As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT DETECTED A BURNING ODOR. F/O WENT BACK AND DETECTED THE BURNING ODOR MORE INTENSELY. NO SMOKE OBSERVED. LANDED UNEVENTFULLY. CLEANED BOTH SOCKS & WATER SEPARATORS, OZONE CONVERTORS AND AU DUCTING ASSOCIATED. ALSO CLEANED DUCTING FROM ACM'S TO AFT PRESSURE BULKAGE. REINSTALLED PRESSURIZATION CHECKED GOOD. LEAK CHECKED GOOD IAW MM 20-301-01. OPS CHECKED SATISFACTORY.