Go-around — ASA390

KBOS · 04R

2026-04-14 20:01 UTC· KSAN → KBOS· ALASKA AIRLINES INC· B739

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ASA390 (Alaska Airlines) was operating from KSAN to KBOS on 2026-04-14. SkyMeter detected a go-around at General Edward Lawrence Logan International Airport (KBOS) on runway 04R at 20:01 UTC. Trace data at the event: 240 ft AGL, 176 kt GS, 0 fpm vertical. METAR at the time reported 19 kt wind, 6 kt crosswind component, 6,437 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)
  • SECURITY5/2811 2025-10-20 12:00Z – 2026-10-20 12:00Z SFC–1,000 ft

    NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/0091 2026-01-04 00:01Z – 2026-07-04 23:59Z SFC–500 ft

    Coyote Wells, CA, Saturday, January 3, 2026 through Saturday, July 4, 2026 Local

    View FAA NOTAM →
  • SECURITY6/0092 2026-01-04 00:01Z – 2026-07-04 23:59Z SFC–500 ft

    CALEXICO, CA, Saturday, January 3, 2026 through Saturday, July 4, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4160 2026-02-14 08:00Z – 2026-08-15 06:59Z SFC–400 ft

    Chula Vista, CA, Saturday, February 14, 2026 through Friday, August 14, 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 04R
  • 240 ft AGL at event
  • 176 kt ground speed
  • 0 fpm vertical
  • 19 kt wind
  • 6 kt crosswind component
  • 6,437 m visibility
  • KBOS 210654Z 36011KT 4SM BR OVC007 14/14 A3001 RMK AO2 SLP161 P0001 T01440139

Flight context

  • ASA390
  • Alaska Airlines
  • B739
  • KSAN → KBOS
  • 2026-04-14 20:01 UTC
  • KBOS runway 04R

All events on this flight

Go-around 20:01:08 UTC · KBOS runway 04R · 240 ft AGL · 176 kt GS
Go-around 20:10:41 UTC · KBOS runway 04R · 535 ft AGL · 199 kt GS
Go-around 20:01:08 UTC · KBOS runway 04R · 240 ft AGL · 176 kt GS
Go-around 20:10:41 UTC · KBOS runway 04R · 535 ft AGL · 199 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· KBOS