- - a. PURPOSE OF DATA In support of a major alteration to Gulfstream Aerospace Corporation Model GV-SP SN 5173. 9. APPLICABLE REOUIRE ME NTS (tsI Sosonit sonars) 14 CFR §§ 25.561(b1). .562(a1), .603(a). .785(b)(c). and .1541(a1)(b1)(02) through Amendment 25-98. lo Cenretcshou •lirter aultienly ,w.3“1