As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO LOSS OF MULTIPLE NAVIGATION FUNCTIONS. ADIRU 3 WAS REMOVED AND TESTED. ADIRU 1 WAS MOVED TO NR 3 POSITION AND A REPLACEMENT UNIT INSTALLED IN POSITION NR 1. NR 1 IDG WIRING WAS CHECKED AS POSSIBLE CAUSE WITH NO FAULTS FOUND. ADIRU SYSTEM OPERATION HAS BEEN NORMAL TO DATE. TEST OF ADIRU NR 3 FOUND NO CURRENT FAULTS. A BITE MEMORY DUMP WAS ACCOMPLISHED AND SHOWED ALIGN IN AIR MESSAGE. UNIT SERVICEABLE.