NTSB CAROL · Event
Event WPR14LA050
Registry · N60TM
FAA Aircraft Registry record.
Make / Model
STEMME GMBH & CO STEMME S 12
Year of manufacture
2025
Engine
ROTAX 914 SERIES (100 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20260121
ADS-B equipped
Yes — Mode-S A7C69B
Registrant of record
MTMC LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The failure of the left brake master cylinder seal, which rendered the left brake inoperative during landing.
Factual narrative
On November 7, 2013, about 1245 mountain standard time, a Piper PA 46-350P airplane, N60TM, sustained substantial damage when the nose gear collapsed during landing at Sky Ranch at Carefree (18AZ), Carefree, Arizona. The airplane was registered to Thermo Dynamics Inc., Laughlin, Nevada, and was operated by the pilot as an instrument flight rules (IFR), personal cross-country flight, under the provisions of 14 Code of Federal Regulations Part 91. The commercial pilot and sole passenger were not injured. Visual meteorological conditions prevailed at the destination/accident airport, and an instrument flight plan was filed and opened. The flight departed Eagle, Colorado about 1025. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on November 18, the pilot stated that during the landing roll, he applied the brakes and the left pedal went to the floor. He attempted to control the airplane with the right brake and left rudder. As the airplane slowed, the rudder became ineffective and the airplane departed the right side of the runway. The airplane struck a berm and the nose landing gear collapsed. During the accident, the engine firewall sustained substantial damage. The pilot said there were no preaccident mechanical anomalies with the airplane. The airplane was three days out of an annual inspection, and the brake master cylinders had recently been rebuilt. During a subsequent examination of the airplane's left brake, overseen by a Federal Aviation Administration (FAA) air safety inspector, it was determined that the left brake master cylinder seal had failed, rendering the left brake inoperative. According to an airplane maintenance logbook entry, the master brake cylinder had been rebuilt about 40 service hours prior to the failure. The pilot reported that, during the landing, he applied the brakes and that the left pedal subsequently hit the floor. He attempted to control the airplane with the right brake and left rudder, but, as the airplane slowed, the rudder became ineffective. The airplane departed the right side of the runway, struck a berm, and the nose landing gear collapsed. Postaccident examination of the airplane's left brake revealed that the left brake master cylinder seal had failed, which rendered the left brake inoperative. A review of the airplane maintenance records revealed that the brake master cylinders had recently been rebuilt and had accumulated about 40 service hours before the failure. 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 systems-Landing gear system-Brake-Failure - C
Verbatim from NTSB's published report. Source file
NTSB_2013_WPR14LA050.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 ↗