SEA98LA031
1998-01-30 · HAVRE, Montana, United States · Fatal · 1 aircraft · Status: Completed
Airport HVR
Current FAA registration · N8798G
- Make / Model
- CESSNA 150F
- Seats / Engines
- 2 seats · 1 engine
- ADS-B equipped
- Yes — Mode-S AC1B3C
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The student pilot's loss of control after his failure to maintain airspeed. Factors include his lack of total flight experience and incapacitation due to alcohol.
Factual narrative
On January 30, 1998, about 0130 mountain standard time, N8798G, a Cessna 150F, collided with terrain at the departure end of runway 07 at Havre, Montana. The student pilot, who had received about three hours of dual flight instruction but had not yet soloed, was fatally injured, and the airplane was substantially damaged. Visual meteorological conditions prevailed. There was no fire, and no report of the ELT actuating. The airplane was removed from its hangar and flown without authorization from its owner. The student pilot's whereabouts were known until about 2347 on the previous night (which was the time he terminated a telephone conversation with a friend in Chinook, Montana), and the airplane was first noted to be missing about 0530 in the morning. There were no known witnesses to the crash. However, one individual remembered seeing an airplane at 0130, which caught his attention, as it was departing to the east with winds from the west. He said the engine was not very loud, and the airplane was about 3-400 feet off the ground. He remembered seeing red and green lights and the airplane "bobbing" in the wind, with the wings tipping from side to side. He left for work without paying further attention to the airplane, while it was still west of his house. The house is located about 1-2 blocks southwest of the crash site. FAA inspectors conducted an on-scene investigation and reported that no pre-crash mechanical anomalies were found. Toxicological testing by the FAA confirmed a concentration of 52.000 mg/dl ethanol in blood, 116.000 mg/dl in brain fluid, and 152.000 mg/dl in urine. An autopsy was performed by Roland N. Lass, for the Hill County Coroner's office on January 30, 1998, which cited the probable cause of death as massive traumatic injuries secondary to a plane crash. The student pilot had received three hours of dual instruction, but had not yet soloed. The airplane was removed from its hangar and flown without authorization from its owner. The student pilot's whereabouts were known until about 2347 the previous evening, and the airplane was first noted to be missing about 0530 in the morning. There were no known witnesses to the crash. However, one individual remembered seeing an airplane at 0130, which caught his attention, as it was departing to the east with winds from the west. He said the engine was not very loud, and the airplane was about 3-400 feet off the ground. He remembered seeing red and green lights and the airplane 'bobbing' in the wind, with the wings tipping from side to side. He left for work without paying further attention to the airplane, while it was still west of his house. The house is located about 1-2 blocks southwest of the crash site. FAA inspectors conducted an on-scene investigation and reported that no pre-crash mechanical anomalies were found. Toxicological testing by the FAA of samples from the student pilot confirmed a concentration of 52 mg/dl ethanol in blood, 116 mg/dl in brain fluid, and 152 mg/dl in urine. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1998_SEA98LA031.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
- Aviation Safety Network Aviation press ↗
- Kathryn's Report Aviation press ↗
- Aviation Herald Aviation press ↗
- AVweb Aviation press ↗
- Pilots of America Community ↗
- Reddit /r/flying Community ↗
- FlightAware Aviation press ↗
- AOPA accident database Aviation press ↗
- Google News News ↗
- DuckDuckGo News ↗
Related research
Matched on aircraft type or causal vocabulary (loss of control). All research papers
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER) A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- Semantic Scholar 2024 · Article (International Conference on Networking and Services) Risk Assessment of Loss of Control In-Flight Trajectories for Urban Air Mobility Safety
In Urban Air Mobility (UAM), maintaining a minimum separation between aircraft is a safety requirement, which becomes challenging amidst congested air traffic and off-nominal conditions, such as Loss …
- NTSB Aircraft Accident Reports 2022 · Accident report Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation) ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.