NTSB CAROL · Event
Event NYC93LA175
Aircraft involved
Probable cause & findings
THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.
Factual narrative
On Friday, August 27, 1993, at about 1620 eastern daylight time, an Enstrom F28A, helicopter, N269Q, piloted by Mr. Mark Lavoie, collided with the terrain during a practice autorotation at the Meriden Airport, Meriden, Connecticut. The helicopter was substantially damaged, and the pilot was not injured. Visual meteorological conditions prevailed at the time, and no flight plan had been filed. The flight was being conducted under 14 CFR 91. Maintenance had recently been performed on the helicopter, and the pilot took off for a test flight. The pilot elected to perform a practice autorotation. During this maneuver the engine lost complete power. The helicopter impacted the ground; became airborne; turned 90 degrees; and the main rotor blades struck the tail boom. According to the pilot's statement on the NTSB Form 6120.1/2: ...entered autorotation at approximately 1,000 feet MSL...all indications and aircraft operation normal...rotor RPM O.K...engine RPM "0". Engine failure verified...ground contact on aft portion of skids...loud "whack" and violent torque twist... FAA Inspector, Edwin Odell, examined the wreckage after the accident and said that fuel and oil were present. Mr. Odell said, "...no outward sign of mechanical malfunction was noted." All three fuel sumps were drained and according to Mr. Odell, "...a small amount of water was noted at the right fuel tank drain." No water was found at the left fuel tank or sump. The main rotor transmission clutch was disengaged, the engine was test run and no discrepancies were observed. DURING A MAINTENANCE TEST FLIGHT THE PILOT ELECTED TO PERFORM A PRACTICE AUTOROTATION. DURING THE MANEUVER THE ENGINE LOST COMPLETE POWER. THE HELICOPTER IMPACTED THE GROUND HARD, BECAME AIRBORNE, THE MAIN ROTOR BLADES STRUCK THE TAIL BOOM AND SEPARATED THE BOOM FROM THE FUSELAGE. A TEST RUN PERFORMED ON THE ENGINE REVEALED NO DISCREPANCIES. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1993_NYC93LA175.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 (engine failure, 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.
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