What was found
LHR - FLT 142 - EN ROUTE JFK/LHR DURING CRUISE, AFT B-C GALLEY CHILLER MADE NOISES AND SLIGHT SMOKE NOTED. TURNED OFF POWER TO AFT B-C GALLEY CHILLER AND AIRCRAFT PROCEEDED TO LHR, LANDING WITHOUT INCIDENT. PLACARDED AFT B-C GALLEY CHILLER INOPERATIVE. SUBSEQUENTLY, AT DFW/22, CLEANED AFT B-C GALLEY CHILLER OUTLET SCREEN. CHILLER OPERATION CHECKED NORMAL WITH NO NOISES OR SMOKE NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION AND PLACARD REMOVED. (M)