What was found
LOSS OF CABIN ALTIITUDE CONTROL, CABIN CLIMBING ERRATICALLY. EMERGENCY DESCENT AND DIVERSION. BLEED LOSS WING R EICAS ADVISORY BLEED AIR SUPPLY VALVES ARE LATCHED CLOSED OR THE RESPECTIVE SWI TCHES ARE OFF, SO THAT BLEED AIR IS NOT SUPPLIED TO THE RT WAI, RT PACK, AND RT HYDRAULIC RESERVOIR PRESSURIZATION. FOUND PLENUM DUCT SEALS FAILED ON BOTH LEFT AND RIGHT PACKS. REP LACED AND OPS CHECKED GOOD. MESSAGES CLEARED.