737-SL-34-168 ENHANCED GROUND PROXIMITY WARNING COMPUTER UPGRADE. SERVICE LETTER MOS 22-OCT-2002 INFORMATIONAL INFORMATIONAL SL 737-SL-34-169 HONEYWELL TCAS COMPUTER CHANGE-CORRECTION FOR NUISANCE TRAFFIC ADVISORIES ON GROUND TARGETS.. INFORMATIONAL SERVICE LETTER MOS 14-OCT-2002 - (s) St 737-SL-34-169 REV.