What was found
AT LIFTOFF, SMOKE ODOR WAS IN THE CABIN. COMPLIED WITH THE SMOKEE CHECKLIST BUT DISSIPATED RAPIDLY DURING CLIMB OUT. TROUBLESHOT IAW FIM 21-00. NO TROUBLE FOUND. INSPECTED CABIN ELECTRICAL COMPONENTS ALL GOOD. INSPECTED ENGINES INCLUDING 2.5 BLEED VALVE PORTS. ALL CHECKED GOOD. RAN ENGINES FOR 15 MINUTES AT VARIOUS SETTING INCLUDING TAKEOFF POWER. NO SMOKE OR HAZE NOTED. RECIRCULATION FANS CHECK GOOD. REPLACED BOTH HEPA FILTERS IAW AMM 21-35.