The first thing we did on being called out to a snag was empty our pockets.
Definitly nothing like that up to my demob, 1965.
We didn't get 'called out' to snags either! We 'saw in' the A/C and spoke to the crew. In my case usually the Navigator. We discussed the performance of the various equipment and if anything was 'snagged' in the F700 it was entered by the Captain before he signed. An entry of 'Satisfactory' was rather rare on a Valiant! They were not the world's most reliable A/C and all of the Radio kit was pre-transister stuff, so something usually packed up.
We of course informed the Crew Chief and our trade SNCO's what was happening.