What was found
DURING FLIGHT TAI-457 FROM SAL TO UIO, THE PILOT IN COMMAND REPORTED: "NAV GPWS TERRAIN DETECTION FAULT, NO OVERWEIGHT LANDING", THEREFORE, THE FLIGHT ATB. ONCE THE AIRCRAFT WAS POSITIONED AT THE MAINTENANCE RAMP, AND AS PER TSM 34-38-00-810-825-A, THE GPWC WAS REPLACED IN ACCORDANCE WITH AMM 34-48-34 PB 401 AND REQUIRED FUNCTIONAL TEST PERFORMED WITH NORMAL RESULTS. AFTER EXECUTING THE ABOVE MENTIONED ACTIONS, THE AIRCRAFT WAS RETURNED TO SERVICE.