Yesterday was a normal day, now for the problems

Buccaneers were old aircraft even when we first got them.
Designed in the early fifties, there were some things they were exceptionally good at, but some things were prone to failure. With approx 16 to fly per day, as much as three times each they exhibited their problems in a short period, a few weeks perhaps without a noticeable problem but not much longer. the best ones made it through to a primary without more than a few jobs but the worst were only lasting 1-2 trips without something mysterious happening.
As an electrical\instruments guy some of the gear was just tempremental, such as the fire relays. on a start up if they failed the routine was to get one of us to go up the accessories bay, pull off the faulty relay, clean the contacts and put it back on. fingers crossed on the restart and that got us past the first few times it packed up.
But some were more persistent in failing, the relay then needed to be changed, this meant going to another aircraft on the line, pulling one out of that one, and putting it in the first aircraft waiting to go.
This took 15 minutes tops. then restart and the aircraft went, but the one that was robbed was now "faulty", but usually meant nobody mentioning it and waiting for it to occur on that aircraft later.
Other items in that category were the anti skid generators, some of the solenoids, ones round the undercarraige were annoying, as if they didn't work the undercarriage did peculiar things such as not coming down at the right moment. to be honest the electricians were usually hanging back on the undercarraige problems because the riggers always got the first few rounds of troubleshooting before we were called in. Jackups and U\C ground tests, followed by the obligatory "no fault found" for the first few snags of this kind were usual.

The anti collision lights were mostly faulty when night flying was required; and were destined to always need attention until they introduced laser ones much later on.
Alternators were mostly ok, but the control and protection units were a bit cranky, a bit like the fire relays.
You could change one that was absolutely fine except that day, put another one in and fix the problem but have the first one checked and nothing wrong.