NTSB CAROL · Event
Event LAX94LA129
Aircraft involved
Probable cause & findings
THE LOOSE MAIN FUEL LINE 'B' NUT DUE TO THE IMPROPER INSTALLATION OF THE RIGHT ENGINE BY COMPANY MAINTENANCE PERSONNEL.
Factual narrative
On February 21, 1994, at 0737 hours mountain standard time, a Piper PA-31-350, N4109D, right engine compartment caught fire during the landing roll-out on runway 08R at Phoenix Sky Harbor Airport, Phoenix, Arizona. The pilots were completing a visual flight rules scheduled commuter flight under Title 14 CFR Part 135. The airplane, operated by Arizona Pacific Airlines, Prescott, Arizona, sustained minor damage. The two flight crewmembers and one passenger were not injured. Another passenger fractured his ankle during the evacuation process. Visual meteorological conditions prevailed. The flight originated at Ernest J. Love Field, Prescott, Arizona, at 0712 hours. Both pilots reported in the Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1/2, that the local controller informed them of the fire shortly after touchdown. When the pilot-in-command (PIC) applied the brakes, he noticed that the right brake was ineffective. The PIC executed a left 180-degree turn to stop the airplane. After the airplane stopped, the second-in-command (SIC) assisted the passengers evacuate the airplane through the main cabin door. The PIC evacuated the airplane through the left front door. Messrs. Paul Texter and Dean Hennies, Aviation Safety Inspectors, Federal Aviation Administration (FAA), Scottsdale [Arizona] Flight Standards District Office, conducted the on-scene investigation. Inspector Texter reported that the origin of the fire was in the firewall area next to the main fuel line. He also said that Inspector Hennies found the right main fuel line "B" nut loose, and that both engines were replaced on February 18, 1994. DURING THE LANDING ROLL-OUT, THE RIGHT ENGINE MAIN FUEL LINE 'B' NUT BECAME LOOSE CAUSING A FIRE IN THE ENGINE'S ACCESSORY COMPARTMENT. ONE PASSENGER SUSTAINED A FRACTURED ANKLE DURING THE EVACUATION PROCESS. COMPANY MAINTENANCE PERSONNEL REPLACED BOTH ENGINES THREE DAYS BEFORE THE ACCIDENT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1994_LAX94LA129.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 (stall, 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 2023 · Conference paper
The Value of Strong Partnerships to Build a Successful Aviation Maintenance Career Pathway Program for Transitioning Military Service Members
The aerospace industry is competing with other industries for a qualified workforce, and many of those competing industries are investing heavily in creating workforce development pipelines.
- 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…
- NASA NTRS 2026 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- 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.
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