As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK ODOR IN THE CABIN DURING TAKE OFF-CLIMB OUT. NO ODOR DURING CRUISE. AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND APU LEAKING OIL AT APU GENERATOR SEAL PLATE. MAINTENANCE REMOVED THE GENERATOR, REPLACED O-RING AND SEAL PLATE AND REINSTALLED GENERATOR PER AMM 24-23-51. CLEANED APU COMPARTMENT PER AMM 49-00-00 AND PERFORMED AIR QUALITY AND DECONTAMINATION PER JOB CARDS 26L00021001, 26L00021002, AND 26L00021004.