Diversion — ASA640

KPSC · 03L

2026-03-13 18:03 UTC· KTPA → KPSC· ALASKA AIRLINES INC· B39M

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ASA640 (Alaska Airlines) was operating from KTPA to KSEA (Seattle Tacoma International Airport) on 2026-03-13. SkyMeter detected a diversion to Tri Cities Airport (KPSC) on runway 03L at 18:03 UTC. Peak cruise altitude FL351, turnaround area near Elkhart, US. Approach stability score: 66/100. Scores in this band occur on roughly 10-15% of approaches at this runway, with multiple gates outside the per-runway envelope. METAR at the time reported 4 kt wind, 3 kt crosswind component, 16,093 m visibility. Detection algorithm and known limitations: see SkyMeter methodology.

Active FAA TFR during this flight

Source: FAA TFR archive (hourly snapshot)
  • SECURITY5/0601 2025-11-30 19:00Z – 2026-05-31 18:59Z SFC–400 ft

    Los Angeles, CA, Sunday, November 30, 2025 through Sunday, May 31, 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 →
  • SECURITY6/4165 2026-02-14 07:00Z – 2026-08-15 06:59Z SFC–400 ft

    Nogales, AZ, Saturday, February 14, 2026 through Friday, August 14, 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 →
  • SECURITY6/4240 2026-03-08 08:00Z – 2026-11-01 07:00Z SFC–180 ft

    SAN ANGELO, TX, Sunday, March 8, 2026 through Sunday, November 1, 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 03L
  • 398 ft AGL at event
  • 120 kt ground speed
  • 0 fpm vertical
  • Approach stability 66/100
  • 4 kt wind
  • 3 kt crosswind component
  • 16,093 m visibility
  • METAR KPSC 270553Z AUTO 34004KT 10SM CLR 07/04 A3010 RMK AO2 SLP191 60000 T00720039 10200 20072 58001

Flight context

  • ASA640
  • Alaska Airlines
  • B39M
  • KTPA → KPSC
  • 2026-03-13 18:03 UTC
  • KPSC runway 03L

All events on this flight

Diversion 18:03:37 UTC · KPSC runway 03L · 398 ft AGL · 120 kt GS
Diversion 18:03:37 UTC · KPSC runway 03L · 398 ft AGL · 120 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· KPSC