Unstable approach — PXT578

KAPC · 18R

2026-07-19 20:01 UTC· KSJC → KAPC· N920 LLC, JAM CELLARS INVESTMENTS LLC· C25B

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PXT578 (N920) was operating from KSJC to KAPC on 2026-07-19. SkyMeter detected a low approach-stability score at Napa County Airport (KAPC) on runway 18R at 20:01 UTC. Trace data at the event: 1125 ft AGL, 139 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 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)
  • SECURITY6/4052 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    San Jose, CA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4054 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    San Jose, CA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4060 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    Oakland, CA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4061 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    BERKLEY, CA, Monday, June 1, 2026 through Tuesday, July 21, 2026 Local

    View FAA NOTAM →
  • SECURITY6/4204 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft

    Santa Clara, CA, Monday, June 1, 2026 through Monday, July 20, 2026 Local

    View FAA NOTAM →
  • SECURITY6/7983 2026-07-05 14:07Z – 2026-07-21 06:59Z SFC–400 ft

    San Jose, CA

    View FAA NOTAM →
  • SECURITY6/7984 2026-07-05 14:07Z – 2026-07-21 06:59Z SFC–400 ft

    Oakland, CA

    View FAA NOTAM →
  • SECURITY6/7985 2026-07-05 14:07Z – 2026-07-21 06:59Z SFC–400 ft

    San Jose, CA

    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 18R
  • 1125 ft AGL at event
  • 139 kt ground speed
  • 0 fpm vertical
  • Approach stability 32/100
  • 4 kt wind
  • 2 kt crosswind component
  • 16,093 m visibility
  • METAR KAPC 312354Z 25017G24KT 10SM CLR 21/12 A2989 RMK AO2 SLP112 T02110122 10228 20167 56013

Flight context

  • PXT578
  • N920
  • C25B
  • KSJC → KAPC
  • 2026-07-19 20:01 UTC
  • KAPC runway 18R

All events on this flight

Unstable approach 20:01:00 UTC · KAPC runway 18R · 1,125 ft AGL · 139 kt GS
Unstable approach 20:01:00 UTC · KAPC runway 19R · 1,125 ft AGL · 139 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· KAPC