What was found
DURING DEPARTURE ROLL, ALTERNATE LAW ON LANDING AOA FAULT CA, FO, STBY, DIVERTED AND LANDED. RETRIEVED PFR PH04 ADIRU 1 FAULT, F/CTL ALTN LAW. APPLIED TSM 34-13-00-810-804-AADR1, FAILURE. RESET ADR1 FAULT CLEARED EFCS GROUND SCAN AFTER RESET CLEAR NO FAULTS AOA FAULT DUE TO ADIR1 FAIL. SWAPPED ADIR 1 AND 3 IAW AMM 34-12-34-00-001/400-001. AOA TESTED OK AFTER SWAP IAW AMM 30-31-00-710-001.