4-NOv-2008 SL 737-SL-00-023 REV. B SMOKE AND BURNING ODOR (SBO) EVENT SUMMARY. SERVICE LETTER INFORMATIONAL MOS 17-DEC-2009 SL 737-SL-00-024 BOEING TECHNICAL COMMUNICATIONS (SUPERSEDED BY SL 737-SL-00-024 REV. A). SERVICE LETTER SUPERSEDED MOS SL 737-SL-00-024 REV. A BOEING TECHNICAL COMMUNICATIONS. SERVICE LETTER