What was found
DURING CLIMB TROUGH 10,000 FT, LT DUCT PRESSURE 40 PSI, RT DUCT PRESSURE 18 PSI. ONCE ESTABLISHED IN CRUISE AT FL 350, LT DUCT 36 PSI. ACFT GROUNDED. PERFORMED NR 2 ENGINE BLEED AIR SYSTEM HEALTH CHECK IAW AMM 36-11-00-700-801 STEP 5 G (1). PRSOV VALVE FOR SMOOTH OPERATION WRENCH CHECK FOUND NORMAL. PERFORMED GVI ON BLEED AIR REGULATOR AND BLEED AIR SUPPLY LINES FOR CONDITION, NO DEFECT NOTED.