What was found
STS MESSAGE ENG ANTI ICE PRSOV RT, DEFERRED RT ENG A/I PRSOV PER MEL 3021BF. MAINTENANCE PROCEDURE C/W, CONTROLLER AND VALVE, IAW MBF MAINT MSG 30-10022 AND FIM 30-20-F1-05A-421A, ALONG WITH WIRE CHECKS SHOWS. REMOVED NR 2 ENG ANTI-ICE PRESSURE REGULATING & SHUTOFF VALVE IAW DMC-B787-A-30-21-08-00B-520A-A, INSTALLED A NEW ANTI-ICE PRSOV RT ENGINE UP TO AND INCLUDING STEP 1. C. (3) (A) REF AMM DMC-B787-A-30-21-08-00B-720A-A. CONTINUE AT STEP 1. C. (4).ENGINE 2 ANTI-ICE SYSTEM TEST PASSED REF AMM DMC-B787-A-30-21-00-20E-300B-A. NO FAULTS NOTED.