Unstable approach — ASA35

KCNO · 21

2026-09-04 22:23 UTC· ALASKA AIRLINES INC· B39M

ASA35 (Alaska Airlines) was inbound to KCNO on 2026-09-04. SkyMeter detected a low approach-stability score at Chino Airport (KCNO) on runway 21 at 22:23 UTC. Trace data at the event: 1757 ft AGL, 155 kt GS. Approach stability score: 43/100. 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, 3 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)
  • SECURITY6/4812 2026-07-15 07:00Z – 2027-07-14 06:59Z SFC–17,999 ft

    El Centro, CA, Wednesday, July 15, 2026 through Tuesday, July 13, 2027 Local

    View FAA NOTAM →
  • SECURITY6/0708 2026-08-01 00:01Z – 2027-08-01 23:59Z SFC–400 ft

    Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC

    View FAA NOTAM →
  • HAZARDS6/7128 2026-08-23 13:00Z – 2026-09-06 03:00Z SFC–14,500 ft

    26NM NE RUIDOSO, NM, Sunday, August 23, 2026 through Sunday, September 6, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7347 2026-08-24 13:00Z – 2026-09-07 04:00Z SFC–10,000 ft

    35NM SW PROVO, UT, Monday, August 24, 2026 through Monday, September 7, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7422 2026-08-24 14:30Z – 2026-09-08 05:00Z SFC–12,500 ft

    26NM NE RUIDOSO, NM, Monday, August 24, 2026 through Tuesday, September 8, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7530 2026-08-24 17:00Z – 2026-09-06 03:00Z SFC–10,000 ft

    35NM SW PROVO, UT, Monday, August 24, 2026 through Sunday, September 6, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7463 2026-08-25 12:00Z – 2026-09-08 08:00Z SFC–16,500 ft

    1NM NE OURAY, CO, Tuesday, August 25, 2026 through Tuesday, September 8, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7654 2026-08-25 13:00Z – 2026-09-07 04:00Z SFC–10,000 ft

    35NM SW PROVO, UT, Tuesday, August 25, 2026 through Monday, September 7, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7718 2026-08-25 14:00Z – 2026-09-08 04:00Z SFC–8,000 ft

    4.5 NM NE BAGDAD, AZ, Tuesday, August 25, 2026 through Tuesday, September 8, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/7986 2026-08-25 21:45Z – 2026-09-07 04:00Z SFC–12,000 ft

    32NM SW TOOELE, UT, Tuesday, August 25, 2026 through Monday, September 7, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8102 2026-08-26 02:25Z – 2026-09-09 02:00Z SFC–5,500 ft

    1NM NW PALO PINTO, TX, Wednesday, August 26, 2026 through Wednesday, September 9, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8103 2026-08-26 12:00Z – 2026-09-09 02:00Z SFC–4,000 ft

    21NM NW BROKEN BOW, OK, Wednesday, August 26, 2026 through Wednesday, September 9, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8069 2026-08-26 14:00Z – 2026-09-09 04:00Z SFC–14,000 ft

    26NM SE ALBUQUERQUE, NM, Wednesday, August 26, 2026 through Wednesday, September 9, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8332 2026-08-26 17:45Z – 2026-09-05 04:00Z SFC–11,000 ft

    51NM NE FALLON, NV, Wednesday, August 26, 2026 through Saturday, September 5, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8445 2026-08-26 20:55Z – 2026-09-09 02:00Z SFC–5,500 ft

    1NM NW PALO PINTO, TX, Wednesday, August 26, 2026 through Wednesday, September 9, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8507 2026-08-27 03:15Z – 2026-09-05 03:00Z SFC–11,000 ft

    51NM NE FALLON, NV, Thursday, August 27, 2026 through Saturday, September 5, 2026 UTC

    View FAA NOTAM →
  • UAS PUBLIC GATHERING6/7351 2026-08-27 12:00Z – 2026-10-13 03:00Z SFC–400 ft

    Timonium, MD, Thursday, August 27, 2026 through Tuesday, October 13, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8502 2026-08-27 14:00Z – 2026-09-09 03:00Z SFC–15,000 ft

    48NM NW TAOS, NM, Thursday, August 27, 2026 through Wednesday, September 9, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8590 2026-08-27 18:00Z – 2026-09-09 03:00Z SFC–13,500 ft

    13NM N SANTA FE, NM, Thursday, August 27, 2026 through Wednesday, September 9, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8806 2026-08-28 15:04Z – 2026-09-12 03:00Z SFC–15,000 ft

    30NM W TAOS, NM, Friday, August 28, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8829 2026-08-28 15:45Z – 2026-09-11 02:00Z SFC–5,500 ft

    4NM NW MINERAL WELLS, TX, Friday, August 28, 2026 through Friday, September 11, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8888 2026-08-28 23:05Z – 2026-09-12 03:00Z SFC–14,000 ft

    28NM SE ALBUQUERQUE, NM, Friday, August 28, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8889 2026-08-28 23:25Z – 2026-09-12 04:00Z SFC–13,500 ft

    15NM SW LAS VEGAS, NM, Friday, August 28, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/9082 2026-08-29 13:00Z – 2026-09-12 04:00Z SFC–13,500 ft

    15NM SW LAS VEGAS, NM, Saturday, August 29, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/8870 2026-08-29 14:00Z – 2026-09-12 03:00Z SFC–15,000 ft

    30NM W TAOS, NM, Saturday, August 29, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/9129 2026-08-29 15:15Z – 2026-09-12 02:00Z SFC–5,500 ft

    4NM NW MINERAL WELLS, TX, Saturday, August 29, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/9211 2026-08-30 11:30Z – 2026-09-13 02:00Z SFC–5,500 ft

    4NM NW MINERAL WELLS, TX, Sunday, August 30, 2026 through Sunday, September 13, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/9161 2026-08-30 14:00Z – 2026-09-12 04:00Z SFC–13,000 ft

    42NM SE SHOW LOW, AZ, Sunday, August 30, 2026 through Saturday, September 12, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/9626 2026-09-01 02:00Z – 2026-09-15 02:00Z SFC–5,500 ft

    4NM NW MINERAL WELLS, TX, Tuesday, September 1, 2026 through Tuesday, September 15, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/0685 2026-09-03 03:30Z – 2026-09-17 03:00Z SFC–3,500 ft

    7NM SE MISSION VIEJO, CA, Thursday, September 3, 2026 through Thursday, September 17, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/0784 2026-09-03 14:30Z – 2026-09-17 03:00Z SFC–3,500 ft

    7NM SE MISSION VIEJO, CA, Thursday, September 3, 2026 through Thursday, September 17, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/0800 2026-09-03 14:50Z – 2026-09-06 02:30Z SFC–14,000 ft

    BAILEY, CO, Thursday, September 3, 2026 through Sunday, September 6, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/0953 2026-09-04 12:00Z – 2026-09-18 08:00Z SFC–13,000 ft

    1NM NE OURAY, CO, Friday, September 4, 2026 through Friday, September 18, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/0920 2026-09-04 14:00Z – 2026-09-18 02:00Z SFC–5,500 ft

    4NM NW MINERAL WELLS, TX, Friday, September 4, 2026 through Friday, September 18, 2026 UTC

    View FAA NOTAM →
  • AIR SHOWS/SPORTS6/8828 2026-09-04 15:00Z – 2026-09-04 22:00Z SFC–17,000 ft

    Branson, MO, Friday, September 4, 2026 UTC

    View FAA NOTAM →
  • HAZARDS6/1127 2026-09-04 15:25Z – 2026-09-11 04:00Z SFC–12,000 ft

    10NM SW TELLURIDE, CO, Friday, September 4, 2026 through Friday, September 11, 2026 UTC

    View FAA NOTAM →
  • SECURITY6/9207 2026-09-04 19:00Z – 2026-09-05 05:59Z SFC–400 ft

    Santa FE, NM, Friday, September 4, 2026 through Friday, September 4, 2026 Local

    View FAA NOTAM →
  • VIP6/0927 2026-09-04 20:30Z – 2026-09-07 21:15Z SFC–4,999 ft

    Cincinnati, OH, Friday, September 4, 2026 through Monday, September 7, 2026 Local

    View FAA NOTAM →
  • VIP6/0241 2026-09-04 21:15Z – 2026-09-07 20:00Z SFC–4,999 ft

    Cincinnati, OH, Friday, September 4, 2026 through Monday, September 7, 2026 Local

    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 21
  • 1757 ft AGL at event
  • 155 kt ground speed
  • 0 fpm vertical
  • Approach stability 43/100
  • 6 kt wind
  • 3 kt crosswind component
  • 16,093 m visibility
  • METAR KCNO 160453Z AUTO 25005KT 10SM 19/15 A2995 RMK AO2 SLP136 T01890150 $

Flight context

  • ASA35
  • Alaska Airlines
  • B39M
  • 2026-09-04 22:23 UTC
  • KCNO runway 21

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· KCNO