What was found
FLT 1434, SJU-FLL (DIVERTED TO MCO). NOTICED DURING CRUISE THAT THE FUEL TRANSFER VALVES HAD LATCHED CLOSED, AS PER MEL 28-15-01C, THOSE VALVES WERE LATCHED OPEN AND SHOULD HAVE STAYED OPEN FOR THE DURATION OF THE FLIGHT.; REF MDDR C/N 460173, ACCOMPLISHED MX ACTION PER AMM 28-15-00-040-001, L/H TRANSFER VLV REMAINS OPEN. ACCOMPLISHED MX ACTION PER AMM 28-15-00-040-002, R/H TRANSFER VLV REMAINS OPEN. NO ADDITIONAL MX ACTION REQ'D.