As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, F/A REPORTED SMOKE IN CABIN. NO SMOKE OBSERVED ON FLIGHT DECK. ODOR WAS LIKE DIRTY SOCKS. ISOLATED ODOR TO MOTOR. REPLACED RECIRCULATION FAN FILTER. ACCOMPLISHED OIL CONTAMINATION REMOVAL FROM AIR CONDITIONING & PNEUMATIC SYS, TASK 21-00-01-100-801. OPS CHECKED NORMAL. NO DEFECTS NOTED. ODOR WAS ASSOCIATED WITH BORESCOPE PLUG PENETRANT OIL.