BOARD EDGE OF STRAP AT STRINGER 18A. SERVICE LETTER MOS 09-OCT-2007 SL 737-SL-53-083 POSSIBLE GAP COMMON TO THE BODY STATION 203 WATERLINE 234 INNER CHORD SPUCE STRUCTURE (SUPERSEDED BY SL 737-SL-53-083 REV. A). SERVICE LETTER MOS 09-NOV-2007 SL 737-SL-53-083 REV. A POSSIBLE GAP COMMON TO THE BODY STATION 203 WATER