Unstable approach — UAL403

UAL403 (United Airlines) was operating from KFLL to KORD on 2026-08-22. SkyMeter detected a low approach-stability score at Chicago O'Hare International Airport (KORD) on runway 33 at 23:13 UTC. Trace data at the event: 1764 ft AGL, 166 kt GS. Approach stability score: 45/100. Scores below 50 occur on under 10% of approaches at this runway and indicate the v2 scorer flagged the approach as highly anomalous (three or more gates exceeded the runway's P90 envelope simultaneously). METAR at the time reported 15 kt wind, 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.

• SECURITY5/2809 2025-10-20 12:00Z – 2026-10-20 12:00Z SFC–2,000 ft

  Palm Beach, FL, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local

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• SECURITY6/0708 2026-08-01 00:01Z – 2027-08-01 23:59Z SFC–400 ft

  Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC

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• UAS PUBLIC GATHERING6/3173 2026-08-13 21:00Z – 2026-08-23 07:00Z SFC–400 ft

  Lebanon, TN, Thursday, August 13, 2026 through Sunday, August 23, 2026 UTC

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• VIP6/5889 2026-08-20 21:15Z – 2026-08-23 21:15Z SFC–4,999 ft

  Cincinnati, OH, Thursday, August 20, 2026 through Sunday, August 23, 2026 Local

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• AIR SHOWS/SPORTS6/5148 2026-08-21 14:00Z – 2026-08-23 22:00Z SFC–16,000 ft

  gary, IN, Friday, August 21, 2026 through Sunday, August 23, 2026 UTC

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• AIR SHOWS/SPORTS6/5120 2026-08-21 17:00Z – 2026-08-24 02:30Z SFC–16,000 ft

  Terre Haute, IN, Friday, August 21, 2026 through Monday, August 24, 2026 UTC

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• UAS PUBLIC GATHERING6/5501 2026-08-21 21:00Z – 2026-08-23 04:30Z

  CHICAGO, IL, Friday, August 21, 2026 through Sunday, August 23, 2026 UTC

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• UAS PUBLIC GATHERING6/5508 2026-08-21 21:00Z – 2026-08-23 04:30Z SFC–400 ft

  Chicago, IL, Friday, August 21, 2026 through Sunday, August 23, 2026 UTC

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• UAS PUBLIC GATHERING6/5523 2026-08-22 22:00Z – 2026-08-23 03:00Z SFC–400 ft

  cincinnati, OH, Saturday, August 22, 2026 through Sunday, August 23, 2026 UTC

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• SECURITY6/6742 2026-08-22 22:30Z – 2026-08-23 03:59Z SFC–400 ft

  Tampa, FL, Saturday, August 22, 2026 through Saturday, August 22, 2026 Local

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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.

All events on this flight

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