NTSB CAROL · Event
Event NYC01IA126
Registry · N4078L
FAA Aircraft Registry record.
Make / Model
ZIPLINE INTERNATIONAL INC P2 ZIP
ADS-B equipped
Yes — Mode-S A4CA1D
Registrant of record
ZIPLINE INTERNATIONAL INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The company maintenance personnel's failure to comply with the service bulletin, which resulted in a fuel boost pump leakage and subsequent fire during taxi. A factor was the manufacturer's confusing service bulletin.
Factual narrative
On April 20, 2001, about 1300 eastern daylight time, a Piper PA-31-350, N4078L, sustained minor damage while taxing at Newark-Heath Airport (VTA), Newark, Ohio. The certificated commercial pilot and passenger were not injured. Instrument meteorological conditions prevailed for the flight that originated from Fort Wayne, Indiana. An instrument flight rules flight plan was filed for the air taxi flight conducted under 14 CFR Part 135. The pilot reported that after landing, while taxing to the ramp area, a fire was observed in the left engine. The pilot secured the engine, and then he and the passenger evacuated the airplane. Witnesses extinguished the fire with a handheld fire extinguisher. Examination of the engine by a Federal Aviation Administration (FAA) inspector revealed a leak in the left engine fuel boost pump. The pump (Lear Romec model RG9080J7A) was sent to the manufacturer for further examination. Testing at the Lear Romec facility revealed that four screws, which secured the pump valve assembly, were not properly torqued. Discussion between representatives at Lear Romec and the airplane operator revealed that there was some confusion among the operator's maintenance personnel about Lear Romec Service Bulletin 101SB020 Rev. 2. According to the service bulletin, the torque of the four screws that secured the pump valve assembly should be verified, and retorqued if necessary, at certain time intervals. However, there was another set of four screws that secured the pump housing cover, in addition to the four screws that secured the valve assembly. The testing at the Lear Romec facility indicated that the wrong set of screws had been torqued. After testing the fuel boost pump and the discussion with the operator, Lear Romec issued Service Bulletin 101SB020 Rev. 3, which clarified the correct screws to torque. After landing, while taxing back to the ramp area, the pilot observed a fire in the left engine. He secured the engine and evacuated the airplane. Examination of the engine revealed that the fuel boost pump was leaking. At the time, the pump manufacturer had a service bulletin to inspect, and retorque if necessary, four screws that secured the pump valve assembly. Examination and testing of the pump at the manufacturer's facility revealed that the wrong set of four screws had been torqued. Discussions between the pump manufacturer and airplane operator revealed that there was some ambiguity in the current service bulletin, and the maintenance personnel were confused at to which four screws the bulletin referred to. Subsequently, the pump manufacturer revised the service bulletin. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2001_NYC01IA126.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 ↗