NTSB CAROL · Event
Event MIA99LA173
Aircraft involved
Probable cause & findings
A loss of propeller governor control due to oil contamination.
Factual narrative
On June 12, 1999, about 1025 eastern daylight time, a Cessna 182R, N6126E, registered to R and R Aircraft Sales, operating as a Title 14 CFR Part 91 instructional flight, crashed on takeoff from Gatlinburg-Pigeon Forge Airport, Sevierville,Tennessee. Visual meteorological conditions prevailed and no flight plan was filed. The aircraft sustained substantial damage and the student pilot, the sole occupant, received minor injuries. The flight originated 25 minutes before the accident. According to the pilot, he was conducting full-stop landings, and on his second takeoff, at about 300 feet agl, the engine or propeller "just quit pulling". He applied carburetor heat with no improvement and when he realized power available would not sustain level flight, he felt his only option was to attempt a forced landing in a field. According to an FAA inspector, the pilot described the airplane's power response before the crash as, "..like an automobile automatic transmission slipping". Postcrash inspection revealed the airframe's flight controls were intact and functional. The engine's six cylinders had ignition spark and compression, and the drive train was intact. The carburetor contained uncontaminated 100 LL octane fuel. One propeller blade was bent rearward about 20 degrees from the hub and the other blade was straight, but broken loose in the hub. The propeller governor was removed and shipped to the factory for inspection and testing. Factory disassembly inspection of the propeller governor, model No. C290D3-F/T14, serial No. 821368, revealed heavy sludge in the ports used to channel oil to the propeller. Dirty oil was found in the head assembly cup, and heavy sludge was found to prevent the flyweight components from moving freely. The governor components were cleaned up, reassembled, and although the flyweight assembly had not been changed per factory service bulletin, it functionally tested satisfactorily and met current specifications. The factory conclusions pertaining to the operation of the governor were, "[The factory] could find nothing that mechanically could cause any problems during operation of the aircraft. An area of concern is the amount of sludge and condition of the oil which could cause erratic operation. Judging from the condition of the unit, [the factory] does not believe the owner has given much consideration to a regular maintenance of the system". The factory report is included in this report. The student pilot stated the power response on his second takeoff felt like, 'an automobile automatic transmission slipping'. The propeller seemed to take a 'bite' followed by 'losing bite', and when the pilot realized that the power available would not sustain level flight, he attempted a forced landing on a field. Postcrash examination by FAA inspectors revealed no abnormalities of the airframe or engine. The propeller governor was shipped to the manufacturer. Disassembly inspection of the governor revealed enough sludge to impede free movement of the flyweight assembly. Once cleaned and reassembled, the governor operated satisfactorily and met factory specifications. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1999_MIA99LA173.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.
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