Unstable approach — ACA171

ACA171 (Air Canada) was operating from CYYZ to CYEG on 2026-08-28. SkyMeter detected a low approach-stability score at Edmonton International Airport (CYEG) on runway 12 at 23:19 UTC. Trace data at the event: 3433 ft AGL, 153 kt GS. Approach stability score: 35/100. 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, 32,187 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.

• SECURITY6/4348 2026-03-08 07:00Z – 2026-11-01 06:59Z SFC–2,400 ft

  GRAND FORKS AFB, ND, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local

  View FAA NOTAM →
• HAZARDS6/5929 2026-08-18 12:00Z – 2026-08-31 03:00Z SFC–13,000 ft

  36NM SW BUTTE, MT, Tuesday, August 18, 2026 through Monday, August 31, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6588 2026-08-20 10:00Z – 2026-09-02 02:00Z SFC–5,500 ft

  25NM NW ELY, MN, Thursday, August 20, 2026 through Wednesday, September 2, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6589 2026-08-20 10:00Z – 2026-09-02 02:00Z SFC–5,500 ft

  13NM N ELY, MN, Thursday, August 20, 2026 through Wednesday, September 2, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6625 2026-08-20 10:00Z – 2026-09-02 02:00Z SFC–5,500 ft

  13NM N ELY, MN, Thursday, August 20, 2026 through Wednesday, September 2, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6622 2026-08-20 10:00Z – 2026-09-02 02:00Z SFC–5,500 ft

  25NM NW ELY, MN, Thursday, August 20, 2026 through Wednesday, September 2, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6599 2026-08-20 13:00Z – 2026-09-03 03:00Z SFC–11,000 ft

  21NM SE HAMILTON, MT, Thursday, August 20, 2026 through Thursday, September 3, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6723 2026-08-20 14:00Z – 2026-09-03 04:00Z SFC–9,000 ft

  16NM E BIG TIMBER, MT, Thursday, August 20, 2026 through Thursday, September 3, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/6953 2026-08-21 10:00Z – 2026-09-02 02:00Z SFC–5,500 ft

  13NM N ELY, MN, Friday, August 21, 2026 through Wednesday, September 2, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/8109 2026-08-26 14:00Z – 2026-09-09 03:30Z SFC–11,000 ft

  32NM SE BILLINGS, MT, Wednesday, August 26, 2026 through Wednesday, September 9, 2026 UTC

  View FAA NOTAM →
• SECURITY6/6998 2026-08-27 11:00Z – 2026-09-08 03:00Z SFC–400 ft

  St. Paul, MN, Thursday, August 27, 2026 through Monday, September 7, 2026 Local

  View FAA NOTAM →
• HAZARDS6/8538 2026-08-27 13:04Z – 2026-08-31 23:59Z SFC–2,000 ft

  IRON COUNTY, WI, Thursday, August 27, 2026 through Monday, August 31, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/8524 2026-08-27 14:00Z – 2026-09-10 03:30Z SFC–12,500 ft

  18NM SE ENNIS, MT, Thursday, August 27, 2026 through Thursday, September 10, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/8675 2026-08-28 01:00Z – 2026-09-10 04:00Z SFC–13,000 ft

  36NM SW BUTTE, MT, Friday, August 28, 2026 through Thursday, September 10, 2026 UTC

  View FAA NOTAM →
• HAZARDS6/8778 2026-08-28 14:00Z – 2026-09-11 03:00Z SFC–10,000 ft

  18NM S DILLON, MT, Friday, August 28, 2026 through Friday, September 11, 2026 UTC

  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.

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