95-25-10: Outflow/Safety Valve

95-25-10 CESSNA AIRCRAFT COMPANY: Amendment 39-9456. Docket 95-NM-56-AD. Applicability: Model 441, 500, 550, and 560 series airplanes; equipped with Allied Signal outflow/safety valves; as identified in Allied Signal Aerospace Service Bulletins 103576-21-4054, 103576-21-4056, and 103648-21-4055, all dated January 30, 1995; certificated in any category. 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 use the authority provided in paragraph (c) of this AD to request approval from the FAA. This approval may address either no action, if the current configuration eliminates the unsafe condition; or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any airplane from the applicability of this AD. Compliance: Required as indicated, unless accomplished previously. To prevent cracking and subsequent failure of the outflow/safety valves, which could result in rapid decompression of the airplane, accomplish the following: (a) Within 18 months after the effective date of this AD, replace the outflow/safety valve in accordance with Allied Signal Aerospace Service Bulletin 103576-21-4054 (for Model 441 series airplanes), 103576-21-4056 (for Model 500 and 550 series airplanes), or 103648-21-4055 (for Model 560 series airplanes), all dated January 30, 1995, as applicable. (b) As of the effective date of this AD, no person shall install an outflow/safety valve, having a part number and serial number identified in Allied Signal Aerospace Service Bulletin 103576-21-4054 (for Model 441 series airplanes), 103576-21-4056 (for Model 500 and 550 series airplanes), or 103648-21-4055 (for Model 560 series airplanes), all dated January 30, 1995, on any airplane unless that valve is considered to be serviceable in accordance with the applicable service bulletin. (c) 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, Los Angeles Aircraft Certification Office (ACO), 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, Los Angeles ACO. NOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Los Angeles ACO. (d) 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. (e) The replacement shall be done in accordance with Allied Signal Aerospace Service Bulletin 103576-21-4054, dated January 30, 1995; Allied Signal Aerospace Service Bulletin 103576-21-4056, dated January 30, 1995; or Allied Signal Aerospace Service Bulletin 103648-21-4055, dated January 30, 1995, 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 Allied Signal Inc., Controls and Accessories, 1110 North Oracle Road, Tucson, Arizona 85737-9588. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the FAA, Los Angeles Aircraft Certification Office, Transport Airplane Directorate, 3960 Paramount Boulevard, Lakewood, California; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on January 22, 1996.