What was found
FLT # 1044 PBI-PBI. CABIN PRESS CAUTION/WARNING CABIN CLIMBED TO 9800FT @ FLT270.;PERFORMED TSM TASK 21-31-00-810-809. PERFORMED GVI OF A/C NO DEFECTS NOTED. CHECKED CONDITION OF A/C DOOR SEALS, NO DEFECTS NOTED. PRESSURIZED A/C AND FOUND AFT CARGO DOOR LEAKING. REPOSITIONED SEAL BACK INTO RETAINER AS REQ, NO OTHER LEAKS NOTED. BITE CHK/FUNC CHK OF BOTH CPC GOOD. AS PRECAUTION REPLACED BOTH CPC & OUTFLOW VALVES. WORK PERFORMED W/REF TO AMM 21-31-51 & 21-31-34. A/C OK SVC."