Unstable approach — N400XC

N400XC (N400xc Leasing) was operating from KIXD to KAPC on 2026-08-12. SkyMeter detected a low approach-stability score at Napa County Airport (KAPC) on runway 19R at 18:14 UTC. Trace data at the event: 1142 ft AGL, 118 kt GS. Approach stability score: 44/100. 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, 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.

• SECURITY6/3475 2026-03-08 09:00Z – 2026-11-01 09:59Z SFC–180 ft

  BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local

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• SECURITY6/5797 2026-04-03 00:01Z – 2026-09-28 23:59Z SFC–400 ft

  SACRAMENTO, CA, Thursday, April 2, 2026 through Monday, September 28, 2026 Local

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• SECURITY6/6491 2026-07-20 07:01Z – 2026-09-16 06:59Z SFC–1,499 ft

  Concord, CA, Monday, July 20, 2026 through Tuesday, September 15, 2026 Local

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• HAZARDS6/0722 2026-08-01 13:00Z – 2026-08-14 04:00Z SFC–14,000 ft

  9NM S ELY, NV, Saturday, August 1, 2026 through Friday, August 14, 2026 UTC

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• HAZARDS6/1038 2026-08-03 13:00Z – 2026-08-16 04:00Z SFC–14,000 ft

  9NM S ELY, NV, Monday, August 3, 2026 through Sunday, August 16, 2026 UTC

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• HAZARDS6/1461 2026-08-04 12:00Z – 2026-08-18 04:00Z SFC–13,000 ft

  4NM W RICHFIELD, UT, Tuesday, August 4, 2026 through Tuesday, August 18, 2026 UTC

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• HAZARDS6/1464 2026-08-04 12:00Z – 2026-08-18 04:00Z SFC–13,000 ft

  4NM W RICHFIELD, UT, Tuesday, August 4, 2026 through Tuesday, August 18, 2026 UTC

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• HAZARDS6/1462 2026-08-04 13:00Z – 2026-09-01 04:00Z SFC–15,000 ft

  20NM SW PUEBLO, CO, Tuesday, August 4, 2026 through Tuesday, September 1, 2026 UTC

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• HAZARDS6/1795 2026-08-04 20:57Z – 2026-08-18 04:00Z SFC–6,000 ft

  27NM NE STOCKTON, CA, Tuesday, August 4, 2026 through Tuesday, August 18, 2026 UTC

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• HAZARDS6/1961 2026-08-05 13:00Z – 2026-08-19 04:00Z SFC–14,000 ft

  9NM S ELY, NV, Wednesday, August 5, 2026 through Wednesday, August 19, 2026 UTC

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• HAZARDS6/2433 2026-08-05 21:49Z – 2026-08-15 04:00Z SFC–6,000 ft

  27NM NE STOCKTON, CA, Wednesday, August 5, 2026 through Saturday, August 15, 2026 UTC

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• HAZARDS6/2767 2026-08-07 12:00Z – 2026-08-21 04:00Z SFC–16,500 ft

  1NM NE OURAY, CO, Friday, August 7, 2026 through Friday, August 21, 2026 UTC

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• HAZARDS6/2889 2026-08-07 19:58Z – 2026-08-21 04:00Z SFC–13,000 ft

  4NM W RICHFIELD, UT, Friday, August 7, 2026 through Friday, August 21, 2026 UTC

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• HAZARDS6/3100 2026-08-09 02:44Z – 2026-08-22 04:00Z SFC–6,000 ft

  7NM E GRASS VALLEY, CA, Sunday, August 9, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3101 2026-08-09 13:00Z – 2026-08-24 03:00Z SFC–15,000 ft

  24NM SW PUEBLO, CO, Sunday, August 9, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3679 2026-08-11 12:00Z – 2026-08-25 08:00Z SFC–16,500 ft

  1NM NE OURAY, CO, Tuesday, August 11, 2026 through Tuesday, August 25, 2026 UTC

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• HAZARDS6/3659 2026-08-11 13:00Z – 2026-08-24 03:00Z SFC–14,000 ft

  26NM SW PRICE, UT, Tuesday, August 11, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/4085 2026-08-12 04:00Z – 2026-08-25 04:00Z SFC–13,000 ft

  4NM W RICHFIELD, UT, Wednesday, August 12, 2026 through Tuesday, August 25, 2026 UTC

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• HAZARDS6/4110 2026-08-12 14:00Z – 2026-08-26 03:00Z SFC–12,500 ft

  12NM SE DRESSLERVILLE, NV, Wednesday, August 12, 2026 through Wednesday, August 26, 2026 UTC

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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.

All events on this flight

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