Unstable approach — TKR101

KRAP · 14

2026-07-28 20:35 UTC· 4SD4 → KRAP· CORSAIR TWO LLC· MD87

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TKR101 (Corsair TWO) was operating from 4SD4 to KRAP on 2026-07-28. SkyMeter detected a low approach-stability score at Rapid City Regional Airport (KRAP) on runway 14 at 20:35 UTC. Trace data at the event: 4271 ft AGL, 163 kt GS. Approach stability score: 36/100. 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 8 kt wind, 1 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)
  • HAZARDS6/9566 2026-07-28 17:15Z – 2026-08-11 04:00Z SFC–10,000 ft

    33NM SW PHILIP, SD, Tuesday, July 28, 2026 through Tuesday, August 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.

Pilot review data

  • Runway 14
  • 4271 ft AGL at event
  • 163 kt ground speed
  • 0 fpm vertical
  • Approach stability 36/100
  • 8 kt wind
  • 1 kt crosswind component
  • 16,093 m visibility
  • KRAP 161652Z 18021G31KT 10SM CLR 19/09 A3015 RMK AO2 PK WND 16031/1643 SLP202 T01890094

Flight context

  • TKR101
  • Corsair TWO
  • MD87
  • 4SD4 → KRAP
  • 2026-07-28 20:35 UTC
  • KRAP runway 14

All events on this flight

Unstable approach 20:35:19 UTC · KRAP runway 14 · 4,271 ft AGL · 163 kt GS
Long landing rollout 20:39:45 UTC · KRAP runway 14 · 3,149 ft AGL · 4 kt GS

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· KRAP