What was found
FUMES OR SMOKE IN CABIN PNEUMATIC POWER SUPPLIED BY ENGINE ENGIN E 1 STRONG FUME SMELL WAS NOTICED IN THE FLIGHT DECK ON TAKE OFF AND INITIAL CLIMB TOMC LOCKING LOG PAGE TO ACCOMPLISH FIM SMOKE OR FUMES IN THE CABIN, SOURCE UNKNOWN - FAULT ISOLATION 21-00 TASK 806 ALSO ACCOMPLISH PACK BURN OUT WITH FILTER CHANGE UNLOCKED FOR SIGNOFF PERFORMED FIM 71-05 TASK 807-FUMES OR SMOKE IN CABIN PNEUMATIC SUPPLIED BY ENGINE. VERFIED ENG OIL NOT OVERSERVICED. VERIFIED NO OIL LEAKS. PLS NOTE: #1 ENG DID HAVE A WATER WASH ACCOMPLISHED BEFORE FLIGHT. PERFORMED ENG RUN AT 70% N1 FOR 10 MINS,WITH ENG BLEEDS ON, PACKS ON APU BLEED OFF, ISOLATION VALVE CLOSED REF AMM 72-21-00-640-801-800. NO ODOR OR FUMES PRESENT. REMOVED AND REPLACED BOTH AIR RECIRCULATION FLITERS REF AMM 21-25-01-00-801. AIRCRAFT OK FOR SVC -END-