Source: Simon Hradecky | www.avherald.com

An Air Canada Rouge Airbus A319-100, registration C-FYJG performing flight RV-1848 from Toronto,ON (Canada) to Los Cabos (Mexico) with 133 passengers and 5 crew, was climbing out of Toronto when the flight crew noticed a light odour on the flight deck, cabin crew reported a stronger odour in the cabin. The flight crew levelled off at 10,000 feet, declared PAN reporting fumes in the cockpit and returned to Toronto. The aircraft landed overweight on runway 05 about 40 minutes after departure.

A replacement A319-100 registration C-FYJP reached Los Cabos with a delay of about 4 hours.

The Canadian TSB reported maintenance found out the odour occurred with the right hand air conditioning pack and found the associated condensers to be contaminated with oil. The right hand air conditioning pack was deferred inoperativ under minimum equipment list requirements.