NTSB CAROL · Event
Event WPR18LA184
Aircraft involved
Probable cause & findings
The failure of the airplane’s nose wheel steering/centering mechanism, which resulted in a loss of directional control and subsequent runway excursion.
Factual narrative
On June 16, 2018, about 1300 mountain standard time, a Piper PA-31-350 airplane, N621PG, was substantially damaged when it was involved in an accident near Page, Arizona. The two commercial pilots were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. According to the pilot, during the landing roll, the airplane veered to the right and he was unable to maintain directional control. The airplane subsequently exited the runway and the nose landing gear collapsed. Examination of the airplane by a Federal Aviation Administration inspector revealed that the nose steering/centering mechanism had fractured and separated from the nose wheel assembly, resulting in a misalignment when the gear was extended. According to the airport manager, no foreign object debris was located on the runway or grassy area off the right side of the runway where the airplane came to rest after the landing. A review of accident site pictures revealed that three skid marks were visible from the runway centerline to where the airplane came to rest. The center skid mark, corresponding to the nose landing gear, was darker and about 2 to 3 times wider than the outside skid marks, which corresponded to the main landing gear. The pilot stated that, during the landing roll, he was unable to maintain directional control, and the airplane veered right and exited the runway, where the nose landing gear collapsed. Examination of the airplane revealed that the nose gear steering/centering mechanism was fractured, which resulted in the improper alignment of the nose landing gear when it was extended, and a subsequent loss of directional control. Three skid marks were visible from the runway centerline to where the airplane came to rest. The center skid mark was consistent with the nose landing gear and was darker and was about 2-3 times the width of the marks from the main tires; consistent with the nose landing gear's misalignment during the landing roll. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- — Aircraft-Aircraft systems-Landing gear system-Nose/tail gear strut/axle-Failure
Verbatim from NTSB's published report. Source file
NTSB_2018_WPR18LA184.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 excursion). 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) 2024 · SKYbrary article
Runway Excursion — SKYbrary Knowledge Base
SKYbrary runway excursion review — RE-OE (overruns) + RE-LO (lateral). Risk drivers: long landing, high approach speed, contaminated surface, tailwind, mis-set autobrakes.
- NTSB Aircraft Accident Reports 2019 · Accident report
Embraer ERJ 175 Runway Excursion at Charlotte Douglas
Republic Airline ERJ-175 runway excursion CLT, January 2018. Examines a low-energy runway excursion involving misuse of autobrakes + thrust reverser response after a high-crosswind landing on a contam…
- NASA NTRS 2025 · Presentation
Uncovering Resilient Behavior in the Aviation Safety Reporting System Using Large Language Models
Resiliency is present in everyday life, both in system design and exhibited by the operators that function within these systems.
- NASA NTRS 2025 · Conference Paper
Uncovering Resilient Behavior in the Aviation Safety Reporting System Using Large Language Models
Resiliency is present in everyday life, both in system design and exhibited by the operators that function within these systems.
- Flight Safety Foundation 2024 · FSF / AeroSafety World
Runway Safety Initiative Final Report (RSI)
Foundation Runway Safety Initiative final report — comprehensive analysis of runway excursion + incursion risk drivers worldwide.
- Semantic Scholar 2020 · Article
Towards online prediction of safety-critical landing metrics in aviation using supervised machine learning
Abstract In recent years, due to the increased availability of data and improvements in computing power, application of machine learning techniques to various aviation safety problems for identifying,…
Browse the full corpus — academia portal ↗