What was found
RIGHT IRS FAULT EICAS PER FLT CREW DEBRIEF, HAD ATTITUDE DISAGREE EICAS, PITCH/ROLL DISPLAYED ON BOTH PFDS. F/OS SIDE PFD INDICATED A DESCENT WHILE THE A/C WAS CLIMBING. F/O SWITCHED TO LEFT SOURCE, AND PFD CORRECTED. ALSO GOT RT IRS EICAS. REMOVED AND REPLACED RIGHT IRU PER MM 34-21-01. OPS CHECK GOOD. PERFORMED TEST 30 PER MM 22-00-02. TEST PASSED. A/C REMAINED FULL CAT CAPABILITY.