on Mark Aircraft Total Time: 6728.0 Aircraft Total Landings: 3057 Work Order No.: 17964 21 September 2007 Date Accomplished upgrade of existing Allied Signal Enhanced Ground Proximity Warning System from a software version 104-104 to 218-218 UAW Gulfstream STC ST01851AT-D and Gulfstream Custom Engineering Drawing List CE41 4960458 and EGPWS Win