Beagle
Good try - seem to remember that those were the three cct bkrs the Nav had to pull if one got a BLC caption with flaps up. That stopped the hot bleed air for the blown flaps in the FGR2 from cooking the parts that were meant to stay cool.
Used to carry a tool when I flew in the back of a two-sticker in case they needed extracting.
Wiggy
Reckon I must have known you when you could have answered that question.