Beginning on 29 September 1910 her boiler tubes were renewed at Cherbourg.
Completion of the restoration was achieved in early 2004 after a government grant for new boiler tubes.
A steel pipe or "boiler tube" pilot replaced the original wooden type of cowcatcher.
No. 15's last run was on August 12, 1973, when a boiler tube blew out, scalding the locomotive engineer.
From here the hot gases travelled up through the boiler tubes which pass through the water jacket.
In less than a month she suffered twelve failures of boiler tubes and heat exchangers.
The next difficulty is that of scale deposition and corrosion in the boiler tubes.
The locomotive will need new boiler tubes and a new firebox.
Goeben had 4,460 boiler tubes replaced, among other repairs.
This caused air to be fed into the horizontal boiler tube probably caused the priming.
