WPR12CA145
2012-03-23 · Conrad, Montana, United States · None · 1 aircraft · Status: Completed
Airport S01
Aircraft involved
Probable cause & findings
The pilot did not maintain directional control of the airplane due to ice and slushy snow on the runway during the landing roll.
Factual narrative
The pilot, who was executing a Global Positioning System approach to a non-controlled airport with an unmonitored Common Traffic Advisory Frequency, saw a snowplow clearing snow from the runway as he broke out of the overcast in a light snow shower. Soon after the pilot spotted the snowplow, it exited the runway, and he continued his approach/landing sequence. After touchdown, the airplane began to slide when it encountered an area of ice and slush that still remained on the runway surface. Although the pilot decided he should initiate a go-around, he was never sufficiently realigned with the runway to feel that he could safely apply go-around power. As the pilot continued his efforts to realign the airplane, it departed the side of the runway, and prior to coming to a stop it impacted a natural gas line warning sign. The impact with the sign resulted in a tear in the stressed skin of the fuselage that exceeded eight inches in length. The pilot did not report any mechanical malfunction associated with the accident sequence. The pilot, who was executing a global positioning system approach to a non-controlled airport, saw a snowplow clearing snow from the runway as he broke out of the overcast in a light snow shower. Soon after the pilot spotted the snowplow, it exited the runway, and the pilot continued his approach/landing sequence. After touchdown, the airplane encountered an area of ice and slush on the runway and began to slide. The pilot stated that he should have initiated a go-around, but the airplane was never sufficiently realigned with the runway so he could safely apply go-around power. As the pilot continued his efforts to realign the airplane with the runway, the airplane departed the side of the runway and impacted a natural gas line warning sign. The impact with the sign resulted in a tear in the stressed skin of the fuselage that exceeded eight inches in length. The pilot did not report any mechanical malfunction during the accident sequence. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
- — Environmental issues-Physical environment-Runway/land/takeoff/taxi surfa-Snow/slush/ice covered-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2012_WPR12CA145.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
Matched on aircraft type or causal vocabulary (go-around). All research papers
- NASA NTRS 2025 · Conference Paper A Training Study to Improve Monitoring During A Go-Around
As part of an FAA program to improve go-around (GA) safety, we were asked to determine if we could improve the performance of the Pilot Monitoring (PM) during a GA maneuver.
- Flight Safety Foundation 2024 · FSF / AeroSafety World Go-Around Safety Forum Findings
Foundation Go-Around Safety Forum technical findings — examines why pilots fail to execute go-arounds when criteria are met (stabilized approach gate not met, energy state out of envelope, traffic con…
- Semantic Scholar 2022 · Article (Journal of Safety Research) Go-around accidents and general aviation safety.
INTRODUCTION Changes in General Aviation (GA) accident rates, specifically in the go-around phase, are examined by comparing the number of accidents, the proportion of fatal accidents, and the proport…
- Semantic Scholar 2021 · Article (Aerospace) Classification and Analysis of Go-Arounds in Commercial Aviation Using ADS-B Data
Go-arounds are a necessary aspect of commercial aviation and are conducted after a landing attempt has been aborted. It is necessary to conduct go-arounds in the safest possible manner, as go-arounds …
- NASA NTRS 2021 · Accepted Manuscript (Version with final changes) Go-Around Criteria Refinement for Transport Category Aircraft
Presently, airline pilots are trained to go around if, when lower than 500 ft above the ground, they are outside of a handful of parameters such as airspeed, position, and rate of descent.
- NASA NTRS 2019 · Conference Paper Validation of Proposed Go-Around Criteria Under Various Environmental Conditions
This paper evaluates the effects of environmental conditions on touchdown performance under varying approach states and validates proposed go-around criteria developed using data from a previously con…