Qantas plane in emergency landing after smoke detected in cockpit

The captain requested a priority landing of the Boeing 737, en route to Perth from Sydney, when the smoke was detected.

The QF643 flight circled back and landed normally in Sydney. It taxied back to the gate where it was met by emergency services.

Smoke was reportedly restricted to the cockpit and did not enter the cabin.

No injuries to passengers has been reported but Qantas acknowledged the stress it would have caused.

"Our pilots are highly trained to handle situations like this and the aircraft landed safely after the appropriate procedures were conducted," a Qantas spokesperson said.

"We understand this would have been an unsettling experience for customers and apologise for the inconvenience.

"Our engineers will be checking the aircraft today and we will be conducting an investigation into what caused the issue."

The pilot made a PAN (possible assistance needed) call but a mayday was not declared.

An additional flight was provided for customers and was scheduled to depart Sydney at 11:30am on Monday, March 3.