The incident occurred in Offaly last month.
Three carriages servicing a number of rail routes remain out of use since the 3rd of September, after a tractor collided with a train in the midlands.
The incident happened at a level crossing in Offaly and there were no serious injuries.
However Irish Rail has confirmed damaged carriages haven't returned to service, or been replaced.
Fianna Fail TD Cathal Crowe, told Irish Rail's Barry Kenny commuters are being impacted:
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