PASSENGER safety on Enterprise trains was not put at risk by doors opening mid-journey on two occasions, the chief executive of Translink has said.
Chris Conway appeared before the assembly's regional development committee yesterday.
In one instance this month, a door partially opened as staff made arrangements to load a catering trolley in Newry. No passengers were nearby.
In another case last month, a train official heard air coming through the door and it was later discovered that a bolt was faulty.
Mr Conway said: "Passenger safety was never put at risk."
Translink carried out a technical investigation following the incidents, which prompted a ban on the four new trains by the Republic's rail safety regulator, the Railway Safety Commission (RSC), as revealed in The Irish News.
The refurbished Enterprise train was brought back in service a fortnight ago, after it emerged that the train was still technically permitted to operate in the north during a period when it was banned in the Republic.
An RSC spokeswoman said that after a "review of evidence" it was "satisfied that the circumstances which gave rise to the prohibition notice have been remedied".
The four new trains, upgraded at a cost of £12 million, had been due to be in service by the end of 2015.
