Source: Simon Hradecky | www.avherald.com

An Alaska Airlines Airbus A320-200, registration N621VA performing flihgt AS-1506 from Seattle,WA to Santa Ana,CA (USA), was climbing through FL270 out of Seattle when the crew stopped the climb and decided to return to Seattle reporting an unusual odour on board. The aircraft landed safely back in Seattle about 30 minutes after departure. Three cabin crew were taken to a hospital for a precautionary medical checkup. Emergency services did not detect any odours on entering the aircraft after landing.

The airline reported the cause of the odour is being investigated, the cabin crew were taken to a hospital for precautionary medical evaluation.

The flight was cancelled.