What was found
ACRID BURNING SMELL FROM AIR VENTS DURING CLIMB-FL350 AND DESCENT -7000 LASTING 5 MIN EACH . FLIGHT DECK & FWD GALLEY HAS A UNIQUE ODOR, SMELL DISAPATES BEYOND FIRST CLASS. FOB 30.6 AT THE GATE. REF AMM 05-51-26. FOUND RECIRCULATION AIR FILTERS DIRTY. AS PRECAUTION REMOVED AND REPLACED BOTH RECIRCULATION FILTERS REF. AMM 21-25-01/401. FOUND CIC AROUND OUTER EGDGES OF PACK BY PANELS. CLEANED RESIDUAL CIC COMPOUND AND PERFORMED BURN OUT IAW MM 05-51-26. NO FOUL ODORS PRESENT AT THIS TIME.