You're not living in the real world. It's all very well for ground engineers to insist that any defect is repaired and signed off by a licensed aircraft engineer, but in the real world sometimes light bulbs need changing, things need a little tap with a torch, and weight switches need a bit of persuasion to operate correctly, and hey, if they then do function correctly, who's to stop the operation. The real world doesn't allow ground engineers everywhere, there are no hotel rooms to spare in Menorca, and this guy sorted the problem. So if you feel like casting the first stone step forward and see how far it gets you, but a clever and resourceful pilot got the aeroplane home, legally as far as I can see, so why don't we give him a bit of grudging respect?