What was found
IAH - FLIGHT 2984, THE CREW REPORTED SMOKE IN THE CABIN DURING FLIGHT. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT, AND PLACED THE APU ON MEL 49-00-00 CTL NUMBER 116866, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. FLIGHT 2272 OUT OF IAH THE CREW REPORTED A SMOKE SMELL AND LAV SMOKE INDICATION, THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT, REMOVED AND REPLACED THE APU, OPERATIONALLY AND LEAK CHECKED WITH NO DEFECTS NOTED. THE MEL WAS REMOVED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE