From an Engineers perspective. Always worth a call to the Tech unless you are completely happy with the defect.
From the radio I would say Go if no M action required on something like an Igniter fault. Commander is in charge at that point but only he/she can make the call, we can MEL it; but can it be MEL'd ACF'd at the other end, and you must put it in the book... tut tut some operators??.
We have to be sensible in our jobs under operational constraints/pressures but should we really be affected by these conditions......NO! I don't get paid any more penning a dodgy defect off
Plus, Surely you are better off with my autograph holding the accountability for the defect?
I have always been told, if you are unsure on anything ASK. Better to be safe than sorry, no lay-bys in the sky.
Any other cliche on a postcard!!