As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED BURNING ODOR AT 22,000 FT. ODOR LASTED FOR APPROXIMATELY 15 SECONDS AND THEN DISSIPATED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED FAULT ISOLATION MANUAL TASK 72-00-00-810-814. NO DEFECTS WERE NOTED AT THAT TIME.