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R9 Comparator error
In a dual ADAHRs please put both the R9 in PFD mode and ADAHRS select to auto. - find the difference between the two. - If you find a difference in air data - perform the ADU Cal - if the Attitude has the difference - perform the IRU Cal - if the Heading is off - perform the Mag Cal - if you do the IRU Cal you…
