Just recalled another little funny...
Canberra 240 gal tip tanks were attached by 3 explosive bolts and removing them was simply a case of ensuring that the tanks were empty
and then employing 4 'volunteers' to lift an ally cradle under the tank to support it whilst the 3 nuts attaching it to the wingtip were removed...what could possibly go wrong LOL???
Anyway cpl Stu was tasked with tip tank removal one sunny day and one of the 'volunteers' was our ENGO (engineer officer/ground crew flight commander) - the first nut was a little stiffer than usual - obvious question from us experienced ground crew ''is it definitely empty Stu ??'' ,''yes of course '' replies Stu.
Next nut is also fairly tight - again ''are you absolutely sure its empty ??'' , ''yes yes'' replies Stu...anyway and predictably the last nut is
REALLY tight and we say ''dip the tank fer gods sake''.
He unscrews the filler cap and the tank is so full that fuel slops out LOL
''I'll see you in my office later corporal '' says the ENGO
and stalks off LOL
The moral of the story is that one should not rely on tapping a tank to check its contents but to use the high tech broomstick instead