As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UPON BOARDING SMELLED FOWL ODOR THAT WAS A COMBINATION OF BARNYARD OILY BURNING THAT CONTINUED THROUGHOUT THE FLIGHT. REPLACED APU OIL COOLING FAN PER AMM 49-52-51 (AALA202108305659) AND APU OIL COOLER (AALA202108309224) PER AMM 49-91-44. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED.