NYC92LA020
1991-10-27 · GROTON, Connecticut, United States · Serious · 1 aircraft · Status: Completed
Airport GON
Aircraft involved
Probable cause & findings
THE PILOT'S FAILURE TO MAINTAIN THE MINIMUM DESCENT ALTITUDE DURING THE APPROACH. A FACTOR WAS PILOT FATIGUE.
Factual narrative
THE INSTRUMENT RATED PRIVATE PILOT HAD FLOWN IN IMC CONDITIONS ON TWO IFR FLIGHT PLANS THROUGHOUT THE DAY FROM MIAMI, FLORIDA TO GROTON, CONNECTICUT. HE HAD UPDATED HIS DESTINATION AND ALTERNATE WEATHER WHILE EN ROUTE AND KNEW OF THE CONTINUING CONDITIONS. AFTER REPORTING BABET INTERSECTION AND RECEIVING CLEARANCE FOR THE APPROACH TO LAND FOR RUNWAY 23, THE PILOT DESCENDED THE AIRPLANE TO APPROXIMATELY 680 FEET MSL AND ENGAGED THE AUTOPILOT. THE AIRPLANE DESCENDED SLOWLY BELOW THE MINIMUM DESCENT ALTITUDE AND IMPACTED A WOODED AREA APPROXIMATELY 1.5 MILES FROM THE AIRPORT. THE PILOT WAS VISUALLY SCANNING OUT THE AIRPLANE'S WINDOW AND DID NOT NOTE THE DESCENT BEFORE IMPACT. HE REPORTED NO FAILURES TO ANY AIRPLANE SYSTEM OR RADIOS. THE FAA COORDINATOR FOUND NOTHING UNUSUAL WITH THE AIRPLANE AND DID STATE THAT THE PILOT REPORTED BEING TIRED AT THE TIME OF THE APPROACH. THE MINIMUM DESCENT ALTITUDE WAS 660 FEET. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_NYC92LA020.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 (pilot fatigue, imc, autopilot). 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…
- arXiv 2025 · arXiv preprint ROSflight 2.0: Lean ROS 2-Based Autopilot for Unmanned Aerial Vehicles
ROSflight is a lean, open-source autopilot ecosystem for unmanned aerial vehicles (UAVs). Designed by researchers for researchers, it is built to lower the barrier to entry to UAV research and acceler…
- arXiv 2025 · arXiv preprint ROSplane 2.0: A Fixed-Wing Autopilot for Research
Unmanned aerial vehicle (UAV) research requires the integration of cutting-edge technology into existing autopilot frameworks.
- arXiv 2024 · arXiv preprint A Data-Driven Autopilot for Fixed-Wing Aircraft Based on Model Predictive Control
Autopilots for fixed-wing aircraft are typically designed based on linearized aerodynamic models consisting of stability and control derivatives obtained from wind-tunnel testing.
- 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 …