What was found
AFTER CLIMB AND LEVEL OFF, FAINT SMOKE ODOR DETECTED IN THE COCKPIT. SHUTDOWN LT PACK TO ISOLATE AND SMOKE BECAME VISIBLY GREATER AND MORE PUNGENT. LT PACK BACK ON WITH RT PACK ON, ODOR STILL EVIDENT. COMPLIED WITH FIM 21-00-21-810-802. RAN BOTH ENGINES AND PACKS. NO SMOKE OR FUMES PRESENT.