As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONCOMING CREW REPORTED TO MX THERE WAS A SMELLY SOCK ODOR WHEN THEY TURNED ON APU BLEED. MX TROUBLESHOT AND FOUND THE APU TO BE OVERSERVICED. MX RAN BLEEDS TO BURN OUT PACKS AND BLEED LINES NO ODOR REMAINED. PERFORMED TSM FOR ODOR EVENT, FOUND APU OVER SERVICED. CLEANED UP OIL IN INTAKE, NO OTHER DEFECTS FOUND AT THE TIME. REF: TSM 05-50-00-810-831-A