The Sydney airport official said that the MU736 took off from Sydney at 10.30 pm, on Sunday night, but had to return an hour later, after the damage was detected and fuel dumped, reports Efe news.
Firefighters were waiting at the airport to assist in the emergency landing, but the plane touched down without incident.
No injuries have been reported.
"The crew observed the abnormal situation of the left engine and decided to return to Sydney airport immediately," the general manager of China Eastern Airlines Oceania region Kathy Zhang told the Australian Broadcasting Corporation.
The incident is now under investigation.