BFO94LA106
1994-06-18 · LEESBURG, Virginia, United States · None · 1 aircraft · Status: Completed
Airport JYO
Current FAA registration · N6679U
- Make / Model
- MOONEY M20C
- Engine
- LYCOMING O&VO-360 SER (180 hp)
- Seats / Engines
- 4 seats · 1 engine
- Last airworthiness date
- 19890505
- ADS-B equipped
- Yes — Mode-S A8D1E0
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
THE PILOT'S FAILURE TO MAINTAIN THE MINIMUM DESCENT ALTITUDE UNTIL THE PUBLISHED APPROACH FIX. FACTORS RELATED TO THE ACCIDENT WAS PILOT FATIGUE, LOW CEILINGS, OBSCURATION, AND FOG.
Factual narrative
On June 18, 1994, about 0528 eastern daylight time, a Mooney M20C, N6679U, operated by the owner/pilot, impacted trees in Leesburg, Virginia, during an instrument approach. The airplane was substantially damaged. The private pilot, the sole occupant, was not injured. Instrument meteorological conditions prevailed and a flight plan was filed. The personal flight departed from Birmingham, Alabama, and was conducted under 14 CFR 91. The pilot stated that he began the flight about 1930 on the evening prior to the accident from Houston, Texas. He flew from Houston to Birmingham, Alabama. After refueling the airplane and obtaining a weather briefing, the pilot departed Birmingham at 0040 on the morning of the accident. As he approached the Leesburg Airport, the pilot obtained weather information from the Dulles International Airport Automated Terminal Information Service (ATIS), Washington, D.C. The pilot recalled that ATIS was reporting a ceiling of 1,100 feet above the ground (agl) and a partially obscured sky. The actual recorded ATIS six minutes after the accident reported a cloud ceiling of 700 feet agl, a partially obscured sky, and a visibility of 1/2 mile in fog. The pilot was vectored for the localizer approach to runway 17 at the Leesburg Airport by air traffic control (ATC). The distance measuring equipment (DME) was out of service at the time of the approach, and the pilot stated that he was aware of the outage from his original weather briefing in Houston prior to the flight. The published minimum descent altitude (MDA) and visibility for the approach (approach plate attached) without the use of DME is 1,020 feet mean sea level (636 feet agl) and one mile. The pilot began the approach and impacted trees. In a telephone interview one day after the accident, the pilot stated that after passing the middle marker, he "... went down too fast..." through the MDA after "... missing a step down fix." He then saw the tops of trees below him, and the right wing and right landing gear contacted the trees. In a written statement to the NTSB, the pilot further stated that he "...either reached the [1,000-foot] MDA prior to the 2.7 mile DME fix which put me in the trees or I descended below the MDA." Following the impact with the trees, the pilot "pulled up" and was able to perform a missed approach. He elected to keep the landing gear extended and declared an emergency with ATC at the Dulles International Airport. He then performed the instrument landing system (ILS) approach to runway 1R at Dulles and landed uneventfully. He did not report any malfunctions with the airplane during the flight. According to an FAA aviation safety inspector from Washington, D.C., the right wing, right landing gear, and left elevator sustained substantial damage. The pilot told the FAA inspector that he had been awake for about 24 hours prior to the accident, except for a 2 1/2 hour "nap" in his automobile. In a written statement to the NTSB, the pilot stated: "My judgement may have been adversely impacted by the fact that I didn't get a full days rest prior to the overnight flight." THE AIRPLANE IMPACTED TREES AFTER PASSING THE MIDDLE MARKER WHILE THE PILOT ATTEMPTED A NON-PRECISION INSTRUMENT LANDING AT NIGHT. THE REPORTED CEILING WAS 700 FEET AND THE VISIBILITY WAS REPORTED AS 1/2 MILE IN FOG. THE PILOT STATED THAT HE DESCENDED BELOW THE MINIMUM DESCENT ALTITUDE PREMATURELY. THE PILOT ALSO STATED THAT HIS JUDGEMENT WAS IMPAIRED DUE TO FATIGUE. NO MECHANICAL MALFUNCTIONS WERE REPORTED. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1994_BFO94LA106.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 (pilot fatigue). All research papers
- Semantic Scholar 2025 · Article (Italian National Conference on Sensors) ASFT-Transformer: A Fast and Accurate Framework for EEG-Based Pilot Fatigue Recognition
Objective evaluation of pilot fatigue is crucial for enhancing aviation safety. Although electroencephalography (EEG) is regarded as an effective tool for recognizing pilot fatigue, the direct applica…
- SKYbrary (Eurocontrol) 2023 · SKYbrary article Pilot Fatigue — SKYbrary Knowledge Base
SKYbrary pilot fatigue review — circadian biology, biomathematical models (SAFE/FAID), commuting impacts, regulatory frameworks (FAR 117 + EU 83/2014).
- NASA NTRS 2023 · Presentation Nasa Pilot Fatigue Research: Past, Present & Future
Pilot fatigue research at NASA Ames has a long history, initiated by a Congressional request to investigate the magnitude of fatigue, sleep loss and circadian disruption in flight operations, and how …
- Semantic Scholar 2023 · Article (Frontiers in Public Health) Pilot fatigue survey: A study of the mutual influence among fatigue factors in the “work” dimension
Background Fatigue risk management for pilots has received increasing attention. The existing fatigue management systems have detailed descriptions of the factors and the mutual influences among the f…
- FAA CAMI 2022 · CAMI technical report Pilot Fatigue and Sleep Patterns in Long-Range and Ultra-Long-Range Operations
Field study of crew sleep and alertness during ultra-long-range commercial operations. Combines actigraphy, sleep diaries, and PVT-B reaction tests.
- NASA NTRS 2019 · Technical Memorandum (TM) San Francisco Bar Pilot Fatigue Study
The purpose of this study was to evaluate the extent of fatigue among San Francisco Bar Pilots (Maritime Pilots) and its potential impact on safety, and to make recommendations concerning how the risk…