What was found
FUME EVENT. PERFORMED CABIN ODOR IDENTIFICATION IAW TSM 05-50-00-810-831-A, PERFORMED TSM TYPES 1-7, PERFORMED GVI OF APU IAW TSM 49-00-00, NO LEAKS FOUND. PERFORMED GVI OF ENGINE 1 & 2 IAW TSM 71-00-00, NO LEAKS FOUND. PERFORMED GVI FOR PACKS 1 & 2 IAW TSM 21-00-00, NO FAULTS OR LEAKS FOUND, . PERFORMED GVI OF HYDRAULIC SYSTEM FOR LEAKS IAW AMM 29-00-00, COULD NOT DUPLICATE ODOR THAT CREW REPORTED. THE CAUSE OF THE CABIN ODOR IS TYPE 9 MISC. CABIN ODOR. NO ODORS FOUND IN THE CABIN OR COCKPIT. AIRCRAFT OK TO RETURN TO SERVICE.