What was found
DURING MAYOR CHECK, MANUALLY OPERATED THE TRANSFER SYSTEM DISCHARGE CHECK VALVE, BETWEEN RIB 1 AND RIB 2 WERE FOUND MATALLIC PARTICLES AND DEBRIS. LT AND RT ENGINE FUEL FILTER ELEMENTS WERE REMOVED AND REPLACED IAW AMM 73-12-42, REVISION 42, AMM 57-27-11, REVISION 42. LT AND RT FUEL TANKS ACCESS PANELS WERE REMOVED AND FUEL TANKS WERE CLEANED AND INSPECTED, NO MICROBIOLOGICAL PARTICLES WERE FOUND, INSTALLED THE ACCESS PANELS IAW AMM 28-42-00. THE STATUS REPORT (BITE)WAS PERFORMED WITH SATISFACTORY RESULTS IAW AMM 71-00-00-710-012-B REVISION 42. THE IDLE LEAK CHECK WAS PERFORMED AND NO LEAKS WERE FOUND. THE AIRCRAFT RETURN TO NORMAL OPERATION.