What was found
RIGHT ENGINE BLEED OFF LIGHT ASSOCIATED AC RETURNED TO GATE AND MAINTENANCE REMOVED AC FROM SERVICE DEFERRED FOR DEPARTURE MEL 36-11-1-2A-1 AND RELEASED. WORKED NEXT BASE CONDUCTED T/S PER FIM 26-10 F.T 837. DURING BIT, PRV AND PRVC FAULT IN HISTORY. FOUND R ENGINE PRV SUPPLY HOSE LOOSE AT UNION. UNION B-NUT SEIZED. REPLACED BOTH PER AMM 36-11-18. OPS TEST REQUIRED. DI REMAINS. A/C VERIFIED ETOPS 120. REACTIVATION OF FAMV C/W, REACTIVATION OF PRSOV C/W PER MEL 26-11-1-2A-1 CONDUCTED CHECK OF R PNEUMATIC SYSTEM AND RH T.R UTILIZING ENGINE RUNS PER AMM 36-11-00, AND 78-31-00. OPS CHECK OK. THIS CLEARS DI 47702. PLACARD REMOVED. REACTIVATION PER MEL 36-11-1-2A-1 C/W. A/C VERIFIED ETOPS 180. PLACARD ROTATED.