NTSB CAROL · Event
Event ERA25LA130
Registry · N43DN
FAA Aircraft Registry record.
Make / Model
PIPER PA-28-235
Year of manufacture
1972 · 53 years old at event
Engine
LYCOMING 0-540 SERIES (250 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19721028
ADS-B equipped
Yes — Mode-S A5211D
Registrant of record
MURPHY JOHN R
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s improper decision to continue the visual flight rules flight into instrument meteorological conditions, which resulted in the accumulation of airframe icing and a subsequent aerodynamic stall/spin.
Factual narrative
The private pilot, who did not hold an instrument rating, reported that while enroute on the cross-country flight under visual flight rules (VFR), he altered his course around building clouds. He continued to monitor the weather conditions at local airports along the planned route and was aware that they were near the VFR minimums, but he elected to continue the flight. While approaching a valley, the pilot stated that he saw a break in the clouds, so he attempted to descend to get below the cloud level. Shortly after, the pilot noticed that the weather was changing rapidly and felt that attempting to remain under the clouds would not be “legal nor safe” and he began to climb. During the climb, the airplane entered clouds, and the pilot immediately noticed water droplets forming on the airplane and freezing. The pilot applied carburetor heat and felt an associated decrease in power as he continued with the climb. While attempting to maneuver out of the clouds, the pilot-rated passenger noted that the airspeed was decreasing, and that the ice accumulating on the airframe was increasing. Shortly after, the airplane encountered an aerodynamic stall. The pilot was able to gain enough airspeed to recover, but when the pilot then attempted to climb again, and the airplane stalled for a second time. The airplane eventually entered a spin that the pilot was able to recover from. At this point, the pilot noticed trees and a “cliff” that he was attempting to direct the airplane away from, but the airspeed was decreasing. The pilot then attempted to hold the airplane away from stalling as long as possible to force a landing through trees. The airplane subsequently stalled and collided with a series of trees. The airplane’s wings separated from the fuselage during the impact sequence and the fuselage came to rest on the side of a mountain in about 4 ft of snow. The pilot and both passengers incurred minor injuries and the airplane was substantially damaged during the impact. The pilot stated that there were no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. 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).
- — Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot
- — Environmental issues-Conditions/weather/phenomena-Ceiling/visibility/precip-Below VFR minima-Decision related to condition
- — Environmental issues-Conditions/weather/phenomena-Temp/humidity/pressure-Conducive to structural icing-Awareness of condition
Verbatim from NTSB's published report. Source file
NTSB_2025_ERA25LA130.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 (icing, stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- arXiv 2023 · arXiv preprint
Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2022 · arXiv preprint
Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- NASA NTRS 2019 · Contractor Report (CR)
An Evaluation of an Analytical Simulation of an Airplane with Tailplane Icing by Comparison to Flight Data
This report presents the assessment of an analytical tool developed as part of the NASA/FAA Tailplane Icing Program. The analytical tool is a specialized simulation program called TAILSM4 which was de…
- NASA NTRS 2019 · Technical Publication (TP)
NASA/FAA Tailplane Icing Program: Flight Test Report
This report presents results from research flights that explored the characteristics of an ice-contaminated tailplane using various simulated ice shapes attached to the leading edge of the horizontal …
- NASA NTRS 2019 · Other
[Tail Plane Icing]
The Aviation Safety Program initiated by NASA in 1997 has put greater emphasis in safety related research activities. Ice-contaminated-tailplane stall (ICTS) has been identified by the NASA Lewis Icin…
- Embry-Riddle Scholarly Commons 2019 · Journal article (IJAAA)
Airport Policing in Pakistan: Structure, Training, and Issue
Airports are strategically and economically important installations of any country. Airports are the gateway of any country and any incidents at these gateways may harm the very aspects of a country i…
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