AirAsia 'fully cooperating' with flight investigation

AirAsia says it is "fully cooperating" with an investigation into engine failure on a flight that was forced to turn back to Perth.

Flight D7237 departed for Kuala Lumpur on Sunday morning with 359 people on board and was about 90 minutes into the flight when the problem was detected.

The Australian Transport Safety Bureau said the flight crew detected "moderate airframe vibrations" and the number one engine failed.

The ATSB report will take several months.

AirAsia is also conducting an investigation with engine manufacturer Rolls-Royce, and is co-operating with the ATSB.

"AirAsia Group has always strictly followed the maintenance program prescribed by our manufacturers," the company said.

"In Australia, AirAsia Group has regularly passed safety and security audits conducted by the local aviation authorities."

Passenger Sophie Nicolas said she knew the situation was "really bad" judging by the cabin crew's reaction.

"He (the flight captain) said ‘I hope you all say a prayer, I will be saying a prayer too and let's hope we all get back home safely'," she told reporters.

Video captured by a passenger shows the plane loudly vibrating and shaking.