Unstable approach — ENY4171

KBOS · 32

2026-07-17 16:54 UTC· KROC → KBOS· AMERICAN AIRLINES INC· E75L

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ENY4171 (American Airlines) was operating from KROC to KBOS on 2026-07-17. SkyMeter detected a low approach-stability score at General Edward Lawrence Logan International Airport (KBOS) on runway 32 at 16:54 UTC. Trace data at the event: 1111 ft AGL, 143 kt GS. Approach stability score: 55/100. Scores in this band occur on roughly 10-15% of approaches at this runway, with multiple gates outside the per-runway envelope. METAR at the time reported 12 kt wind, 1 kt crosswind component, 16,093 m visibility. The approach-stability score rates the final approach against stabilized-approach gates (glideslope, lateral deviation, descent rate, and IAS) at defined altitudes. A low score means one or more of those were outside the normal envelope for how the approach was flown. The score is graded by guidance type, so instrument approaches (ILS or an aligned straight-in) are held to the full gate set, while visual and pattern arrivals are surfaced only when the score is clearly low. The score is advisory and observational, a deviation measure, not an assertion of an accident. Detection algorithm and known limitations: see SkyMeter methodology.

Active FAA TFR during this flight

Source: FAA TFR archive (hourly snapshot)
  • SECURITY6/3959 2026-06-01 04:00Z – 2026-07-21 03:59Z SFC–400 ft

    Boston, MA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/3969 2026-06-01 04:00Z – 2026-07-21 03:59Z SFC–400 ft

    Waltham, MA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →

SkyMeter cross-referenced this flight against FAA-published TFRs that were active during its window and within its geographic bounding box. Overlap doesn't necessarily mean violation — the aircraft may have been outside the TFR’s precise polygon or flying under air-traffic-control coordination.

Pilot review data

  • Runway 32
  • 1111 ft AGL at event
  • 143 kt ground speed
  • 0 fpm vertical
  • Approach stability 55/100
  • 12 kt wind
  • 1 kt crosswind component
  • 16,093 m visibility
  • KBOS 161754Z COR 25008KT 10SM FEW060 FEW180 BKN250 26/14 A3028 RMK AO2 SLP253 T02560139 10256 20172 56017

Flight context

  • ENY4171
  • American Airlines
  • E75L
  • KROC → KBOS
  • 2026-07-17 16:54 UTC
  • KBOS runway 32

Automated analysis. Events shown on this page (such as go-around, unstable approach, or runway events) are heuristic classifications produced by algorithms from publicly broadcast ADS-B data. They are intended to surface flights of interest for further review — they are not findings of fact, and they do not determine pilot fault, regulatory compliance, or the cause of any occurrence. Coverage gaps and sensor noise can affect accuracy. Only the relevant civil aviation authority or accident investigation body can make official determinations. How we detect events · Dispute or correct this data

SkyMeter · trace data observed via ADS-B· KBOS