Squawk 7700 transmission — SWA4180

2025-09-24 01:43 UTC· KSMF → KSAN· SOUTHWEST AIRLINES CO· B737

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SWA4180 (Southwest Airlines) was operating from KSMF to KSAN on 2025-09-24. SkyMeter recorded a 7700 transponder transmission at 01:43 UTC. Code 7700 indicates a general emergency declaration (e.g. engine, medical, smoke). A sustained transmission is normally accompanied by ATC priority handling. Trace data at the event: 20043 ft AGL, 271 kt GS. METAR at the time reported 3 kt wind, 3 kt crosswind component. Detection algorithm and known limitations: see SkyMeter methodology.

Pilot review data

  • 20043 ft AGL at event
  • 271 kt ground speed
  • 0 fpm vertical
  • 3 kt wind
  • 3 kt crosswind component

Flight context

  • SWA4180
  • Southwest Airlines
  • B737
  • KSMF → KSAN
  • 2025-09-24 01:43 UTC

All events on this flight

Squawk 7700 transmission 01:43:02 UTC · · 20,043 ft AGL · 271 kt GS
Squawk 7700 transmission 01:43:02 UTC · · 20,043 ft AGL · 271 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