KAL646 was operating from WSSS to RKSI (Incheon International Airport) on 2026-04-21. SkyMeter detected a diversion to Sembawang Air Base (WSAG) on runway 05 at 23:58 UTC. Peak cruise altitude FL392, turnaround area near Wenchang, CN. Approach stability score: 88/100. Scores in this band are observed on roughly 50% of approaches at this runway and represent the centerline of normal operations. METAR at the time reported 2 kt wind, 2 kt crosswind component. Detection algorithm and known limitations: see SkyMeter methodology.
Pilot review data
- Runway 05
- 0 ft AGL at event
- 120 kt ground speed
- 0 fpm vertical
- Approach stability 88/100
- 2 kt wind
- 2 kt crosswind component
Flight context
- KAL646
- B77W
- WSSS → RKSI
- 2026-04-21 23:58 UTC
- WSAG runway 05
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