Unstable approach — UAL1566

UAL1566 (UMB Bank NA) was operating from KIAD to MMJC on 2026-08-17. SkyMeter detected a low approach-stability score at Atizapan de Zaragoza Airport (MMJC) on runway 04 at 04:59 UTC. Trace data at the event: 9107 ft AGL, 163 kt GS. Approach stability score: 39/100. 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 4 kt wind, 3 kt crosswind component. 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.

• SECURITY5/6914 2025-05-06 23:30Z – 2027-10-18 11:03Z SFC–6,000 ft

  South Padre Island, TX, Tuesday, May 6, 2025 Local

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• 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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• SECURITY5/3678 2026-01-01 05:00Z – 2027-01-01 05:59Z SFC–2,000 ft

  Brownsville, TX, Thursday, January 1, 2026 through Friday, January 1, 2027 Local

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• SECURITY5/3679 2026-01-01 05:00Z – 2027-01-01 05:59Z SFC–5,000 ft

  Brownsville, TX, Thursday, January 1, 2026 through Friday, January 1, 2027 Local

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• SECURITY6/0299 2026-06-26 04:00Z – 2026-10-18 03:59Z SFC–5,000 ft

  Key West, FL, Friday, June 26, 2026 through Saturday, October 17, 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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• HAZARDS6/2568 2026-08-06 14:22Z – 2026-08-20 05:00Z SFC–5,000 ft

  BROWNSVILLE, TX, Thursday, August 6, 2026 through Thursday, August 20, 2026 UTC

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• HAZARDS6/2575 2026-08-06 15:06Z – 2026-08-20 05:00Z SFC–5,000 ft

  BROWNSVILLE, TX, Thursday, August 6, 2026 through Thursday, August 20, 2026 UTC

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• HAZARDS6/3249 2026-08-10 15:17Z – 2026-08-20 05:00Z SFC–5,000 ft

  BROWNSVILLE, TX, Monday, August 10, 2026 through Thursday, August 20, 2026 UTC

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• HAZARDS6/3405 2026-08-10 16:03Z – 2026-08-20 05:00Z SFC–5,000 ft

  BROWNSVILLE, TX, Monday, August 10, 2026 through Thursday, August 20, 2026 UTC

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• HAZARDS6/4962 2026-08-13 18:15Z – 2026-08-20 18:00Z SFC–2,000 ft

  YOUNGSPORT, TX, Thursday, August 13, 2026 through Thursday, August 20, 2026 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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• UAS PUBLIC GATHERING6/3174 2026-08-15 11:00Z – 2026-08-17 02:00Z SFC–400 ft

  Memphis, TN, Saturday, August 15, 2026 through Monday, August 17, 2026 UTC

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• UAS PUBLIC GATHERING6/3355 2026-08-15 11:00Z – 2026-08-17 02:00Z SFC–400 ft

  Memphis, TN, Saturday, August 15, 2026 through Monday, August 17, 2026 UTC

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• SPACE OPERATIONS6/4810 2026-08-17 00:35Z – 2026-08-17 02:03Z SFC–180 ft

  Cape Canaveral, FL, Sunday, August 16, 2026 Local

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• SPACE OPERATIONS6/4819 2026-08-17 00:35Z – 2026-08-17 02:03Z SFC–180 ft

  Cape Canaveral, FL, Sunday, August 16, 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