TAIRS HANDRAIL FITTING ATTACHMENT TO YRC FWD LAVATORY. SERVICE LETTER MOS 24 (s) 13-DEC-2005 SL 737-SL-25-124 NEW FLAMMABILITY REQUIREMENT FOR THERMAUACOUS11C INSULATION MATERIALS. SERVICE LETTER MOS 06-JAN-2006 SL 737-SL-25-124 REV. A NEW FLAMMABILITY REQUIREMENT FOR THERMAUACOUSTIC INSULATION MATERIALS. SERVICE LETTER M