Norwegian to English Tech/Engineering Transport / Transportation / Shipping type of lift/elevator

This is in a specification about railway maintenance, and does not have much context:

Prosedyrer for uttak av vognmateriell / UKS

Skifteassistanse/UKS

Does anyone have any idea what UKS may stand for? I found another reference elsewhere on the Internet, which may or may not refer to the same thing, but I still can't fathom it:

Påvise viktige sjekkpunkter ved visitasjon trekkraftkjøretøy for å avdekke feil og mangler. (UKS / IKS)