Unstable approach — AIP3596

KBZN · 12

2026-08-31 22:06 UTC· KBIL → KBZN· ALPINE AVIATION INC· B190

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AIP3596 (Alpine Aviation) was operating from KBIL to KBZN on 2026-08-31. SkyMeter detected a low approach-stability score at Gallatin Field (KBZN) on runway 12 at 22:06 UTC. Trace data at the event: 5516 ft AGL, 217 kt GS. Approach stability score: 50/100. 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, 2 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)
  • HAZARDS6/6723 2026-08-20 14:00Z – 2026-09-03 04:00Z SFC–9,000 ft

    16NM E BIG TIMBER, MT, Thursday, August 20, 2026 through Thursday, September 3, 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 12
  • 5516 ft AGL at event
  • 217 kt ground speed
  • 0 fpm vertical
  • Approach stability 50/100
  • 4 kt wind
  • 2 kt crosswind component
  • 16,093 m visibility
  • KBZN 160556Z 25009KT 10SM CLR 12/05 A3006 RMK AO2 SLP160 T01220050 10200 20111 51013 $

Flight context

  • AIP3596
  • Alpine Aviation
  • B190
  • KBIL → KBZN
  • 2026-08-31 22:06 UTC
  • KBZN runway 12

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· KBZN