NYC91FA212
1991-08-16 · BROOKHAVEN, New York, United States · Fatal · 1 aircraft · Status: Completed
Airport ISP
N104SB has since been reassigned. It is now registered to a different aircraft (QUAD CITY ULTRALIGHT ACFT CORP CHALLENGER II, built 2004), which was not involved in this event.
Aircraft involved
Probable cause & findings
PILOT PHYSIOLOGICAL INCAPACITATION WHICH RESULTED IN A LOSS OF CONTROL IN FLIGHT, AND AN UNCONTROLLED DESCENT INTO WATER.
Factual narrative
WHILE ON A HEADING OF APPROX 270, THE PILOT WAS INSTRUCTED TO FOLLOW ANOTHER AIRPLANE INTO THE AIRPORT. HE DID NOT TURN IN ON FINAL AND CONTINUED FOR ALMOST 3 MILES. WHEN THE ATCT TOLD HIM TO TURN TO 180 FOR RESEQUENCING, HE TURNED TO 330, TOWARD THE AIRPORT AND STARTED A DESCENT FROM 2000 FEET. THE AIRPLANE DESCENDED TO 1600 FEET, AND THEN STARTED A CLIMB BACK TO 2000 FEET, WITH A SHALLOW LEFT TURN, CONTACTED APPROACH CONTROL AND CONTINUED THE TURN TO 150. THE RADAR DATA SHOWED THE AIRCRAFT SPEED STARTED TO DECREASE WHEN THE AIRPLANE CLIMBED. THERE WAS A CONTINUED DECREASE OF SPEED TO 44 KNOTS, AT WHICH POINT, THE AIRPLANE STARTED A DESCENT, FOLLOWED BY A LEFT SPIN, AND IMPACTED WATER. THE RADAR DATA SHOWED NO RAPID COURSE CHANGES PRIOR TO THE LOW POINT OF SPEED. THE AIR/GROUND TAPES SHOWED THE PILOT SOMETIMES TOOK ALMOST A MINUTE BETWEEN FREQUENCY CHANGES, AND HIS VOICE WAS INDECISIVE AND HESITANT. THE PILOT HAD BEEN TREATED FOR SEIZURES SINCE 1974. ANTI-SEIZURE MEDICATION WAS FOUND IN HIS TOXICOLOGICAL SAMPLES. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_NYC91FA212.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 (loss of control). All research papers
- NASA NTRS 2011 · Conference Paper Joint thunderstorm operations using the NASA F-106B and FAATC/AFWAL Convair 580 airplanes
During the 1985 thunderstorm season, three joint thunderstorm research flights were conducted within 100 n.mi. of NASA Langley by the NASA Storm Hazards F-106B and the FAA/USAF CV-580 research airplan…
- NTSB Aircraft Accident Reports 2004 · Accident report In-Flight Separation of Vertical Stabilizer — American Airlines Flight 587
American Airlines 587 (A300-605R) Belle Harbor, NY, November 12, 2001 — 265 fatalities. Investigation of the post-takeoff in-flight breakup of American 587 over Belle Harbor.
- NASA NTRS 2024 · Presentation American Airlines Flight 587 Crash Investigation: NASA Langley Research Center Participation and Perspective
- NASA NTRS 2019 · Other Documentation for Three Wake Vortex Model Data Sets from Simulation of Flight 587 Wake Vortex Encounter Accident Case
This document contains a general description for data sets of a wake vortex system in a turbulent environment. The turbulence and thermal stratification of the environment are representative of the co…
- NASA NTRS 2016 · Conference Paper An overview of SAE ARP 1587: Aircraft gas turbine engine monitoring system guide
A systematic approach to developing an engine monitoring system (EMS) is outlined. An extensive shopping list of EMS capabilities and benefits are included.
- 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…