737-SL-22-052 REV. C COLLINS ENHANCED DIGITAL FLIGHT CONTROL SYSTEM, SERVICE LETTER RECOMMENDED MOS 29-JUL-2010 SL 737-SL-22-053 09-FEB-2004 COLLINS FCC SOFTWARE UPDATE (-120). SERVICE LETTER MOS INFORMATIONAL SL 737-SL-22-054 POTENTIAL CHAFFING OF W3397 WIRE BUNDLE TO M1020 ELEVATOR CONTROL'. SERVICE LET