In A Slightly Different Vein
Not my story, but told to me years ago...
RAF station had a power outage, while Top Top Top Brass was visiting & the UPS\Battery backup failed to kick in.
TTTB demanded a full investigation & wanted the report on his desk ASAP, from someone who wasn't stationed at the base.
That report highlighted two major things:
It was full of crumbs & other flaky pastry detritus, where it had been used to heat then keep pies & the like hot & ready to eat, along with tea & coffee spills inside, on the sides & at the rear (with mug rings on the top of the unit).
That the staff sergeant had signed off on, but not checked & topped up the batteries electrolyte levels, in fact It was almost empty and hence no charge, unlike the sergeant who promptly found himself on one & demoted to corporal.