99 - (s) SL 737-SL-22-040 REV. B AUTOPILOT FLIGHT CONTROL COMPUTER IMPROVEMENTS.. SERVICE LETTER MOS I0-FEB-2000 - (s) SL 737-SL-22-043 737 AUTO THROTTLE COMPUTER. SERVICE LETTER MOS 08-MAR-2000 - (s) SL 737-SL-22-044 FCC SOFTWARE UPDATE (-705), SERVICE LETTER MOS 31-MAY-2000 -(s) SL 737-SL-22-045 A