Concerning dancing plane - the plane was stored for almost ten years. My experiences allow me to imagine a scenario that from time to time somebody went to "borrow" spare parts from the plane. They could return it to the cannibalised machine after original part came. It is very dangerous moment, non standard operation, without checks.
The colour code surely has its logic for electric engineers.
Last edited by Karel_x; 29th Jan 2017 at 10:30.