2008-09-23: Critical Design Configuration Control Limitations (CDCCL)

2008-09-23 Bombardier, Inc. (Formerly Canadair): Amendment 39-15504. Docket No. FAA-2008-0268; Directorate Identifier 2008-NM-050-AD. Effective Date (a) This airworthiness directive (AD) becomes effective June 6, 2008. Affected ADs (b) None. Applicability (c) This AD applies to all Bombardier Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) airplanes, certificated in any category, all serial numbers. Subject (d) Air Transport Association (ATA) of America Code 28: Fuel. Reason (e) The mandatory continuing airworthiness information (MCAI) states: Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards introduced in Chapter 525 of the Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non-compliances were then assessed using Transport Canada Policy Letter No. 525-001, to determine if mandatory corrective action is required. The assessment showed that it is necessary to introduce Critical Design Configuration Control Limitations (CDCCL), in order to preserve critical fuel tank system ignition source prevention features during configuration changes such as modifications and repairs, or during maintenance actions. Failure to preserve critical fuel tank system ignition source prevention features could result in a fuel tank explosion. Revision has been made to Bombardier CL-600- 2C10, CL-600-2D15, CL-600-2D24 Maintenance Requirements Manual, CSP B-053, Part 2, Section 3, "Fuel System Limitations" to introduce the required CDCCL. The corrective action is revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to include the CDCCL data. Actions and Compliance (f) Unless already done, do the following actions. (1) Within 60 days after the effective date of this AD, or before December 16, 2008, whichever occurs first, revise the ALS of the Instructions for Continued Airworthiness to incorporate the CDCCL data specified in CRJ 700/900 Series Regional Jet (Bombardier) Temporary Revision 2-222, dated March 30, 2006, to Section 3, "Fuel System Limitations," of Part 2 of Bombardier CL-600-2C10, CL-600- 2D15 and CL-600-2D24 Maintenance Requirements Manual CSP B-053. Note 1: The actions required by paragraph (f)(1) of this AD may be done by inserting a copy of the TR into the maintenance requirements manual. When the TR has been included in the general revision of the maintenance program, the general revision may be inserted into the maintenance requirements manual, provided the relevant information in the general revision is identical to that in the TR, and the temporary revision may be removed. (2) After accomplishing the actions specified in paragraph (f)(1) of this AD, no alternative CDCCLs may be used unless the CDCCLs are part of a later revision of Section 3, "Fuel System Limitations," of Part 2, Revision 9, dated July 20, 2007, of Bombardier CL-600-2C10, CL-600-2D15 and CL-600-2D24 Maintenance Requirements Manual CSP B-053, that is approved by the Manager, New York Aircraft Certification Office (ACO), FAA, or Transport Canada Civil Aviation (or its delegated agent); or unless the CDCCLs are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (g)(1) of this AD. FAA AD Differences Note 2: This AD differs from the MCAI and/or service information as follows: No differences. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Mazdak Hobbi, Aerospace Engineer, Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7330; fax (516) 794-5531. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service. (3) Reporting Requirements: For any reporting requirement in this AD, under the provisions of the Paperwork Reduction Act, the Office of Management and Budget (OMB) has approved the information collection requirements and has assigned OMB Control Number 2120- 0056.Related Information (h) Refer to MCAI Canadian Airworthiness Directive CF-2008-07, dated January 25, 2008, and CRJ 700/900 Series Regional Jet (Bombardier) Temporary Revision 2-222, dated March 30, 2006, for related information. Material Incorporated by Reference (i) You must use CRJ 700/900 Series Regional Jet (Bombardier) Temporary Revision 2-222, dated March 30, 2006, to Section 3, "Fuel System Limitations," of Part 2 of Bombardier CL-600-2C10, CL-600- 2D15 and CL-600-2D24 Maintenance Requirements Manual CSP B-053, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada. (3) You may review copies at the FAA, TransportAirplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at 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/cfr/ibr- locations.html.