What was found
A BURNING ODOR WAS REPORTED, ONE HOUR INTO THE FLIGHT FROM ROWS 18-20, THEN DISAPPATED. PERFORMED INSPECTION OF CABIN ROWS 18-20 IAW TSM 05-50-00-810-831-A. NO EVIDENCE WAS FOUND OF ANYTHING BURNING OR SMOKING. UPON CHECKING PFR, A LAVATORY SMOKE DETECTOR FAULT. INSPECTED IAW TSM 26-17-00-810-801-A, NO EVIDENCE OF ANY SMOKE OR BURNING. ALL INSPECTIONS COMPLETED WITH NO ISSUES FOUND. LTV SYSTEM ELECTRICAL ODOR INTEGRITY WAS ALSO CHECKED FROM ROWS 18-20. ACCOMPLISHED ELECTRICAL ODOR INTEGRITY CHECK OF CABIN ROWS 18-20 IAW LTV-535 23-39-00 PAGES 5027-5028 PART B. NO EVIDENCE OF BURNING OR ELECTRICAL ODOR. OPS CHECK PASSED.