Three coupled new "Mouette" (seagull) Flirts RABe 523 # 508, # 503 and # 506 of the SBB in multiple control are running the "Flugzug" IR 2076 from Zürich Airport via Zürich main station-Baden-Brugg-Frick to Basel, on the Bözberg line near Zeihen, between Effingen and Hornussen. This new trains from StadlerRail are in service since the day before.