S 51 737-SL-29-097 INCORRECT SADDLE-TYPE TUBE CLAMPS INSTALLED. SERVICE LETTER MOS 24-JUL-2007 51 737-SL-29-099 CORROSION-RESISTANT HYDRAULIC FUSES (SUPERSEDED BY 737-SL-29-099-A). SERVICE LETTER MOS 28-AUG-2007 51 737-SL-29-099 REV. A CORROSION-RESISTANT HYDRAULIC FUSES. SERVICE LETTER MOS