident examination of the helicopter revealed no evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation, although the engine examination was limited by the postimpact fire damage. Thus, the reason for the loss of engine power could not be determined. 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 Not determined-Not determined-(general)-(general)-Unknown/Not determined - C
Verbatim from NTSB's published report. Source file
NTSB_2018_CEN18LA269.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 (maintenance). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2026 · Journal article (IJAAA)
From Reactive to Predictive: A hybrid Trust-Mediated Adoption Framework for Data-Driven Maintenance in Distributed-Authority Aviation Environments
Modern aviation maintenance operates within increasingly data-intensive technological environments, yet the operational integration of predictive maintenance into routine decision-making remains incon…
- Semantic Scholar 2025 · Article (Applied Sciences)
Decision-Making Framework for Aviation Safety in Predictive Maintenance Strategies
The implementation of predictive maintenance (PM) in aviation presents unique challenges due to strict safety requirements, complex operational environments, and regulatory constraints.
- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER)
Low-Resource Automatic Speech Recognition Domain Adaptation – A Case-Study in Aviation Maintenance
With timeliness and efficiency being critical in the aviation maintenance industry, the need has been growing for smart technological solutions that optimize and streamline the different underlying ta…
- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER)
A New Trajectory in UAV Safety: Leveraging Reinforcement Learning for Distance Maintenance Under Wind Variations
In the field of aviation, safety is a critical cornerstone, and the operation of Unmanned Aerial Vehicle (UAV) systems is deeply connected with this principle.
- Embry-Riddle Scholarly Commons 2024 · Journal article (IJAAA)
Just Culture in Aviation: A Metaphorical Study on Aircraft Maintenance Students
Just Culture, a sub-dimension of safety culture, has been a prominent and debated topic in aviation safety in recent years.
- Embry-Riddle Scholarly Commons 2024 · Journal article (IJAAA)
Performance PRISM: A Comprehensive Framework For Performance Measurement In Aircraft Maintenance
Aircraft maintenance is governed by rigorous safety requirements and high operational complexity, demanding robust performance measurement frameworks to ensure optimal maintenance practices.
Browse the full corpus — academia portal ↗