THREE fire crews attended an incident in Diggle on Wednesday, May 15 involving a Hull to Manchester TransPennine Express service.
The three-carriage service came to a halt near the tunnel after the alarm system was activated by smoke.
Firefighters explained an engine turbo blew causing oil to spill on to the hot exhaust which created smoke and set off the alarm.
The engine driver isolated the engine before fire crews from Mossley, Oldham and Chadderton attended and checked the train, including using thermal image cameras.
Once the checks had been completed the service resumed after a 45-minute delay to Manchester using engines on the first and third carriages.
Fire service added nobody was injured.
A spokesperson for TransPennine Express said: “One of our Hull to Manchester services had to be taken out of service yesterday because of a mechanical fault on board.
“Unfortunately, this meant we had to cancel some services on this route at short notice and we apologise to any customers who were inconvenienced by this. The train involved has now been fully repaired and is back in service.”