A former judge has been tasked to lead an independent inquiry into the procurement of Queensland's next-generation trains and their failure to meet Australian disability access requirements.
An inquiry led by retired District Court judge Michael Forde into the $4.4 billion flawed commuter fleet will begin in August, Premier Annastacia Palaszczuk announced on Monday.
Mr Forde is expected to make recommendations to the state Labor government by the end of the year.
"(His) full terms of reference will be released once approved by Executive Council," Ms Palaszczuk said.
The trains are not fitted with disabled toilets and have limited access for wheelchairs.
But the state government is running them despite being refused an exemption from the Australian Human Rights Commission to do so while they are slowly fixed.
Acquiring the trains began under Anna Bligh's Labor government when Ms Palaszczuk was transport minister.
A contract was later signed off by Campbell Newman's LNP government, with the first of the Indian-made trains arriving after Labor returned to power in 2015.
Delays to their delivery and ongoing problems has drawn criticism from both sides of politics.
Almost 60 passengers became trapped underground last month when a fault caused by one of trains damaged power lines, leading to widespread delays.
The incident resulted in another train on the Brisbane airport line breaking down in a tunnel for over an hour, with passengers being evacuated via an emergency exit and one person needing medical treatment for anxiety.
Canadian company Bombardier is undertaking work to fix the trains at the railyards in Maryborough, northwest of Brisbane.
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