NTSB CAROL · Event
Event WPR25LA178
Registry · N9404N
FAA Aircraft Registry record.
Make / Model
PIPER PA-28R-200
Year of manufacture
1969 · 56 years old at event
Engine
LYCOMING I0360 SER (180 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19690708
ADS-B equipped
Yes — Mode-S AD1019
Registrant of record
REGISTRATION PENDING
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
A failure of the brake system during landing due to a hydraulic fluid leak, which resulted in a runway excursion.
Factual narrative
The pilot reported that during a test flight following an annual inspection, he landed normally, but the brakes faded almost immediately after he applied them. The pilot exited the runway, and the airplane collided with a fence, which resulted in substantial damage to the right wing. Postaccident examination of the brake system revealed a small leak at the brake line fitting at the left caliper and the brake fluid reservoir was 2/3 empty. 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-Brake-Failure
- — Aircraft-Fluids/misc hardware-Fluids-Hydraulic fluid-Fluid level
Verbatim from NTSB's published report. Source file
NTSB_2025_WPR25LA178.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 ↗