2003-11-07: Oxygen Shutoff Valve

2003-11-07 Israel Aircraft Industries, Ltd.: Amendment 39-13166. Docket 2002-NM-290-AD. Applicability: All Model 1121, 1121A, 1121B, 1123, 1124, and 1124A series airplanes; certificated in any category. Compliance: Required as indicated, unless accomplished previously. Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent rapid adiabatic compression within the oxygen line between the oxygen shutoff valve and the pressure regulator due to a shutoff valve that can be opened quickly, which could result in overheating of the oxygen system, and consequent fire in the cockpit, accomplish the following: Removal and Installation of Oxygen Shutoff Valve (a) Within 250 flight hours after the effective date of this AD, remove the existing oxygen shutoff valve and install a new oxygen shutoff valve, per the Accomplishment Instructions of the applicable service bulletin specified in Table 1 of this AD, as follows: Table 1.--Service Bulletins For model-- Service bulletin-- 1121, 1121A, 1121B series airplanes 1121 Commodore Jet (Israel Aircraft Industries, Ltd.) Service Bulletin 1121-35-024, dated September 23, 2002. 1123 series airplanes 1123--Westwind (Israel Aircraft Industries, Ltd.) Service Bulletin 1123-35-048, dated September 23, 2002. 1124 and 1124A series airplanes 1124--Westwind (Israel Aircraft Industries, Ltd.) Alert Service Bulletin 1124-35-137, dated September 23, 2002. Alternative Methods of Compliance (b) 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, International Branch, ANM-116, FAA, Transport 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, International Branch, ANM-116. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the International Branch, ANM-116. Special Flight Permits (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. Incorporation by Reference (d) The actions shall be done in accordance with the applicable service bulletin specified in Table 2 of this AD as follows: Table 2.--Service Bulletins Service Bulletin-- 1121 Commodore Jet (Israel Aircraft Industries, Ltd.) Service Bulletin 1121-35-024, dated September 23, 2002. 1123-Westwind (Israel Aircraft Industries, Ltd.) Service Bulletin 1123-35-048, dated September 23, 2002. 1124-Westwind (Israel Aircraft Industries, Ltd.) Alert Service Bulletin 1124-35-137, dated September 23, 2002. 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, P.O. Box 2206, Mail Station D25, Savannah, Georgia 31402. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Note 3: The subject of this AD is addressed in Israeli airworthiness directive 35-02-10-12, dated October 17, 2002. Effective Date (e) This amendment becomes effective on July 3, 2003.