As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUE TO ENGINE 2 REMOVAL FOR OIL WETTING FOUND IN THE COMPRESSOR, REPLACE THE OZONE CONVERTER, DUAL HEAT EXCHANGER, CONDENSER / REHEATER AND FLIGHT DECK AIR DISTRIBUTION MUFFLER. REF FIM 21-00 TASK 808. PREVIOUS ENGINE REMOVALS FOR THIS CONDITION HAVE SHOWN OIL ODOR MAY RETURN BRIEFLY AT A LATER TIME WHEN THESE COMPONENTS WERE NOT REPLACED.