What was found
FUMES IN AFT CABIN AREA REPORTED BY FLT ATTND AFTER SMELLED "DIRTY SOCK ODOR" STOPPED AFTER ISOLATED #2 PACK-PERFORMED TSM # 05-50-00-810-931, PACK ISOLATION AD BURN OUT 1+2, NO SMELLS NOTED WITH ENGINES RUNNING AND APU BLEED. ALL CHECKS NORMAL AT THIS TIME. A/C OK FOR SERVICE. IAW 71-00-00. AMM.