What was found
DURING CLIMB OUT, LT BLEED DUCT PRESSURE LOW, 14 PSI. RT BLEED PRESS 34 PSI. AFTER LEVEL OFF BLEED PRESSURE RETURNED TO NORMAL. LT & RT PRESSURE 32 PSI. SECURITY AND CONDITION CHECK OF LINES FROM PRV TO PRV CONTROLLER GOOD ON NR1 ENGINE, REMOVED NR1 ENG PRV IAW AMM 366-11-004-001-002. INSTALLED PRV NR1 ENG IAW AMM 36-11-18-404-017-002 UP TO STEP 3 E.(2). ACCOMPLISHED STEPS 3.E.2 & 3. COMPLETED INSTALLATION OF PRV. TEST OK, PRESS GOOD, NO DEFECTS.