What was found
ON CLIMBOUT, THERE WAS A STRONG ODOR OF ELECTRIC WIRE BURNING. EMERGENCY DECLARED. AIR TURN BACK (ATB) TO CVG. REF LP 39228-63/3 & 39228-65/2 FOR TROUBLESHOOTING & WORK PERFORMED. NO DEFECTS NOTED. LP 39228-63/3 PERFORMED INSPECTION OF ALL C/BS & PACK BAYS. PERFORMED HIGH POWER ENG RUNS IAW AMM 71-00-00. PERFORMED 05-51-56 INSPECTION IAW AMM WHICH INCLUDES AMM 21-00-21. REMOVAL OF OIL CONTAMINATION AT PACK. PNEUMATIC SYSTEM, NO ODORS. LP 39228-65/2 INSPECTED MEC FOR ELECTRICAL BURNING OR ODOR PER AMM 20-66-04, NO DEFECTS. OPS LT & RT PACKS INSPECTED FOR ODOR OR ELECTRICAL BURNING PER AMM 21-51-00, NO DEFECTS. OPS CHK & INSPECTION OF FLT DECK LIGHT INDICATORS PER AMM 33-13-00, NO DEFECTS. INSPECTED & OPS CHK ALL FLT DECK WINDOW WIRING & HEAT SYS PER AMM 30-41-00, NO DEFECTS. INSPECTED LAV, GALLEY, & HOT CUP PER AMM 25-41-00 AND 25-31-00. NO DEFECTS. CHKD CAPT / FO'S FOOT / SHOULDER HEATERS PER AMM 21-45-11, NO DEFECTS. OPS CHKD WXR SYS PER AMM 34-43-00, NO DEFECTS. INSPECTED LT & RT CU'S PER AMM 34-61-02, NO DEFECTS. PER MC REQUEST R & R CDU IAW AMM 34-61-02, OPS CHECKED GOOD. ACCOMPLISHED EVAL FLT PER M-281. NO DEFECTS NOTED. ACFT REMAINS NO ETOPS. ACFT RETURNED TO SERVICE.