Unstable approach — ASA26
KJFK · 13L2026-06-17 19:11 UTC· KSEA → KJFK· ALASKA AIRLINES INC· B739
ASA26 (Alaska Airlines) was operating from KSEA to KJFK on 2026-06-17. SkyMeter detected a low approach-stability score at John F Kennedy International Airport (KJFK) on runway 13L at 19:11 UTC. Trace data at the event: 1121 ft AGL, 160 kt GS. Approach stability score: 41/100. 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 12 kt wind, 4 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)- SECURITY5/2811 2025-10-20 12:00Z – 2026-10-20 12:00Z SFC–1,000 ft
NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local
View FAA NOTAM → - SECURITY6/4115 2026-06-01 04:00Z – 2026-07-21 03:59Z SFC–400 ft
BASKING RIDGE, NJ, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - SECURITY6/4117 2026-06-01 04:00Z – 2026-07-21 03:59Z SFC–400 ft
Warren, NJ, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - SECURITY6/4158 2026-06-01 06:00Z – 2026-07-21 05:59Z SFC–400 ft
MERIDIAN, ID, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - SECURITY6/4164 2026-06-01 06:00Z – 2026-07-21 05:59Z SFC–400 ft
Sandy, UT, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - SECURITY6/4167 2026-06-01 06:00Z – 2026-07-21 05:59Z SFC–400 ft
Salt Lake City, UT, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - SECURITY6/4034 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft
Renton, WA, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - SECURITY6/4033 2026-06-01 07:00Z – 2026-07-21 06:59Z SFC–400 ft
RENTON, WA, Monday, June 1, 2026 through Monday, July 20, 2026 Local
View FAA NOTAM → - HAZARDS6/5894 2026-06-05 20:31Z – 2026-06-19 02:00Z SFC–10,000 ft
38NM SE TWIN FALLS, ID, Friday, June 5, 2026 through Friday, June 19, 2026 UTC
View FAA NOTAM → - HAZARDS6/5936 2026-06-06 03:00Z – 2026-06-19 02:00Z SFC–7,500 ft
27NM SE TWIN FALLS, ID, Saturday, June 6, 2026 through Friday, June 19, 2026 UTC
View FAA NOTAM → - HAZARDS6/6827 2026-06-09 17:15Z – 2026-06-22 02:00Z SFC–10,000 ft
9NM SW TOOELE, UT, Tuesday, June 9, 2026 through Monday, June 22, 2026 UTC
View FAA NOTAM → - HAZARDS6/6965 2026-06-10 14:00Z – 2026-06-22 03:00Z SFC–10,000 ft
9NM SW TOOELE, UT, Wednesday, June 10, 2026 through Monday, June 22, 2026 UTC
View FAA NOTAM → - SECURITY6/6449 2026-06-11 04:01Z – 2026-06-28 03:59Z SFC–400 ft
New York, NY, Thursday, June 11, 2026 through Saturday, June 27, 2026 Local
View FAA NOTAM → - HAZARDS6/7480 2026-06-11 12:00Z – 2026-06-23 03:00Z SFC–9,500 ft
24NM SW CHADRON, NE, Thursday, June 11, 2026 through Tuesday, June 23, 2026 UTC
View FAA NOTAM → - UAS PUBLIC GATHERING6/5706 2026-06-11 14:00Z – 2026-06-23 04:00Z SFC–400 ft
Omaha, NE, Thursday, June 11, 2026 through Tuesday, June 23, 2026 UTC
View FAA NOTAM → - SECURITY6/6851 2026-06-13 04:01Z – 2026-07-12 03:59Z SFC–1,000 ft
Harrison, NJ, Saturday, June 13, 2026 through Saturday, July 11, 2026 Local
View FAA NOTAM → - HAZARDS6/8221 2026-06-14 20:07Z – 2026-06-28 03:00Z SFC–6,000 ft
22NM SE RICHLAND, WA, Sunday, June 14, 2026 through Sunday, June 28, 2026 UTC
View FAA NOTAM → - SECURITY6/7801 2026-06-15 04:00Z – 2026-07-07 03:29Z SFC–400 ft
Whippany, NJ, Monday, June 15, 2026 through Monday, July 6, 2026 Local
View FAA NOTAM → - HAZARDS6/8252 2026-06-15 04:35Z – 2026-06-26 04:00Z SFC–5,500 ft
12NM NE PASCO, WA, Monday, June 15, 2026 through Friday, June 26, 2026 UTC
View FAA NOTAM → - HAZARDS6/8253 2026-06-15 15:00Z – 2026-06-30 05:00Z SFC–6,000 ft
3NM W BENTON CITY, WA, Monday, June 15, 2026 through Tuesday, June 30, 2026 UTC
View FAA NOTAM → - HAZARDS6/8503 2026-06-15 21:15Z – 2026-06-20 04:00Z SFC–6,500 ft
20NM S YAKIMA, WA, Monday, June 15, 2026 through Saturday, June 20, 2026 UTC
View FAA NOTAM → - VIP6/8317 2026-06-15 22:15Z – 2026-06-17 18:45Z SFC–4,999 ft
NEW YORK, NY, Monday, June 15, 2026 through Wednesday, June 17, 2026 Local
View FAA NOTAM → - HAZARDS6/8752 2026-06-16 20:30Z – 2026-06-23 04:00Z SFC–6,500 ft
12NM NE PASCO, WA, Tuesday, June 16, 2026 through Tuesday, June 23, 2026 UTC
View FAA NOTAM → - HAZARDS6/8838 2026-06-17 07:00Z – 2026-06-18 14:00Z SFC–7,500 ft
34NM SE COEUR D'ALENE, ID, Wednesday, June 17, 2026 through Thursday, June 18, 2026 UTC
View FAA NOTAM → - HAZARDS6/8961 2026-06-17 15:50Z – 2026-06-24 04:00Z SFC–7,500 ft
11NM NE YAKIMA, WA, Wednesday, June 17, 2026 through Wednesday, June 24, 2026 UTC
View FAA NOTAM → - HAZARDS6/8981 2026-06-17 17:53Z – 2026-06-18 05:00Z SFC–7,000 ft
10NM SE PENDLETON, OR, Wednesday, June 17, 2026 through Thursday, June 18, 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.
Pilot review data
- Runway 13L
- 1121 ft AGL at event
- 160 kt ground speed
- 0 fpm vertical
- Approach stability 41/100
- 12 kt wind
- 4 kt crosswind component
- 16,093 m visibility
- KJFK 110251Z 09006KT 10SM SCT150 BKN250 14/11 A3046 RMK AO2 SLP314 T01440111 50001
Flight context
- ASA26
- Alaska Airlines
- B739
- KSEA → KJFK
- 2026-06-17 19:11 UTC
- KJFK runway 13L
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