We had an aircraft come back off a SAR job the other night at 2230,the pilot gave me a list of the usual waste of time niff naff snags as they do,when the co-pilot handed me a knob from a rotary lighting dimmer switch and a glib comment that the grub screw was missing. They seemed very pleased when I said that if we could not find it we would be "off state" all night until we could get clearance for flight from the SENGO in the morning. This produced comments of "Oh good we can go to the Boss's christmas drinks then". So we commenced what we expected to be a fruitless all night search,when I had what I can only describe as a flash of inspiration. I went back into ops and asked both front enders to check the soles of their flying boots (yes I know they are supposed to be anti FOD) low and behold it was stuck in the tread on the co-pilots boot! I nearly choked on my cup of tea. The best bit was their faces when I said that we were back on state, and we could now do with an all night job for them! How the hell it stayed there and did not fall out on the way in from the pan I will never know.DT_Xtremez_28: