What was found
SMOKE IN COCKPIT WHEN LEFT PACK WAS TURNED ON TEMPERATURE APPROXIMATELY 170 DEGREES. SEE PREVIOUS WRITE-UP LOG PAGE 000717. DMI 16389 MAINTENANCE CONTROLLER DIFFERED PER MEL 21-1-1 CATEGORY "C". REF. DMI 16389 SMOKE IN COCKPIT WHEN LEFT PACK WAS TURNED ON TEMPERATURE APPROXIMATELY 170 DEGREES. SEE PREVIOUS WRITE-UP LOG PAGE 000717. OPERATED PACKS SEVERAL TIMES WITH APU AND ENGINE BLEEDS. CHANGED PACK VALVE PRECAUTIONARY IAW M/M 21-55-71. INSPECTED PREVIOUS SPLICE REPAIR NO FAULTS. TESTED PACK COOLING FAN OPERATION NO FAULTS PER M/M 21-11-00. THIS CLEARS DMI 16389.