THE official file on the mysterious disappearance of a plane off the Victorian coast has all but ruled out pilot Frederick Valentich staged an elaborate hoax.

It has also revealed that government officials requested an investigation into Mr Valentich’s claimed UFO sighting, which he was detailing before the 20-year-old virtually vanished.

A widespread search which scoured the coastline from Torquay to Warrnambool was called off without any sightings of aircraft wreckage or Mr Valentich.

The file said by the Government to have been lost or destroyed has been uncovered and reveals that parts of aircraft wreckage with partial serial numbers were found five years after the plane and pilot vanished in 1978.

In the ensuing decades, only a brief summary of the investigation and a transcript of the air-traffic control conversation had been released.

That revealed Mr Valentich’s last words were “It is hovering and it’s not an aircraft” before his plane disappeared over Bass Strait on October 21, 1978.

The young pilot reported seeing a UFO before his plane virtually vanished off the Victorian Coast.

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