Unstable approach — N581BC

N581BC (Bear AIR II) was operating from KPDX to K4SD on 2026-08-27. SkyMeter detected a low approach-stability score at Reno-Stead Airport (K4SD) on runway 26 at 18:18 UTC. Trace data at the event: 6137 ft AGL, 126 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 7 kt wind, 5 kt crosswind component. 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.

• HAZARDS6/5053 2026-08-14 02:15Z – 2026-08-29 04:00Z SFC–11,000 ft

  15NM N KLAMATH FALLS, OR, Friday, August 14, 2026 through Saturday, August 29, 2026 UTC

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• HAZARDS6/5112 2026-08-14 16:30Z – 2026-08-29 03:00Z SFC–9,500 ft

  19NM NW JOHN DAY, OR, Friday, August 14, 2026 through Saturday, August 29, 2026 UTC

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• HAZARDS6/5190 2026-08-15 04:00Z – 2026-08-29 04:00Z SFC–10,500 ft

  20NM SW THE DALLES, OR, Saturday, August 15, 2026 through Saturday, August 29, 2026 UTC

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• HAZARDS6/5212 2026-08-15 15:00Z – 2026-08-30 04:00Z SFC–9,500 ft

  19NM NW JOHN DAY, OR, Saturday, August 15, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5242 2026-08-15 23:15Z – 2026-08-29 04:00Z SFC–9,500 ft

  15NM NW RENO, NV, Saturday, August 15, 2026 through Saturday, August 29, 2026 UTC

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• HAZARDS6/5466 2026-08-17 05:00Z – 2026-08-31 05:00Z SFC–10,500 ft

  40NM SE PORTLAND, OR, Monday, August 17, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/5470 2026-08-17 13:00Z – 2026-08-30 04:00Z SFC–11,000 ft

  13NM S CHRISTMAS VALLEY, OR, Monday, August 17, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5801 2026-08-17 19:40Z – 2026-08-31 04:00Z SFC–10,500 ft

  40NM SE PORTLAND, OR, Monday, August 17, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/5892 2026-08-18 04:00Z – 2026-08-31 13:00Z SFC–10,500 ft

  41NM SE PORTLAND, OR, Tuesday, August 18, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/5897 2026-08-18 14:00Z – 2026-08-31 02:00Z SFC–7,500 ft

  15NM NW RENO, NV, Tuesday, August 18, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/6958 2026-08-21 04:00Z – 2026-09-03 04:00Z SFC–11,000 ft

  15NM N KLAMATH FALLS, OR, Friday, August 21, 2026 through Thursday, September 3, 2026 UTC

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• HAZARDS6/7093 2026-08-22 03:00Z – 2026-09-04 04:00Z SFC–9,000 ft

  12NM NE PRINEVILLE, OR, Saturday, August 22, 2026 through Friday, September 4, 2026 UTC

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• HAZARDS6/7127 2026-08-23 05:30Z – 2026-09-06 03:00Z SFC–11,500 ft

  1NM W RENO, NV, Sunday, August 23, 2026 through Sunday, September 6, 2026 UTC

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• HAZARDS6/7283 2026-08-23 16:00Z – 2026-09-06 03:00Z SFC–11,500 ft

  1NM W RENO, NV, Sunday, August 23, 2026 through Sunday, September 6, 2026 UTC

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• HAZARDS6/7609 2026-08-24 23:37Z – 2026-09-07 03:00Z SFC–8,000 ft

  15NM NE ALTURAS, CA, Monday, August 24, 2026 through Monday, September 7, 2026 UTC

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• HAZARDS6/7559 2026-08-25 03:00Z – 2026-08-28 13:00Z SFC–7,000 ft

  37NM NE PRINEVILLE, OR, Tuesday, August 25, 2026 through Friday, August 28, 2026 UTC

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• HAZARDS6/7653 2026-08-25 03:00Z – 2026-09-08 04:00Z SFC–10,500 ft

  20NM SW THE DALLES, OR, Tuesday, August 25, 2026 through Tuesday, September 8, 2026 UTC

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• HAZARDS6/7708 2026-08-25 13:13Z – 2026-09-08 03:00Z SFC–8,000 ft

  15NM NE ALTURAS, CA, Tuesday, August 25, 2026 through Tuesday, September 8, 2026 UTC

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• HAZARDS6/7667 2026-08-25 14:00Z – 2026-08-31 04:00Z SFC–11,500 ft

  1NM W RENO, NV, Tuesday, August 25, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/7989 2026-08-25 22:30Z – 2026-09-08 03:00Z SFC–11,000 ft

  14NM NE CEDARVILLE, CA, Tuesday, August 25, 2026 through Tuesday, September 8, 2026 UTC

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• HAZARDS6/8105 2026-08-26 03:30Z – 2026-09-08 03:00Z SFC–11,000 ft

  14NM E CEDARVILLE, CA, Wednesday, August 26, 2026 through Tuesday, September 8, 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