NTSB CAROL · Event
Event MIA92LA189
Aircraft involved
Probable cause & findings
UNDETECTED CHAFFING AND GROUNDING OF A WIRE TO THE NOSE LANDING GEAR SQUAT SWITCH WHICH RESULTED IN THE LANDING GEAR BEING SIGNALLED AT ALL TIMES FOR GEAR UP WHEN ELECTRICAL POWER WAS APPLIED TO THE SYSTEM. CONTRIBUTING TO THE ACCIDENT WAS THE OVERHEATING OF THE GEAR DOWN SOLENOID WHICH CAUSED IT TO STICK IN THE GEAR UP POSITION AND PREVENTED THE GEAR FROM BEING MANUALLY EXTENDED.
Factual narrative
PILOT STATED THAT WHILE ATTEMPTING TO EXTEND THE LANDING GEAR THE GEAR HYDRAULIC MOTOR OPERATED BUT THE GEAR DID NOT EXTEND. AFTER SEVERAL SECONDS OF GEAR MOTOR OPERATION THE CIRCUIT BREAKER FOR THE GEAR MOTOR POPPED. FURTHER ATTEMPTS TO EXTEND THE GEAR BY NORMAL AND EMERGENCY PROCEDURES WERE UNSUCCESSFUL. A GEAR UP LANDING WAS MADE. AFTER THE ACCIDENT THE AIRCRAFT WAS RAISED AND THE LANDING GEAR WAS EXTENDED BY USE OF THE MANUAL GEAR EXTENSION EMERGENCY HYDRAULIC PUMP. ACCORDING TO MAINTENANCE PERSONNEL A WIRE TO THE NOSE LANDING GEAR SQUAT SWITCH WAS CHAFFED AND GROUNDED WHICH CAUSED THE SYSTEM TO BE SIGNALLED FOR GEAR UP AT ALL TIMES. THEY FURTHER STATED THE PILOT COULD NOT EXTEND THE GEAR BY USE OF THE BACKUP HYDRAULIC PUMP BECAUSE THE GEAR DOWN SOLENOID HAD OVERHEATED DURING ATTEMPTS TO LOWER THE GEAR AND FROZE IN THE GEAR UP POSITION. AFTER THE SOLENOID COOLED AFTER LANDING THEY WERE ABLE TO MANUALLY LOWER THE GEAR. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1992_MIA92LA189.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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