What was found
DURING CLIMB LEFT DUCT PRESS 0 RIGHT DUCT 42 PSI. PERFORMED BLEED EALTH CHECK REF AMM 36-11-00-700-801. FOUND FAULTY BLEED AIR REGULATOR, PRSOV AND HIGH STAGE REGULATOR. REMOVED AND REPLACED SAME FEF AMM 36-11-03, 36-11-04 AND 36-11-07. OPS CHECK NORMAL. ROTABLE PARTS CHANGE WAS INDICATED - TT 1382376, S/N OFF 07159 TT 1371122, S/N OFF 05892 TT 1329106, S/N OFF 02977 VALVE, BLEED, H OFF 29-3611-9-0002 7159, ON 29-3611-9-0002 0666 REGULATOR, BLEED OFF 29-3611-9-0005 5892, ON 29-3611-9-0005 4038 REGULATOR, HI S OFF 29-3611-9-0001 2977 ON 29-3611-9-0006 8021.