As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A REPORTED BURNING RUBBER ODOR APPROX 4.0 HRS INTO FLIGHT, NEAR ROWS 4 & 5 LT SIDE. NO OTHER INDICATIONS. PERFORMED TSM 05-50-0-810-831A AND TSM TASK 24-00-00-810-823-A AND FOUND NO ELECTRICAL ODOR OR ELECTRICAL DAMAGE. PERFORMED LTV ELECTRICAL ODOR SYS INTEGRITY CHECK IAW MM 23-39-00. NO DEFECTS OR ELECTRICAL ODORS FOUND. R & R XEB AT 4LT, PRECAUTIONARY, IAW MM 23-39-00. OPS CHECK NORMAL.