2008-09-24 R1: Fuel

2008-09-24 R1 BOMBARDIER, INC. (Formerly de Havilland, Inc.): Amendment 39-16122. Docket No. FAA-2009-1106; Directorate Identifier 2009-NM-171-AD. Effective Date (a) This airworthiness directive (AD) becomes effective December 21, 2009. Affected ADs (b) This AD revises AD 2008-09-24, Amendment 39-15505. Applicability (c) This AD applies to all Bombardier Model DHC-8-400, DHC-8- 401, and DHC-8-402 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. Revisions have been made to Part 2 "Airworthiness Limitations Items'' of the Maintenance Requirements Manual of the affected models 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. Restatement of Requirements of AD 2008-09-24, With Updated Service Information Actions and Compliance (f) Unless already done, do the following actions. (1) For all airplanes: Within 60 days after June 6, 2008 (the effective date of AD 2008-09-24), revise the ALS of the Instructions for Continued Airworthiness to incorporate the CDCCLs specified in Dash 8 Q400 (Bombardier) Temporary Revisions (TRs) ALI-55, dated April 19, 2006; ALI-56, dated April 19, 2006; and TR ALI-76, dated January 24, 2008; to Part 2, "Airworthiness Limitations Items,'' of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7. Note 1: The actions required by paragraph (f)(1) of this AD may be done by inserting a copy of the applicable TRs into the maintenance requirements manual. When the TRs have 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 applicable TRs, and the TRs may be removed. (2) After accomplishing the actions specified in paragraph (f)(1) of this AD, no alternative CDCCLs maybe used 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. New Information Explanation of CDCCL Requirements Note 2: Notwithstanding any other maintenance or operational requirements, components that have been identified as airworthy or installed on the affected airplanes before the revision of the ALS, as required by paragraph (f)(1) of this AD, do not need to be reworked in accordance with the CDCCLs. However, once the ALS has been revised, future maintenance actions on these components must be done in accordance with the CDCCLs. FAA AD Differences Note 3: 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 Aircraft Certification Office, ANE-170, 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: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York, 11590; telephone 516-228- 7300; fax 516-794-5531. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. (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 ensure 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 (44 U.S.C. 3501 et seq.), 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-2008-06, dated January 15, 2008, and the service information specified in Table 1 of this AD, for related information. Table 1--Related Service Information Dash 8 Q400 (Bombardier) TR Dated ALI-55 April 19, 2006 ALI-56 April 19, 2006 ALI-76 January 24, 2008 Material Incorporated by Reference (i) You must use the service information specified in Table 2 of this AD, as applicable, to do the actions required by this AD, unless the AD specifies otherwise. Table 2--Service Information Incorporated by Reference Dash 8 Q400 (Bombardier) TR Dated ALI-55 to Part 2, Airworthiness Limitations Items, of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7 April 19, 2006 ALI-56 to Part 2, Airworthiness Limitations Items, of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7 April 19, 2006 ALI-76 to Part 2, Airworthiness Limitations Items, of the Bombardier Dash 8 Q400 Maintenance Requirements Manual (MRM) PSM 1-84-7 January 24, 2008 (1) The Director of the Federal Register approved the incorporation by reference of Dash 8 Q400 (Bombardier) TR ALI-76, dated January 24, 2008, under 5 U.S.C. 552(a) and 1 CFR part 51. (2) The Director of the Federal Register previously approved the incorporation by reference of Dash 8 Q400 (Bombardier) TR ALI-55, dated April 19, 2006; and Dash 8 Q400 (Bombardier) TR ALI-56, dated April 19, 2006; on June 6, 2008 (73 FR 24143, May 2, 2008). (3) For service information identified in this AD, contact Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855- 7401; e-mail [email protected]; Internet http:// www.bombardier.com. (4) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221 or 425-227-1152. (5) You may also review copies of the service information that is incorporated by reference 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/code_of_federal_regulations/ibr_locations.html.