As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG FUMES ON APU START UP. ALL OTHER PARAMETERS NORMAL. UPON INSPECTION OF ODOR IN THE CABIN FOUND BIRD REMAINS IN THE APU INLET. INSPECTED APU INLET AND RAN PACKS PER EFIM 1-8458. NO ODOR IN THE CABIN AND COCKPIT. C/W ODI PREVENTION SMOKE FUMES. AIRCRAFT OK TO RETURN TO SERVICE. REF LOG 1773325. (LP# 7438278)