What was found
MEX-IAH - FLT 418 - AT ARRIVING CAPTAIN INFORMED A REPETITIVE REPORT RELATED WITH PRESSURIZATION, DFW TECHNICIAN INFORMED TO FAA AUTHORITIES. IT WAS PERFORMED A BITE TO BOTH PRESSURE CONTROLS, GIVING AS A RESULT AN ACTUATOR FAIL, IT WAS CHANGED DURING TRANSIT CHECK. AT MEX RON, ELECTRONIC PERSONNEL CONFIRMED AIRCRAFT WITHOUT REPORTS AFTER CHANGE. TESTS OK IAW MM 21-32-5. (M)