What was found
MEX - FLT 884 - AFTER TAKEOFF, ELECTRICAL SMELL AND SMOKE WAS NOTED IN CABIN BY FLIGHT CREW. AIRCRAFT AIR INTERRUPTED, RETURNED MEX AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED OPERATIONS CHECK OF ELECTRICAL EQUIPMENT. UNABLE TO DUPLCIATE ELECTRICAL SMOKE SMELL. AS A PRECAUTIONARY, CHANGED COALESCER BAGS. OPERATED PACKS WITH ENGINES AND APU WITH NO SMOKE OR ELECTRICAL SMELL NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)