What was found
DURING TRANSIT CHECK, IT WAS DETECTED EVIDENCE FUEL LEAK WITH 90 DROPS BY MINUTE IN THE CENTRAL MAIN TANK. MAINTENANCE PERSONNEL PERFORMED EMPTIED CENTRAL MAIN TANK PROCEDURE, CENTER MAIN TANK REFUEL VALVES HAVE BEEN DEFERRED BY MEL 28-21-01-02 WITH FLIGHT NORMAL IN ACCORDANCE TO PROGRAM. AT STA MEX MAINTENANCE PERSONNEL PERFORMED CONDITIONAL INSPECTION IAW DMC-B787-A-28-11-00-05A-280A-A, DETECTING DAMAGES IN THE SEALED OF CENTRAL MAIN TANK SKIN. MAINTENANCE PERSONNEL PERFORMED VENTILATION AND REPAIR OF FUEL CENTRAL MAIN TANK IAW AMM DMC-B787-A-28-11-00-14A-663A-A, ALL CORRECT.