COMMONWEALTH OF AUSTRALIA CIVIL AVIATION ORDERS CIVIL AVIATION SAFETY AUTHORITY PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES AD/G159/43 Amdt 1 Fluorescent Lighting Installations Incorporating Series "66" Lamps 4/90 Applicability: All Gulfstream I aircraft. Requirement: Action in accordance with Gulfstream Aerospace Customer Bulletin No. 333. Required actions 1, 2, 3 and 4.1 only. Note: Aerospace Lighting Corp Information Bulletin 89-001 also refers. Compliance: Prior to 30 December 1989. Background: Gulfstream have advised of an inflight fire in the area of the installed fluorescent lighting. Although the exact cause of the fire is unknown, likely causes and precautionary actions are detailed in the requirement document. Amendment 1 to this AD is issued to clarify the required actions following requests from operators.