What was found
.SHIP 3251 DISC: POSSIBLE DIRTY SOCK ODOR DETECTED BY FA & GATE AGENT GETTING ON AIRCRAFT IN CHS - ALSO "SWEET" CRAYON SMELL NOTED. C/A: FOUND OIL AT APU PLENUM/ SEAL. REF LOG 0590544 FOR FURTHER CORRECTIVE ACTION. FWD APU TO MEL 49-10-01A. NO "M" PROCEDURES. MEL & PLACARD INSTALLED. PER MCC, REQUIRES APU CHANGE. CONT ON DEFERRAL. CLEANED COMPARTMENT AND INTAKE DUCT AS REQUESTED REF AMDS W/C 4916-2001. APU CONT ON MEL. (LP: 5864696)