MOS WING TRAILING EDGE - INBOARD MAIN FLAP AND OUTBOARD AFT FLAP DISBONDS. SERVICE LETTER MOS SUPERSEDED RECOMMENDED 51 737-SL-57-083 LEADING EDGE SLAT ASSEMBLY PART NUMBER IDENTIFICATION. SERVICE LETTER NOT APPLICABLE 51 06-OCT-2005 737-SL-57-084 MOS FUEL LEAK FROM NUMBER 5 SLAT. INBOARD TRACK CAN. SER