LATION. • G2B-20895-1371, REV IR, DATED 8/9/04, TITLED - ELT ANTENNA INSTALLATION. • ER01489, REV IR, DATED 8/9/04, TITLED SUBSTANTIATION REPORT, ELT & EGPWS INSTALLATION FOR GULFSTREAM G1159B, S/N 151 REFERENCE FAA FORM 8110-3 DATED 8/9/04 BY STRUCTURES DER NO. DERT-810028-NE. THE NEW EQUIPMENT AND ASS