NTSB CAROL · Event
Event DCA90MA002
Aircraft involved
Probable cause & findings
A FIRE WHICH STARTED IN THE PASSENGER OXYGEN SYSTEM FOR UNDETERMINED REASONS. CONTRIBUTING TO THE ACCIDENT WAS THE FAILURE OF DELTA AIRLINES TO RECOGNIZE, ATTEND TO AND CORRECT REPEATED LEAKS IN THE OXYGEN SYSTEM.
Factual narrative
THE CREW HEARD A MUFFLED EXPLOSION & SAW FLAMES COMING FROM THE VENT NEAR SEAT 3-D WHILE ACFT WAS PARKKED AT GATE. LOCATION OF FIRE PREVENTED CREW FROM RETURNING TO COCKPIT TO NOTIFY CFR & ILLUMINATE EMERG FLOOR LIGHTING. PASSENGERS & CREW EVACUATED ACFT. SECOND OFFICER, LAST TO LEAVE, COULD NOT REACH REAR AIRSTAIRS & EXITED VIA EMERG WINDOW EXIT AFTER HAVING DIFFICULTY IN LOCATING AN EXIT BECAUSE OF SMOKE. A MECHANIC NOTED LOW PASSENGER OXYGEN SUPPLY DURING PREFLIGHT & REPLACED OXYGEN CYLINDERS. WHILE EXITING THE ELECTRICAL EQUIP BAY THE MECHANIC SAW A WHITE FLASH ENGULF THE OXYGEN SYSTEM FLOW CONTROL UNIT. HE ATTEMPTED TO HAVE CFR NOTIFIED OF THE FIRE USING A HAND HELD RADIO TO NO AVAIL. THE PASSENGER OXYGEN SYSTEM HAD 6 LOW OXYGEN QUANTITY MAINTENANCE WRITE-UPS DURING PREVIOUS 30 DAYS BUT WAS NOT 'FLAGGED' BY COMPANY AUTOMATED TREND ANALYSIS PROGRAM BECAUSE OF THE JOB TITLE OF THE PERSON ENTERING THE WRITE-UPS. INSPECTION OF DELTA'S FLEET REVEALED 35 OXYGEN SYSTEM LEAKS ON OTHER ACFT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1989_DCA90MA002.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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