What was found
CREW REPORTED SMOKE IN COCKPIT ALSO EICAS FOR SMOKE IN FCR AT FL 050. CREW INVESTIGATED FCR BUT NOTHING SPECIFIC. CHECKED ALL RECIRCULATION AND GASPER FANS, FCR HEATER, NO EVIDENCE OF ELECTRIC BURNING CONDITION. ACCOMPLISHED REQUIRED TASKS OF ECS PER AVO ECS170404-2883-1 ALSO NO EVIDENCE OIL CONTAMINATION IN WATER COLLECTOR, OZONE CONVERTER, RE-HEATER/CONDENSER AND DUAL HEAT EXCHANGER. REPLACED ACM PER AMM 21-52-02-401. PERFORMED CABIN AIR TEMP CONT SYSTEM WITH BOTH ENG RUN AND ALSO USED APU. SAT.