Pitot tubes fault tolerance
Working with fail safe systems in another business there is one thing I do not understand that maybe someone can answer;
The pitot tubes are obviously important enough to put 3 of them on the a/c to make sure that you have backups. But, why would you use 3 of the same brand/type/design? When the a/c is built, I even bet they come off the same production batch. If there is a design flaw or malfunction, you have a much higher risk to face problems with more than one if they all are the same. It is a bit like putting two new halogen lamps in your car, with today's automated production they will probably fail at about the same time. If there is a problem with icing in the pitot tubes, they will probably experience the problem at about the same time if they are built equal.
So, why not use at least two designs/brands ?