Queensland Transport Minister Scott Emerson says Fair Work Australia has debunked union claims that a passenger train crash was caused by brake failure.
Queensland Rail and police are investigating how a Brisbane train left the tracks and smashed into a toilet block at Cleveland station on Thursday.
The Rail Tram and Bus Union (RTBU) said its members would not drive the model of train involved over safety concerns, but was ordered to cease the ban by Fair Work Australia.
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Mr Emerson said Fair Work Australia had informed him there was no evidence to support brake failure being an issue.
He said the RTBU should allow the Australian Transport Safety Bureau to complete investigations.
"Fair Work Australia has ordered the union to cease their bans to allow the investigation into the cause of the Cleveland incident to take place," Mr Emerson said in a statement.
"I welcome the decision by Fair Work Australia, and I urge the union to let Australian Transport Safety Bureau (ATSB) get on with their investigation."
Mr Emerson said the train underwent a full inspection on January 9 and it was the first train to travel on that line that day.
The RTBU has been sought for comment.
