What was found
CABIN ODOR OF DIRTY SOCKS OR MUST. PERFORMED TSM 05-50-00-810-831-A. FOUND THE APU TO BE SOURCE OF THE ODOR. COMPLIED WITH DECONTAMINATION OF THE ECS IAW AMM 21-00-00. R & R THE RECIRCULATION FILTERS IAW AMM 21-21-41. NO FURTHER ODOR NOTED AT THIS TIME. THE ACFT WAS OK FOR SERVICE. REMOVED & REPLACED THE APU OIL PRESSURE SWITCH IAW AMM 49-94-11. OPS AND LEAK CHECKED GOOD. PERFORMED OPS TEST OF AIR CONDITION PACKS 1 & 2 IAW AMM 21-00-00. OPS TESTED GOOD. NO ODOR DETECTED. FOLLOWING TSM 49-00-00-810-921-A, AND FOUND THE SORUCE OF THE LEAK TO THE STARTER 8KA. R & R THE SEAL ON STARTER IAW AMM 49-42-51. OPS & LEAK CHECKED GOOD.