NTSB CAROL · Event
Event SEA04LA157
Aircraft involved
Probable cause & findings
Fuel starvation as a result of the pilot's improper fuel management. Carburetor icing conditions and trees were a factor.
Factual narrative
On August 7, 2004, about 1500 Pacific daylight time, an experimental Headrick Vans RV9A, N3086J, registered to and operated by the pilot as a 14 CFR Part 91 personal flight, experienced a loss of engine power while on downwind for landing at the Westport Airport, Westport, Washington. During the forced landing, the aircraft collided with trees and the terrain short of runway 30. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft was substantially damaged. The private pilot was seriously injured and the passenger received minor injuries. The aircraft departed from Eugene, Oregon, about one hour and thirty minutes prior to the accident. During a telephone interview, the pilot reported that he departed from Eugene with about 28 gallons of fuel. About 30 miles out from landing, the pilot noted that the fuel gage for the right tank (tank selected) was indicating about 2.5 gallons of fuel. When the flight reached the airport, the pilot flew a low downwind to check out the sand bar north of the airport as he and his passenger were planning on fishing in that area. The pilot then turned back to the airport and set-up for a landing on runway 30. The pilot reported that while on downwind, the engine started running rough, the rpm decreased, and the engine subsequently quit. The pilot initiated a forced landing just short of the runway. During the descent, the aircraft collided with trees and the ground. The pilot further stated that while in the pattern for landing, he heard other pilots reporting carburetor icing conditions. The nearest weather reporting facility was located at Hoquiam, Washington, located eight nautical miles northeast of the accident site, reported the weather at 1453 as a temperature of 66 degrees F and a dewpoint of 57 degrees. The attached carburetor icing chart indicates moderate icing - cruise power or serious icing - glide power for those conditions. The pilot reported that he had not been using carburetor heat prior to the loss of power. A Federal Aviation Administration Inspector from the Seattle, Washington, Flight Standards District Office responded to the accident site. The inspector reported that the right fuel tank was empty of fuel, while the left fuel tank still contained some fuel. The pilot reported that he had been operating off of the right fuel tank at the time of the loss of power. During the wreckage recovery by personnel from AvTech Services, Kent, Washington, on August 10, 2004, approximately 15 gallons of blue colored fuel was drained from the left fuel tank. The right fuel tank had been compromised and no fuel was present. AvTech personnel reported that no fuel staining discoloration from leakage onto the grass under the right wing was noted. Investigators from the National Transportation Safety Board and the Federal Aviation Administration, inspected the engine on August 13, 2004. During the inspection it was noted that the primer lines, fuel outlet line from the fuel pump and the carburetor bowl were void of fuel. The pilot reported that he departed from his departure point with about 28 gallons of fuel. About 30 miles out from landing at his destination, the pilot noted that the fuel gage for the right tank (tank selected) was indicating about 2.5 gallons of fuel. When the flight reached the airport, the pilot flew a low downwind to check out the sand bar north of the airport as he and his passenger were planning on fishing in that area. The pilot then turned back to the airport and set-up for a landing on runway 30. The pilot reported that while on downwind, the engine started running rough, the rpm decreased, and the engine subsequently quit. The pilot initiated a forced landing just short of the runway. During the descent, the aircraft collided with trees and the ground. The pilot further stated that carburetor icing conditions were present in the area, however, he had not been utilizing carburetor heat prior to the loss of power. Inspection of the wreckage found that the right fuel tank was empty of fuel, while the left fuel tank still contained 15 gallons. The pilot reported that he had been operating off of the right fuel tank at the time of the loss of power. Inspection of the engine noted that the primer lines, fuel outlet line from the fuel pump and the carburetor bowl were void of fuel. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2004_SEA04LA157.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, fuel starvation). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2026 · Contractor Report (CR)
Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint
Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
This study investigates the competitive dynamics of airport pricing using U.S. airport data to validate the findings. It employs linear and nonlinear ordinary differential equation models to analyze t…
- NASA NTRS 2025 · Presentation
NASA Icing Update – March 2025
This NASA Icing Update was prepared for presentation to the SAE International AC-9C Inflight Icing Technology Committee. This update includes the following topics: planned Rotational Icing Scaling tes…
- arXiv 2024 · arXiv preprint
An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated ana…
- NASA NTRS 2024 · Presentation
NASA Icing Update – Oct 2024
This presentation provides a status update on select NASA icing research activities for the SAE AC-9C Icing Technical Committee Meeting on Oct 21, 2024.
Browse the full corpus — academia portal ↗