NYC90FA231
1990-09-28 · NANTUCKET, Massachusetts, United States · Fatal · 1 aircraft · Status: Completed
Airport ACK
Aircraft involved
Probable cause & findings
THE PILOT'S IMPROPER IFR OPERATION IN ATTEMPTING AN ILS APPROACH IN AN AIRPLANE NOT EQUIPPED WITH AN ILS GLIDE SLOPE RECEIVER. THE WEATHER CONDITIONS WERE FACTORS IN THE ACCIDENT.
Factual narrative
THE PILOT HAD BEEN CLEARED FOR THE ILS APPROACH TO RUNWAY 24. HE TERMINATED THE FIRST APPROACH DUE TO AN 'AUTOPILOT PROBLEM.' HE WAS THEN VECTORED FOR THE SECOND APPROACH, AND SHORTLY AFTER REPORTING THE LOCATOR OUTER MARKER INBOUND RADIO COMMUNICATION WAS LOST. THE PUBLISHED CROSSING ALTITUDE AT THE MARKER IS 1,600 FEET. NTAP DATA REVEALED THE AIRPLANE CROSSED THE MARKER AT 800 FEET. THE AIRPLANE WAS NOT EQUIPPED WITH A GLIDE SLOPE RECEIVER/INDICATOR. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1990_NYC90FA231.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 (autopilot). All research papers
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- arXiv 2022 · arXiv preprint Experimental Flight Testing of a Fault-Tolerant Adaptive Autopilot for Fixed-Wing Aircraft
This paper presents an adaptive autopilot for fixed-wing aircraft and compares its performance with a fixed-gain autopilot.
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This paper develops an adaptive digital autopilot for a fixed-wing aircraft and compares its performance with a fixed-gain autopilot.
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