Unstable approach — AIP1598

KBIL · 25

2026-08-29 00:47 UTC· ALPINE AVIATION INC· B190

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AIP1598 (Alpine Aviation) was inbound to KBIL on 2026-08-29. SkyMeter detected a low approach-stability score at Billings Logan International Airport (KBIL) on runway 25 at 00:47 UTC. Trace data at the event: 4689 ft AGL, 148 kt GS. Approach stability score: 32/100. Scores below 50 occur on under 10% of approaches at this runway and indicate the v2 scorer flagged the approach as highly anomalous (three or more gates exceeded the runway's P90 envelope simultaneously). METAR at the time reported 6 kt wind, 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)
  • HAZARDS6/5136 2026-08-14 22:00Z – 2026-08-29 04:00Z SFC–10,000 ft

    10NM E HAMILTON, MT, Friday, August 14, 2026 through Saturday, August 29, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/6599 2026-08-20 13:00Z – 2026-09-03 03:00Z SFC–11,000 ft

    21NM SE HAMILTON, MT, Thursday, August 20, 2026 through Thursday, September 3, 2026 UTC

    View FAA NOTAM →
  • 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 →
  • HAZARDS6/7337 2026-08-24 14:00Z – 2026-09-08 03:30Z SFC–10,000 ft

    11NM SE HAMILTON, MT, Monday, August 24, 2026 through Tuesday, September 8, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7668 2026-08-25 14:00Z – 2026-09-08 03:30Z SFC–10,000 ft

    11NM SE HAMILTON, MT, Tuesday, August 25, 2026 through Tuesday, September 8, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8106 2026-08-26 14:00Z – 2026-09-10 03:30Z SFC–12,500 ft

    11NM SE HAMILTON, MT, Wednesday, August 26, 2026 through Thursday, September 10, 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 25
  • 4689 ft AGL at event
  • 148 kt ground speed
  • 0 fpm vertical
  • Approach stability 32/100
  • 6 kt wind
  • 0 kt crosswind component
  • 16,093 m visibility
  • KBIL 161753Z 03013G16KT 10SM FEW095 FEW200 17/03 A3024 RMK AO2 SLP225 T01720028 10172 20072 51015

Flight context

  • AIP1598
  • Alpine Aviation
  • B190
  • 2026-08-29 00:47 UTC
  • KBIL runway 25

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· KBIL