What was found
S/O REPERTED HEARING A SLIGHT POP PASSING 2000FT AFTER RIGHT PACK WAS TURNED ON.NORMAL INDICATION RIGHT PACK MATCHED LEFT PACK TEMP BUT AIR MIX VALVE STAYED COLD ON RIGHT PACK.CABIN STARTED A HIGHER THAN NORMAL CLIMB 71500 FT/MIN IN MAN PRESSURIZATION WITH OUTFLOW CLOSED CABIN STILL CLIMBED AT 1500 FT/MIN TRIED TO PRESSURIZE ACFT FOUND NR 2 PACK IS NOT PUTTING OUT ANY AIR OPENED SEVERAL NR 2 PACK ACCESS PANELS VERIFIED INOP RT FWD PACK VALVE. R & R SAME IAW 727-20 0 AMM 21-55-071-4. OPS CHECK NORMAL PERFORMED EXCESSIVE CABIN PRESSURE LEAK TEST IAW 727 -200 JRH. WITHIN LIMITS. OK TO CONTINUE. CHANGED LT FLOW CONTROL VALVE PRECAUTIONARY IAW 727-200AMM 36-12-061-4. OPS CHECK NORMAL. OK TO CONTINUE