AD 93-10-04

93-10-04 GULFSTREAM AEROSPACE CORPORATION: Amendment 39-8582. Docket 92-NM-222-AD. Supersedes AD 89-05-05, Amendment 39-6198. Applicability: All Model G1159 (G-II), G1159A (G-III), G1159B (G-IIB), and G-IV series airplanes, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent fire bottles being discharged into the wrong nacelle, accomplish the following:

(a) Within 3 days or 10 hours time-in-service after May 8, 1989 (the effective date of AD 89-05-05, Amendment 39-6198), whichever occurs later, perform an inspection to determine proper configuration of electrical power leads to the engine fire extinguishing system, in accordance with the following Gulfstream Alert Customer Bulletins, dated February 2, 1989: G-II Bulletin No. 20 (for Model G1159/G1159B series airplanes); G-III Bulletin No. 4 (for Model G1159A series airplanes); or G-IV Bulletin No. 5 (for Model G-IV series airplanes); as applicable. If the configuration is not correct, prior to further flight, correct the installation in accordance with the applicable alert customer bulletin.

(b) Immediately following any maintenance performed on the engine fire extinguishing system, perform the inspection procedures required by paragraph (a) of this AD in accordance with the applicable alert customer bulletin to ensure that the system is functioning properly.

(c) Within 2 years after the effective date of this AD, modify the electrical leads and plumbing connections to the fire extinguishers in accordance with the following Gulfstream Aircraft Service Changes: Gulfstream II/IIB Change No. 401, dated December 6, 1991 (for Model G1159/G1159B series airplanes); Gulfstream III Change No. 195, dated December 6, 1991 (for Model G1159A series airplanes); or Gulfstream Change No. 146, dated September 5, 1991 (for Model G-IV series airplanes); as applicable. Accomplishment of this modification constitutes terminating action for theinspection procedures required by paragraph (b) of this AD.

(d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Atlanta Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Atlanta ACO.

NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Atlanta ACO.

(e) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

(f) The inspections shall be done in accordance with Gulfstream G-II Alert Customer Bulletin No. 20, dated February 2, 1989 (for Model G1159/G1159B series airplanes); Gulfstream G-III AlertCustomer Bulletin No. 4, dated February 2, 1989 (for Model G1159A series airplanes); or Gulfstream G-IV Alert Customer Bulletin No. 5, dated February 2, 1989 (for Model G-IV series airplanes); as applicable. The modification shall be done in accordance with Gulfstream II/IIB Aircraft Service Change No. 401, dated December 6, 1991 (for Model G1159/G1159B series airplanes); Gulfstream III Aircraft Service Change No. 195, dated December 6, 1991 (for Model G1159A series airplanes); or Gulfstream IV Aircraft Service Change No. 146, dated September 5, 1991 (for Model G-IV series airplanes); as applicable. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Gulfstream Aerospace Corporation, Technical Operations Department, P.O. Box 2206, Savannah, Georgia 31402-9980. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington;or at the FAA, Small Airplane Directorate, Atlanta Aircraft Certification Office, Suite 210C, 1669 Phoenix Parkway, Atlanta, Georgia; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

(g) This amendment becomes effective on July 1, 1993.