What was found
DURING INITIAL PHASE OF FLIGHT DISTINCT HEAVY ELECTRICAL SMELL NOTICED THROUGHOUT AIRCRAFT. ALL OVENS, GALLEYS & CIRCUIT BREAKERS CHECKED NORMAL. ALL DUCT TEMPERATURES NORMAL PNEUMATIC PACKS OPERATIONS NORMAL, ENGINE & HYDRAULIC OPERATIONS NORMAL. DURING DECENT & APPROACH ELECTRICAL BURNING SMELL WAS NOTICED AGAIN. UPON INSPECTION, RT RECERC FAN SHOWS SIGNS OF FAILURE. REPLACED SAME IAW AMM 21-25-02. OPERATED PACKS USING APU & ENGINE BLEEDS, NO DEFECTS NOTED. ROTABLE PARTS CHANGE WAS INDICATED TT 1198213 SN OFF 05208 FAN, AIR, DISTR OFF 29-2125-9-0001 5208 ON 29-2125-9-0001 3486