737-SL-38-032 REV. F VACUUM WASTE CLEANING METHODS (SUPERSEDED BY SL 737-SL-38-032 REV. G). SERVICE LETTER MOS SUPERSEDED 51 737-SL-38-032 REV. G VACUUM WASTE CLEANING METHODS. SERVICE LETTER RECOMMENDED 51 01-APR-2014 737-SL-38-033 MOS FORWARD DOOR SILL DRAIN VALVE REPLACEMENT. SERVICE LETTER 10-FEB-2010 MOS SL 7