I think your making that up to be honest with you, as I said yesterday it's only in extreme circumstances managers will tell techs not to fix something before they get there to examine it and for it to be that serious there's more chance of equipment being signed out of use than a simple repair...
For managers to tell the techs not to fix something until they had attended it would have to be something of a very serious nature, in all my years on the railway that was something that was very rarely heard of apart from in severe circumstances.
I guess by using the word incompetence you have the full details of what failed, why it failed, the response time and how long it took to fix to be able to pass such a judgment?