As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS DURING DESCENT, ONE TIME FOR ABOUT A SECOND, BOTH CAPT AND FO PFD AIRSPEED AND ALTITUDE FLUCTUATED WILDLY THEN RETURNED TO NORMAL. STATUS MSG THEN SHOWED CAT I ONLY. MAINTENANCE POST FLT REVIEW FOUND ADIRU1 INTERMITTENT FAULT. ACCOMPLISHED SYSTEM TEST OF ADIRU1 IAW AMM 34-13-00. ACCOMPLISHED OPERATIONAL TEST OF LAND CAT III SYSTEM IAW AMM 22-97-00. ALL TESTS PASSED.