What happened
After landing and while taxiing toward the gate, the flight crew was notified by the flight attendant that smoke had entered the cabin. Upon receiving further details indicating the cabin was filled with smoke, the captain stopped the aircraft and engaged the parking brake. An immediate evacuation of all passengers and crew members was ordered and completed.
The flight attendant described the smoke as blue in color with an odor similar to burning oil.
The investigation
An examination of the aircraft revealed that a fan by-pass check valve within the right air conditioning pack had failed. This mechanical failure caused the air conditioning pack to overheat, resulting in the production of the smoke observed in the cabin.