A Qantas flight to Melbourne was forced to turn back to Perth on Friday, in the latest mid-air incident involving the airline.
The crew detected a vibration in the left-hand engine of the Boeing 767 and after performing in-flight checks decided to return to Perth airport, where the plane landed safely.
Some of the 234 passengers on board managed to board another flight to Melbourne, and Qantas said it hoped the remainder could be rebooked on other flights, the ABC reports.
The Boeing plane had GE engines.
The incident comes after a mid-air explosion of a Qantas A380 engine, made by Rolls-Royce, over Indonesia last week.
Qantas and Singapore Airlines have grounded their A380 planes while the explosion is investigated.