More engine woes for Qantas

Qantas has been plagued with more engine problems, with one of its planes carrying 234 passengers to Melbourne forced to turn back to Perth.

The flight crew noticed the problem between five to 10 minutes after QF768 took off from Perth at 2.50pm on Friday.

"Soon after take-off, the flight crew detected some vibration in the left-hand engine of the Boeing 767 aircraft," Qantas spokesman Simon Rushton told AAP.

The crew did some in-flight checks and decided to turn back.

The plane, which has GE engines, landed about 3.15pm.

About 50 passengers onboard had been placed on other Qantas flights to Melbourne by 7.45pm, with the remainder expected to board flights shortly, Mr Rushton said.

"They will all fly tonight," he said.

He denied the incident involving a mid-air explosion of a Qantas A380 Rolls Royce engine over Indonesia last week may have influenced the crew's decision to return to Perth.

"Not at all. Our flight crews are absolutely trained to respond in a very conservative way to any in-flight issues and that's exactly what they did in this case," Mr Ruston said.

"They responded quickly, appropriately and in line with their training."

No one was hurt in the incident.

Qantas and Singapore Airlines have grounded their A380 planes while the mid-air blast over Indonesia is investigated.

- AAP