Eurocopter EC135 N955AL accident near Whittier, Washington, September 23, 2025

Eurocopter EC135, registration N955AL, was involved in an accident near Whittier, Washington on September 23, 2025. The NTSB lists the highest injury level as minor, with 4 people on board. Case WPR25LA290 is in work.

ADS-B receivers recorded 46 minutes of the flight after departing the Seattle/Boeing Fld area (KBFI), reaching a maximum of 6,600 ft. The last recorded position was at 05:48 UTC, at 5,200 ft and 136 knots, descending at 1,216 feet per minute, about 6 km from Stampede Pass (KSMP).

The nearest weather report, from KSMP (6 km away), showed calm wind, visibility 6 miles or more, no ceiling reported (VFR conditions).

This page reconstructs the flight from public ADS-B data for information only. The NTSB report is the authority on what happened and why.

Key facts

Date

September 23, 2025

Location

Whittier, Washington

Aircraft

Eurocopter EC135

Registration

N955AL

Injuries

Minor (4 on board)

NTSB case

WPR25LA290 (In work)

Departure area

Seattle/Boeing Fld (KBFI)

Nearest airport

Stampede Pass (KSMP)

Recorded flight

46 min, max 6,600 ft

Last recorded position

05:48 UTC, 5,200 ft, 136 kt

3D flight replay

Replay the recorded flight in 3D with the weather, light and terrain at the time, flight instruments reconstructed from the aircraft's ADS-B transmissions, and automatically detected events.

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Sources: NTSB case WPR25LA290; ADS-B flight data from adsb.lol (ODbL); weather from NOAA / Iowa Environmental Mesonet and Open-Meteo.