As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OZONE ODOR FROM PACKS WHILE ON HP BLEED, BUT NOT IP BLEED. COULDN'T TELL WHICH PACK; ACCOMPLISHED NR 1 ENGINE WASH. INSTALLED AND SECURED THE NR 1 AND 2 OZONE FILTERS IAW AMM 21-51-41. OPERATIONAL TESTED AND LEAK CHECKED SATISFACTORY. NR 2 ENGINE REMOVED AND REPLACED IAW AMM 71-00-20-400-040.