2005-09-01: Auxiliary power unit (APU) fuel tube assembly

2005-09-01 Cessna Aircraft Company: Amendment 39-14069. Docket No. FAA-2005-21026; Directorate Identifier 2005-NM-069-AD. Effective Date (a) This AD becomes effective May 10, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Cessna Model 750 airplanes, certificated in any category, serial numbers-0001 through-0240 inclusive. Unsafe Condition (d) This AD was prompted by reports of chafed auxiliary power unit (APU) fuel tubes leaking into the tail cone area of the airplane due to interference between the APU fuel tube assembly and elevator flight control cables, hydraulic lines, and high temperature bleed air couplings. The FAA is issuing this AD to detect and correct this interference, which could result in chafing, leaking into an area where ignition sources are present, and possible fire in an area without fire detection or extinguishing provisions. Compliance (e) You are responsible for having the actions required by thisAD performed within the compliance times specified, unless the actions have already been done. Inspections (f) For all airplanes: Within 25 flight hours or 48 days, whichever occurs first after the effective date of this AD, do a detailed inspection to verify the clearance and detect chafing of one of the APU fuel tube assemblies in the tail cone area of the airplane due to interference between the APU fuel tube and elevator flight control cables, hydraulic lines, and high temperature bleed air couplings. Do the actions in accordance with the Accomplishment Instructions of Cessna Alert Service Letter (ASL) ASL750-49-09, Revision 2, dated March 10, 2005. Do applicable corrective actions before further flight in accordance with the ASL. Repeat the inspection thereafter at the earlier of the times specified in paragraphs (f)(1) and (f)(2) of this AD. (1) At intervals not to exceed 250 flight hours or 3 months, whichever occurs first. (2) Before further flight after access to the inspection area for any other inspection or maintenance. Note 1: For the purposes of this AD, a detailed inspection is: "An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required." APU Replacement (g) For airplanes having serial numbers -0001 through -0031 inclusive and -0033 through -0107 inclusive: Before the first inspection required by paragraph (f) of this AD, replace the APU fuel tube in the tail cone area of the airplane, in accordance with Cessna Service Bulletin SB750-49-05, Revision 1, dated January 17, 2000. The replacement APU fuel tube must be a new APU fuel tube having part number 6756605-23. Report (h) At the applicable time specifiedin paragraph (h)(1) or (h)(2) of this AD, report the results (both positive and negative findings) of the initial inspection required by paragraph (f) of this AD, in accordance with Cessna ASL ASL750-49-09, Revision 2, dated March 10, 2005. Information collection requirements contained in this AD have been approved by the Office of Management and Budget (OMB) under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have been assigned OMB Control Number 2120-0056. (1) If the inspection was done after the effective date of this AD: Submit the report within 30 days after the inspection. (2) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD. Alternative Methods of Compliance (AMOCs) (i) The Manager, Wichita Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR39.19. Material Incorporated by Reference (j) To perform the actions that are required by this AD, you must use Cessna Alert Service Letter ASL750-49-09, Revision 2, dated March 10, 2005; and Cessna Service Bulletin SB750-49-05, Revision 1, dated January 17, 2000; as applicable, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. For copies of the service information, contact Cessna Aircraft Co., PO Box 7706, Wichita, Kansas 67277. To view the AD docket, go to the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC. To review copies of the service information contact the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.