What was found
ROTTEN EGG, DIRTY SOCK ODOR REPORTED IN CABIN, AIR CONDITIONER R2 DOOR, LESSER EXTENT IN 1ST CLASS AND COCKPIT AREAS. THEN AFTER LANDING A FUEL/OIL ODOR WAS DETECTED. FOUND SOURCE OF CABIN ODOR TO BE APU. ACCOMPLISHED 10 MIN HIGH POWER ENGINE RUN WITH PACKS FULL HOT, NO ODORS NOTED. AIRCRAFT WAS GROUNDED. REPLACED THE APU IAW JC 26L31049003, COMPLETED TESTING.