Serious lack of redundancy in a life-safety critical-system. It should have: - 5+ AOA sensors of different types - discard any sensor values that are stuck or

Serious lack of redundancy in a life-safety critical-system. It should have: - 5+ AOA sensors of different types - discard any sensor values that are stuck or providing incorrect readings - have a spray, heating system (some do) and camera system for automatically deicing and verifying AOA sensors in-flight Without a camera system to verify sensors, crews won't have a definitive way to know if they're getting true or false information from clogged pitot, stuck AOA or malfunction.