Bendalot.
Are you really saying there has never been an A of A transmitter failure on the B737 until these 2?
I saw one in Kalgoorlie about 6 years ago after it had an argument with an eagle and I'm sure that kind of damage is not unheard of all the time?
Certainly as an instrument licensed ground engineer I was involved in many pitot head changes and cleaning out for the same reason.
Anyone who designs a system which relies on a sole A of A transmitter must know the history of equipment mounted in that position?
Wunwing