What was found
LHR - FLT 57 - AFTER TAKEOFF LHR WHILE EN ROUTE TO MIA, CREW SMELLED SMOKE IN FORWARD GALLEY AREA. FORWARD CABIN TEMPERATURE LIGHTS ILLUMINATED, PASSENGER 02 LIGHT ILLUMINATED AND DROPPED 02 MASKS, VARIOUS CIRCUIT BREAKERS POPPED. CREW DECLARED AN EMERGENCY AND AIR INTERRUPTED BACK TO LHR AND LANDED WITHOUT INCIDENT. CHAFED WIRE BUNDLE ABOVE FIRST CLASS CENTRAL CLOSET AREA WAS REPAIRED ACCORDING TO AIRCRAFT WIRING MANUAL CHAPTER 20. ALL RELEVANT CIRCUITS TESTED NORMAL. O2 MASKS RESTOWED, AND MANUAL 02 TEST PERFORMED NORMAL. FORWARD TEMPERATURE CONTROL OPERATION CHECKS NORMAL. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)