HI Geoff - you got me there sir. I should have said the reason I mentioned it was because Mike quite rightly included replacement parts in the conversation.
Nothing wrong in fitting or repairing by experienced engineers or inexperienced engineers if they know to admit their limits. Nothing wrong with sending a board basher. A lot of boards cannot be repaired locally so it's right to just change them because IEC standards are in place to ensure quality control. How does a local engineer know the heat calculations for the soldering on a detailed board? if it looks big enough to repair then fine but anything with a large-scale processor etc on it is for the factory only.
I was once inexperienced and employed by a big player - so again you can't focus on individuals. If the company is good then they will have the system in place to escalate to more experienced staff or the on site engineer handles it well.
Part of the maintenence ethos I teach students is to understand that some devices cannot be serviced by the hospital and some can. It seems to be a new skill to be able to determine this in itself....I don't know enough about US to comment but hopefully the candour of this thread helps.
Finally, you all may be interested to note the new UK bodies have been announced.https://www.gov.uk/government/publi...s/uk-approved-bodies-for-medical-devices