What was found
IAH - FLIGHT 3518, THE CREW REPORTED THAT AFTER ENGINE START THE CABIN FILLED WITH SMOKE. MAINTENANCE INSPECTED THE AIRCRAFT AND PLACED THE NUMBER TWO ACM ON MEL 21-50-2/C CONTROL NUMBER 015282, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. THE AIRCRAFT RETURNED TO IAH ON 08/30/01 WHERE MAINTENANCE REMOVED AND REPLACED THE NUMBER TWO ACM, REMOVED THE MEL, AND APPROVED THE AIRCRAFT FOR RETURN TO SERVICE.