As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VERY STRONG ODOR FROM PACKS AFTER TAKEOFF. REPLACED LT AND RT RECIRC FILTERS PRECAUTIONARY PER MM. SEE HISTORY OF ODOR PROBLEMS. UNABLE TO ISOLATE SOURCE. REQUESTED OUTBD CREW COMMENT TO ASSIST IN ISOLATING SOURCE. OPERATED BOTH PACKS ON THE GROUND WITH APU. NO ODORS PRESENT. RPL L PACK PLENUM.