What was found
CLIMBING THROUGH FL200, FLIGHT ATTENDANT DETECTED AN ODOR. PERFORMED QRH. NR 1 PACK OFF, NO CHANGE TO ODOR. NR 1 PACK ON, NR 2 PACK OFF, ODOR WAS WORSE. SWITCHED BACK TO THE NR 1 PACK, MAINTENANCE PERFORMED TSM TASK 05-50-00-810-831-A. BASED UPON FLIGHT CREW REPORTS, IDENTIFICATION LED TO THE NR 1 ENGINE. NR 2 ENGINE OR NR 1 PACK. ACCOMPLISHED TSM 71-00-00-810-802-A ON THE NR 1 AND #2 ENG. NO SIGNS OF OIL WETTING. D-RING ENG RUN UP RAN PACK 1 & 2, WITH ENG 1 AS SOURCE THEN ENG 2 AS SOURCE. PACKS WERE ISOLATED AND RAN INDIVIDUALLY. NO FUMES OR ODORS NOTED AT ANY POINT.