Pilots and Engineers talk to each other mostly (face to face or othrwise) every day, all over the world regarding any defects on aircraft as rhey occur.
There is so much back up redundancy in a modern aircraft and approved legislation for rendering systems inoperative for short periods in complete safety whilst awaiting repair/replacement. It is our, collective, job (pilot/engineer) to make professional adult decisions on aircraft serviceability and ability to operate.
There is no taking off with serious faults effecting flight safety, that is a golden life preserving rule.
Mybe the odd inconseqential thing gets left until the end of the day on the odd flight in the odd airline but that would be about it.
I have worked for some very rough freight companies with old dogs for aircraft where lots of trivial items were ignored (and I mean very trivial) otherwise no company would make money - prettying up flying shitboxes is not anyones priority, they are workhorses... BUT even they attend the flight safety issues by the rules (eventually...spares permitting


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