Originally Posted by
PEI_3721
OldnGrounded,
Certification approval is a mixture of theory, design, engineering, documentation, proof of concept, assessment, and testing. It does not depend on being inservice for some time.
Of course. I was responding to an assertion that theory and long service had "confirmed" satisfactory operation excep in the case of AoA failure. That, rather obviously, is not accurate.
Normal stability throughout the flight envelope had to be demonstrated in certification. No abnormalities were identified (excluding the MCAS flight envelope). Indeed the Max ‘had to be the same’ as previous series.
Yes, and concern about possible, not-previously-identified issues are rather widespread, which is what I said.
Anyway, I think you may be responding to an interpretation of what I wrote rather than to the plain language. I'll take a close look and stand corrected if I "spoke" in error.