What was found
ON FLIGHT 2860 THE CREW REPORTED WITH NR 1 PACK ON ONLY THEY DETECTED A SMELL ON THE FLIGHT DECK. NO SMELLS IN CABIN. SMELL DETECTED THOUGHOUT THE FLIGHT. COMPLIED WITH EMB FIM TASK 21-20-00 AND ETN EM-72-034. FOUND NR 1 PACK TO HAVE A SMELL IN HOT MODE. RAN LEFT PACK FOR 4 HOURS ON HOT WITH APU PNEUMATICS AND LEFT ENGINE ODOR DISSIPATED AFTER 1 HOUR AND DID NOT RETURN. RAN LEFT PACK IAW EMB MM 21-00-00. MEL RESTORED. THE AIRCRAFT WAS RETURNED TO SERVICE.