NTSB CAROL · Event
Event OPS07IA006
Aircraft involved
Probable cause & findings
The probable cause of this incident was the United 1544 flight crew's inadvertent entry onto the active runway.
Factual narrative
On July 11, 2007, at 1437 Eastern daylight time a runway incursion occurred at the Fort Lauderdale-Hollywood Airport, (FLL), Fort Lauderdale, Florida between United (UAL) flight 1544, an A-320 and Delta Airlines (DAL) flight 1489, a Boeing 757. The incident occurred in day visual flight rules conditions, visibility 10 miles, scattered clouds at 4,800 feet. The FLL ground controller (GC) instructed UAL1544 to taxi to runway 9L via taxiways T7, D, and B. As the flight was taxiing on taxiway D near runway 9L, the tower local controller (LC) noticed the airplane was going too fast to hold short of the runway. LC told the GC to tell UAL to stop. The GC said "UAL 1544 stop, stop, stop". The crew stopped short of runway 9L. DAL1489 was inbound for landing on runway 9L when LC determined that UAL1544 was not going to hold short of the runway. LC instructed DAL1489 to go around. When the crew received the instruction, the main landing gear was on the ground. According to the crew statement, they noted the urgency in the controller's voice so they knew they had to get the aircraft airborne. According to the FAA, the UAL crew stated they missed the turn onto taxiway B. According to recorded flight data, the aircraft missed colliding by 230 feet laterally. FLL air traffic control tower is not equipped with either AMASS or ASDE-X. All airport lighting was functioning normally. On July 11, 2007, at 1437 Eastern daylight time a runway incursion occurred at the Fort Lauderdale-Hollywood Airport, (FLL), Fort Lauderdale, Florida between United (UAL) flight 1544, an A-320 and Delta Airlines (DAL) flight 1489, a Boeing 757. The incident occurred in day visual flight rules conditions, visibility 10 miles, scattered clouds at 4,800 feet. The FLL ground controller (GC) instructed UAL1544 to taxi to runway 9L via taxiways T7, D, and B. As the flight was taxiing on taxiway D near runway 9L, the tower local controller (LC) noticed the airplane was going too fast to hold short of the runway. LC told the GC to tell UAL to stop. The GC said "UAL 1544 stop, stop, stop". The crew stopped on runway 9L, 30 feet from the centerline. DAL1489 was inbound for landing on runway 9L when LC determined that UAL1544 was not going to hold short of the runway. LC instructed DAL1489 to go around. When the crew received the instruction, the main landing gear was on the ground. According to the crew statement, they noted the urgency in the controller's voice so they knew they had to get the aircraft airborne. FAA reported DAL1489 flew over UAL1544 by less than 100 feet. According to the FAA, the UAL crew stated they missed the turn onto taxiway B. FLL air traffic control tower is not equipped with either AMASS or ASDE-X. All airport lighting was functioning normally. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2007_OPS07IA006.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 (runway incursion). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- SKYbrary (Eurocontrol) 2023 · SKYbrary article
Runway Incursion — SKYbrary Knowledge Base
SKYbrary runway incursion review — taxonomy (operational error, vehicle/pedestrian, pilot deviation), severity categories A-D, mitigation technologies (ASDE-X, ASSC, RAAS, RIAAS).
- Semantic Scholar 2023 · Article (Future Transportation)
Investigating Runway Incursion Incidents at United States Airports
According to the Federal Aviation Administration (FAA), the number of runway incursions is increasing. Over the last two decades, the number of runway incursions at U.S.
- FAA-affiliated R&D (MITRE / Volpe / FAA Tech Center) 2022 · MITRE risk analysis
Runway Incursion Prevention Systems — Surface Domain Risk Analysis
MITRE risk analysis of runway-incursion prevention systems (RIPS) — ASDE-X / ASSC + Airport Surface Detection Equipment performance characterization. Findings drove FAA Surface Safety Action Plan.
- Semantic Scholar 2020 · Article (Journal of Physics: Conference Series)
Comparison of Detection Technology for Runway Incursion Prevention in Airport Hot Spot
The prevention of runway incursion in hot spot of airports has always been one of the research hot spots in the field of international civil aviation.
- Embry-Riddle Scholarly Commons 2020 · Journal article (IJAAA)
Analysis of Runway Incursion Trends: Implications for Cost-Benefit Analysis of Mitigation Investments
This causal-comparative and correlation study investigated the costs of runway incursion safety improvements in relation to their effectiveness to assess potential aviation system benefits.Two airport…
- Semantic Scholar 2020 · Article
Analysis of Runway Incursion Trends: Implications for Cost-Benefit Analysis of Mitigation Investments
Browse the full corpus — academia portal ↗