According to the ATSB, the runway had been temporarily shortened at the time of each incident for overlay works.

“During the respective night take-offs from runway 34, each aircraft reportedly rotated past the temporary displaced threshold resulting in jet blast affecting people and objects in the work area,” the ATSB said.

“There were no reported physical injuries. There was no damage reported from the 9M-MTL occurrence, and several unserviceability lights were damaged by the jet blast of VN-A819.

“In response, Melbourne Airport stopped any works that require a displaced threshold on runway 16/34 pending further investigation.”

The ATSB will release a final report at the conclusion of its investigation, and will immediately notify relevant parties if it discovers a critical safety issue in the process.

“The evidence collection phase of the investigation will involve retrieving and reviewing recorded data, interviewing involved parties, and the collection of other relevant information,” it said.