What was found
RIGHT ENG BLEED OFF AND RT PACK OFF LIGHTS CAME ON DURING T/O ROLL AND STAYED ON THRU CLIMB AND L-O, THEN BLEED SHUTS OFF. DID BITE CHECK ON AIR SUPPLY BITE MODULE. HITS PRV AND WIRING. SWAPPED LT AND RT AIR SUPPLY CONTROL CARDS-NO HELP, RETURNED CARDS TO ORIGINAL POS. REPLACED RT ENG PRV-NO HELP. REMOVED NEWLY INSTALLED PRSOV FROM NR 2 ENG REMOVED PRSOV FROM NR 1 ENG AND INSTALLED IN NR 2 ENG. NEEDS RUN ACCMP 1 AND 2 ENG FOR PRSOV CHANGES. RAN AT HIGH POWER BOTH ENGS, BLEED PRESSURES NORMAL.