E OF DATA Design approval in support of installation modifications to Gullstream G-IV Series aircraft, serial number 1085. registration no. N423TT. Avionics/Electrical Systems 8 Equipment Design Approval Only. 9 APPLICABLE REOUIREMENTS OF !TILE II CFR (del specific seams) FAR 25.869 (a)(4); Arndt 25-72 FAR 25.1353 (b)(d)(1)(2); Amdt. 25-11