As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEADING FAIL ON CAPT SIDE ADIRU 1 REPORTED HEADING FAULT, TCAS REPORTED HEADING FAULT, DEU REPORTED SEVERAL ADIRU 1 FAULTS. DUE TO MULTIPLE FAILURES LINKED TO ADIRU 1 REMOVED AND REPLACED ADIRU 1. REF AMM 34-21-01. ADIRU OPS CHECK GOOD. TCAS OPS CHECK GOOD. REF AMM 34-45-02-700-801-C2. PERFORMED LAND VERIFY TEST REF AMM 22-11-00, CAT STATUS RESTORED TO FULL CAPABILITY.