Go-around — UAL1939

KSFO · 28L

2026-08-25 17:54 UTC· KPDX → KSFO· UNITED AIRLINES INC· B739

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UAL1939 (United Airlines) was operating from KPDX to KSFO on 2026-08-25. SkyMeter detected a go-around at San Francisco International Airport (KSFO) on runway 28L at 17:54 UTC. Trace data at the event: 180 ft AGL, 139 kt GS, 0 fpm vertical. METAR at the time reported 12 kt wind, 2 kt crosswind component, 16,093 m visibility. A go-around is a discontinued landing approach in which the pilot adds power and climbs back to a safe altitude before re-attempting the approach or proceeding to an alternate. It is a routine safety response, not an emergency, and is taught as the standard reaction to any unstable approach. Detection algorithm and known limitations: see SkyMeter methodology.

Active FAA TFR during this flight

Source: FAA TFR archive (hourly snapshot)
  • HAZARDS6/4084 2026-08-12 00:45Z – 2026-08-27 04:00Z SFC–10,500 ft

    40NM SE PORTLAND, OR, Wednesday, August 12, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4091 2026-08-12 01:45Z – 2026-08-27 04:00Z SFC–8,500 ft

    13NM S COTTAGE GROVE, OR, Wednesday, August 12, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/4704 2026-08-13 00:30Z – 2026-08-27 04:00Z SFC–10,500 ft

    40NM SE PORTLAND, OR, Thursday, August 13, 2026 through Thursday, August 27, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5051 2026-08-14 00:45Z – 2026-08-29 03:00Z SFC–8,000 ft

    5NM E GRANTS PASS, OR, Friday, August 14, 2026 through Saturday, August 29, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5072 2026-08-14 05:00Z – 2026-08-28 05:00Z SFC–8,000 ft

    5NM E GRANTS PASS, OR, Friday, August 14, 2026 through Friday, August 28, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5170 2026-08-15 05:00Z – 2026-08-29 13:00Z SFC–6,000 ft

    7NM SW MEDFORD, OR, Saturday, August 15, 2026 through Saturday, August 29, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5466 2026-08-17 05:00Z – 2026-08-31 05:00Z SFC–10,500 ft

    40NM SE PORTLAND, OR, Monday, August 17, 2026 through Monday, August 31, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/5801 2026-08-17 19:40Z – 2026-08-31 04:00Z SFC–10,500 ft

    40NM SE PORTLAND, OR, Monday, August 17, 2026 through Monday, August 31, 2026 UTC

    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 28L
  • 180 ft AGL at event
  • 139 kt ground speed
  • 0 fpm vertical
  • 12 kt wind
  • 2 kt crosswind component
  • 16,093 m visibility
  • KSFO 160756Z 23006KT 10SM FEW008 SCT017 15/12 A2992 RMK AO2 SLP130 T01500117 402280133

Flight context

  • UAL1939
  • United Airlines
  • B739
  • KPDX → KSFO
  • 2026-08-25 17:54 UTC
  • KSFO runway 28L

All events on this flight

Go-around 17:54:35 UTC · KSFO runway 28L · 180 ft AGL · 139 kt GS
Go-around 17:54:35 UTC · KSFO runway 28L · 180 ft AGL · 139 kt GS

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· KSFO