NTSB CAROL · Event
Event MIA91LA003
Registry · N7128J
FAA Aircraft Registry record.
Make / Model
AEROSTAR INTERNATIONAL INC S-57A
Year of manufacture
1995
Engine
NONE NONE
Seats / Engines
1 seats · 1 engine
Last airworthiness date
19950609
ADS-B equipped
Yes — Mode-S A986F4
Registrant of record
HELSTROM-HANLEY CHERI A
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
THE LACK OF LUBRICATION BY MAINTENANCE PERSONNEL OF THE NOSE LANDING GEAR ACTUATOR.
Factual narrative
DURING FLT BEFORE ACCIDENT FLT, THE LANDING GEAR MALFUNCTIONED. EMERGENCY GEAR EXTENSION WAS ACCOMPLISHED BUT REQUIRED EXCESSIVE FORCE. MAINTENANCE PERSONNEL LUBRICATED THE NOSE GEAR RETRACT CHAIN & ADJUSTED THE GEAR DOWN LIGHT INDICATOR SWITCH. THE AIRPLANE WAS FLOWN WITH NO DISCREPANCIES NOTED. THE ACCIDENT FLT WAS UNEVENTFUL UNTIL AFTER LOWERING THE LANDING GEAR SELECTOR HANDLE, THE GEAR DID NOT FULLY EXTEND. THE EMERGENCY METHOD WAS UNSUCCESSFUL. THE MAIN GEAR COLLAPSED DURING THE LANDING ROLL. EXAM OF THE LANDING GEAR SYSTEM REVEALED THAT THE NOSE GEAR ACTUATOR WAS SEIZED DUE TO LACK OF LUBRICATION. THE ACFT LOGBOOKS INDICATE THAT ALL GEAR ACTUATORS WERE REPLACED ON 8-23-86. THERE WERE NO FURTHER ENTRIES INDICATING THAT THEY WERE LUBRICATED. ACCORDING TO THE MAINT MANUAL, THE ACTUATORS SHOULD BE REMOVED FOR LUBRICATION EVERY 1,000 CYCLES OF OPERATION OR 30 MOS., WHICHEVER OCCURS FIRST. THE ACFT ACCUMULATED 3,154 CYCLES SINCE REPLACEMENT OF THE ACTUATORS. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1990_MIA91LA003.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 ↗