What was found
RIGHT ENGINE ANTI-ICE ADVISORY FAILURE OF EITHER LT ENGINE ANTI-ICE (EAI) VALVE TO THE CLOSED POSITION. DB 30 WWFDS EAI CIPS OPS (LEFT)CYCLE BREAKER, PERFORMED EAI SYSTEM TEST , REF FIM DMC-B787-A-30-20-F1-05A-421A-A TEST FAILED, MAINT MESSAGE 30-10022. REMOVED ENGINE ANTI-ICE PRESSURE REGULATING & SHUTOFF VALVE IAW AMM 30-21-08. REMOVED ANTI-ICE VALVE CONTROLLER. BOLT BROKE ON THE MOUNTING BRACKET OF EAI HOT AIR INTAKE DUCT. REMOVED BROKEN BOLT AND CLEANED THREADS FROM UPPER AFT MOUNTIG BRACKET. REMOVED AND REPLACED NR 2 ENGINE ANTI-ICE VALVE COMPLETED REACTIVATION PER AMM DMC-B787-A-30-21-08-00B-720A-A THROUGH STEP D.