While more or less all agree that a lapse in basic airmanship allowed the unnoticed left RA problem to trigger a series of issues, it does seem that it would be a good idea - and easy to achieve - to incorporate a system to flag up and announce a mismatch between the two RAs. It went unanswered, very early in this thread, that the left RA could only flag a failure but not an error while the right RA was sitting there waiting to have its measurement compared. Being electronic instruments, rather than pressure-operated, should make a comparison system relatively easy and cheap - both as original equipment but also, now, as a modification.
Last edited by Cameronian; 11th April 2009 at 18:50.