Unstable approach — ASA467

KBOI · 28R

2026-06-01 21:17 UTC· KSEA → KBOI· ALASKA AIRLINES INC· B739

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ASA467 (Alaska Airlines) was operating from KSEA to KBOI on 2026-06-01. SkyMeter detected a low approach-stability score at Boise Air Terminal/Gowen Field (KBOI) on runway 28R at 21:17 UTC. Trace data at the event: 3928 ft AGL, 164 kt GS. Approach stability score: 51/100. 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 8 kt wind, 1 kt crosswind component, 16,093 m visibility. 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.

Active FAA TFR during this flight

Source: FAA TFR archive (hourly snapshot)
  • SECURITY6/4158 2026-06-01 06:00Z – 2026-07-21 05:59Z SFC–400 ft

    MERIDIAN, ID, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4011 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    BELLEVUE, WA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4033 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    RENTON, WA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4034 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    Renton, WA, Monday, June 1, 2026 through Monday, July 20, 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 28R
  • 3928 ft AGL at event
  • 164 kt ground speed
  • 0 fpm vertical
  • Approach stability 51/100
  • 8 kt wind
  • 1 kt crosswind component
  • 16,093 m visibility
  • KBOI 161453Z AUTO 13006KT 10SM CLR 08/M01 A3054 RMK AO2 SLP340 T00831011 57002

Flight context

  • ASA467
  • Alaska Airlines
  • B739
  • KSEA → KBOI
  • 2026-06-01 21:17 UTC
  • KBOI runway 28R

All events on this flight

Unstable approach 21:17:46 UTC · KBOI runway 28R · 3,928 ft AGL · 164 kt GS
Unstable approach 21:17:46 UTC · KBOI runway 28R · 3,928 ft AGL · 164 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· KBOI