What was found
RIGHT PACK PRESSURE 10 PSI IN CRUISE INBD CREW REPORTED LOSS OF RT PACK PSI OCCURED ON CLIMBOUT, RT PER CREW OPERATED BOTH PACK ON GRD WITH APU BOTH PACKS OPERATED TWO ISSUES FOUND ON INITIAL EVALUATION: CONTROL PRESSURE LINE PACK WAS CYCLED OFF THAN ON, NO HELP. NORMAL, SUGGEST ENGINE BLEED MALFUNCTION. BETWEEN BLEED AIR REGULATOR AND PRECOOLER CONTROL VALVE IS BROKEN AND THE ELECTRICAL CONNECTOR BRACKET ON THE BLEED AIR REGULATOR IS BROKEN (SEE ATTACHED PICTURES). REMOVED AND REPLACE BLEED AIR REGULATOR ALSO REMOVED AND REPLACED SENSE LINE AND SUPPLY PRESURE SENSE LINE REF AMM 36-11-03. ADD EMP:U110124,U006440,U107561, ROTABLE PARTS CHANGE WAS INDICATED - TT # 1070921 SN OFF 7610 REGULATOR, BLEE OFF 29-3611-9-0005 7610 ON 29-3611-9-0005 4334