16 November 2017 Canadian North - Flight Number: 5T 446 Boeing 737-200 Reg: C-GOPW Kugluktuk, NU to Cambridge Bay, NU (Canada) Popping sounds, Odour in cabin followed by smoke. The aircraft returned to Kugluktuk. 28 November 2017 Austrian Airlines - Flight No: OS 474 De Havilland Dash 8-400 Reg: OE-LGK Basel/Mulhouse (Switzerland/France) to Vienna. Burning odour in cabin. The aircraft returned to Basel/Mulhouse. Full details of all fume events can be seen at www.aviationherald.com