As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED DUE TO AN ODOR IN THE VICINTY OF ROW 22 ABC, IDENTIFIED AS A BURNING RUBBER TYPE OF ODOR. CREW CHECKED, EMERGENCY DECLARED AND LANDED. MAINTENANCE ISOLATED THE ODOR TO THE LEFT ENGINE PRODUCING BURNING PLASTIC ODOR FROM THE NR 1 BLEED SYSTEM. AIRCRAFT WAS GROUNDED. MAINTENANCE ACCOMPLISHED 33L00021001 AND 33L00071002. NO LEAKS OR DISCREPANCIES NOTED. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.