NTSB CAROL · Event
Event CHI91IA297
Aircraft involved
Probable cause & findings
INADEQUATE MAINTENANCE INSPECTION OF THE MAIN LANDING GEAR ACTUATOR ASSEMBLY BY COMPANY MAINTENANCE PERSONNEL. A FACTOR IN THE INCIDENT IS INADEQUATE DESIGN OF THE LANDING GEAR ACTUATOR BY THE MANUFACTURER.
Factual narrative
THE INCIDENT AIRPLANE LANDED WITH THE LEFT MAIN LANDING GEAR PARTIALLY EXTENDED. THE LANDING GEAR HAD FAILED TO RETRACT PROPERLY AFTER TAKEOFF. THE AIRPLANE REMAINED IN THE AREA OF THE DEPARTURE AIRPORT WHILE THE CREW, IN CONCERT WITH COMPANY MAINTENANCE PERSONNEL AND THE AIRPLANE MANUFACTURER, UNSUCCESSFULLY ATTEMPTED TO TROUBLESHOOT AND RESTORE THE LANDING GEAR TO WORKING ORDER. THEY LANDED BACK AT THE DEPARTURE AIRPORT WITH CRASH FIRE RESCUE EQUIPMENT STANDING BY. FIRE TRUCKS APPLIED FOAM TO THE LEFT WING AND WHEEL AREA AFTER THE AIRPLANE STOPPED ON THE RUNWAY. AFTER LANDING THE CREW AND PASSENGERS EXITED THE AIRPLANE USING THE AIRCRAFT AIRSTAIRS. INSPECTION OF THE LEFT MAIN LANDING GEAR (MLG) REVEALED THE LANDING GEAR TRUCKS HAD BEEN CAPTURED AND SUSPENDED IN AN INTERMEDIATE POSITION BY THE LEFT MAIN GEAR INBOARD DOOR ASSEMBLY. EXAMINATION OF THE MLG DOOR ACTUATOR FITTING SHOWED THE ACTUATOR HAD MOVED TO THE FAR END OF THE AVAILABLE ADJUSTMENT RANGE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_CHI91IA297.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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