Service engineers have a reputation for being kleptomaniacs – I should know, I used to be one. They can be hoarders when it comes to parts. I get it. They’re just trying to do their job with minimum fuss or delays.
More often than not, when faced with a spare part problem, service engineers will typically order more than they need and keep a few spares in the van, just in case. You never know – future jobs may have the same issue.
The theory is that this approach will save them time. Well yes, if that part is actually needed on a regular basis, in which case it should be reported back as there is clearly a consistent fault somewhere. But what if it isn’t needed? And how long do you keep it?