You've got it in one!
A few reports from aircrew to engineers:
<Removed all the reasons to save a bit of forum space!>
From my railway environment, there is one I laughed at when I heard it:
Repair book: Knocking noise when running over 70 mph plus
Depot staff: Tested on depot, no fault found.
Lol, well of course not! You're not going to get to over 70 mph on a depot!
Not only the railway industry confined to a little sarcasm in the repair books/reports then, lol