As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIRTY SOCK ODOR INSIDE ACFT AT LOW POWER SETTINGS. REPLACED 4 CLOGGED AIR COND PACK DRAIN LINES, ALL OTHERS CHECK CLEAR. OPERATED BOTH ENGINES & APU, & PERFOMED AMM TASK 21-00-00-160-801, REMOVAL OF ODOR FROM AIR COND DUCTS. NO FURTHER BAD SMELL, DIRTY SOCK OR ABNORMAL ODORS NOTED. RETURNED TO SERVICE.