The ATSB is investigating an engine surge and high vibrations, involving an Airbus A330, VH-EBR, near Gold Coast, Queensland, on 14 April 2018.
During the climb, the crew detected abnormal engine indications and airframe vibrations from the left engine, and elected to reduce the thrust to idle. The crew carried out an air return to Brisbane for an uneventful landing.
As part of the investigation, the ATSB will obtain information from the flight crew, engineering reports and recorded data and gather additional information as required.
A final report will be released at the end of the investigation.
Should a critical safety issue be identified during the course of the investigation, the ATSB will immediately notify those affected and seek safety action to address the issue.