Unstable approach — FFL938

FFL938 (Efficiency Aloft) was operating from KCRQ to KSTS on 2026-08-20. SkyMeter detected a low approach-stability score at Charles M. Schulz Sonoma County Airport (KSTS) on runway 14 at 01:20 UTC. Trace data at the event: 1231 ft AGL, 151 kt GS. Approach stability score: 34/100. 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 11 kt wind, 1 kt crosswind component, 14,484 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.

• SECURITY6/6491 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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• HAZARDS6/7246 2026-07-21 05:00Z – 2026-08-21 03:00Z SFC–10,500 ft

  20NM N INDEPENDENCE, CA, Tuesday, July 21, 2026 through Friday, August 21, 2026 UTC

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• HAZARDS6/7372 2026-07-21 13:38Z – 2026-08-22 03:00Z SFC–10,500 ft

  20NM N INDEPENDENCE, CA, Tuesday, July 21, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3138 2026-08-09 17:20Z – 2026-08-22 15:00Z SFC–15,000 ft

  15NM SE BIG PINE, CA, Sunday, August 9, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3157 2026-08-10 01:18Z – 2026-08-23 15:00Z SFC–7,500 ft

  8NM SE BIG SUR, CA, Monday, August 10, 2026 through Sunday, August 23, 2026 UTC

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• HAZARDS6/3480 2026-08-10 18:36Z – 2026-08-23 15:00Z SFC–7,500 ft

  8NM SE BIG SUR, CA, Monday, August 10, 2026 through Sunday, August 23, 2026 UTC

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• HAZARDS6/4807 2026-08-13 03:30Z – 2026-08-20 03:30Z SFC–8,500 ft

  8NM SE BIG SUR, CA, Thursday, August 13, 2026 through Thursday, August 20, 2026 UTC

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• HAZARDS6/5070 2026-08-14 13:00Z – 2026-08-27 03:00Z SFC–8,500 ft

  8NM SE BIG SUR, CA, Friday, August 14, 2026 through Thursday, August 27, 2026 UTC

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• HAZARDS6/5246 2026-08-16 02:15Z – 2026-08-30 04:00Z SFC–13,000 ft

  37NM SE SOUTH LAKE TAHOE, CA, Sunday, August 16, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5252 2026-08-16 13:00Z – 2026-08-30 04:00Z SFC–13,000 ft

  37NM SE SOUTH LAKE TAHOE, CA, Sunday, August 16, 2026 through Sunday, August 30, 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.

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