Boltar writes

I believe it was mentioned in Metro once.

Oh right. Well, we've already seen what you 'believe' to be true...

Does the station manager have all the bits tucked away in the back room?

Of course they do. A huge-big ****-off cupboard, with all the parts
required to replace every single escalator on the system. And the only
reason they don't replace it in a single week, is just to **** *you*
off.

--
Dave