I'm now going to get controversial and state another reason why electrical repair schemes may need prior approval and that's because these repairs are now supposed to be done by an A&C engineer!
I started life as an aircraft electrician but carried on along the B2 route. When I converted my licence to EASA B2, they also gave me a restricted B1 to allow me to carry on being an electrician! Learning about the minefield that is cables and connectors and picking up the required skill to use precision termination tooling (PTT) is not something you can do by subscribing to club66dotcom and sitting a multi-choice exam!
I was a rigger, then an A Lic' eng' then A&C and then now Full B1 but believe it or not - using a hook up chart or a multi meter is not rocket science
