2008-10-10 R1: Fuel tank systems

2008-10-10 R1 The Boeing Company: Amendment 39-16164. Docket No. FAA-2009-1226; Directorate Identifier 2009-NM-149-AD. \n\nEffective Date \n\n\t(a) This airworthiness directive (AD) is effective January 27, 2010. \n\nAffected ADs \n\n\t(b) This AD revises AD 2008-10-10, Amendment 39-15516. \n\nApplicability \n\n\t(c) This AD applies to The Boeing Company Model 737-600, -700, - 700C, -800, and -900 series airplanes, certificated in any category, with an original standard airworthiness certificate or original export certificate of airworthiness issued before March 31, 2006. \n\n\tNote 1: Airplanes with an original standard airworthiness certificate or original export certificate of airworthiness issued on or after March 31, 2006, must already be in compliance with the airworthiness limitations specified in this AD because those limitations were applicable as part of the airworthiness certification of those airplanes. \n\n\tNote 2: This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance (AMOC) according to paragraph (m) of this AD. The request should include a description of changes to the required inspections that will ensure the continued operational safety of the airplane. \n\nUnsafe Condition \n\n\t(d) This AD results from a design review of the fuel tank systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane. \n\nCompliance \n\n\t(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. \n\nRestatement of Requirements of AD 2008-10-10, With Revised Service Information \n\nService Information Reference \n\n\t(f) The term "Revision March 2008 of the MPD,'' as used in this AD, means Boeing Temporary Revision (TR) 09-020, dated March 2008, to the Boeing 737-600/700/800/900 Maintenance Planning Data (MPD) Document, D626A001-CMR, Revision March 2008. \n\nRevision to Airworthiness Limitations (AWLs) Section \n\n\t(g) Before December 16, 2008, revise the AWLs section of the Instructions for Continued Airworthiness (ICA) by incorporating into the MPD the information in the subsections specified in paragraphs (g)(1), (g)(2), and (g)(3) of this AD; except that the initial inspection required by paragraph (h) of this AD must be done at the applicable compliance time specified in that paragraph. \n\t(1)Subsection E, "AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS,'' of Boeing TR 09-020, dated March 2008, to the Boeing 737-600/700/ 800/900 MPD Document, D626A001-CMR, Revision March 2008; or of Section 9, Revision September 2009, dated September 2009, of the Boeing 737-600/700/800/900 Maintenance Planning Data (MPD) Document, D626A001-CMR. \n\t(2) Subsection F, "PAGE FORMAT: FUEL SYSTEM AIRWORTHINESS LIMITATIONS,'' of Boeing TR 09-020, dated March 2008, to the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR, Revision March 2008; or Section 9, Revision September 2009, dated September 2009, of the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR. \n\t(3) Subsection G, "AIRWORTHINESS LIMITATIONS--FUEL SYSTEM AWLs,'' AWLs No. 28-AWL-01 through No. 28-AWL-22 inclusive, of Boeing TR 09-020, dated March 2008, to the Boeing 737-600/700/800/ 900 MPD Document, D626A001-CMR, Revision March 2008; or Section 9, Revision September 2009, dated September 2009, of the Boeing 737- 600/700/800/900 MPDDocument, D626A001-CMR. As an optional action, AWLs No. 28-AWL-23 and No. 28-AWL-24, as identified in Subsection G of Boeing TR 09-020, dated March 2008, to the Boeing 737-600/700/ 800/900 MPD Document, D626A001-CMR, Revision March 2008; or Section 9, Revision September 2009, dated September 2009, of the Boeing 737- 600/700/800/900 MPD Document, D626A001-CMR; also may be incorporated into the AWLs section of the ICA. \n\nInitial Inspection and Repair if Necessary \n\n\t(h) At the later of the compliance times specified in paragraphs (h)(1) and (h)(2) of this AD, do a special detailed inspection of the lightning shield to ground termination on the out-of-tank fuel quantity indication system (FQIS) wiring to verify functional integrity, in accordance with AWL No. 28-AWL-03 of Subsection G of Boeing TR 09-020, dated March 2008, to the Boeing 737-600/700/800/ 900 MPD Document, D626A001-CMR, Revision March 2008; or Section 9, Revision September 2009, dated September 2009, of the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR. If any discrepancy is found during the inspection, repair the discrepancy before further flight in accordance with AWL No. 28-AWL-03 of Subsection G of Boeing TR 09-020, dated March 2008, to the Boeing 737-600/700/800/ 900 MPD Document, D626A001-CMR, Revision March 2008; or Section 9, Revision September 2009, dated September 2009, of the Boeing 737- 600/700/800/900 MPD Document, D626A001-CMR. Accomplishing AWL No. 28-AWL-03 as part of an FAA-approved maintenance program before the applicable compliance time specified in paragraph (h)(1) or (h)(2) of this AD constitutes compliance with the requirements of this paragraph. \n\n\tNote 3: For the purposes of this AD, a special detailed inspection is: "An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. The examination is likely to make extensive use of specialized inspection techniques and/or equipment. Intricate cleaning and substantial access or disassembly procedure may be required.'' \n\n\t(1) Within 120 months since the date of issuance of the original standard airworthiness certification or the date of issuance of the original export certificate of airworthiness. \n\t(2) Within 24 months after June 12, 2008 (the effective date of AD 2008-10-10). \n\nNo Alternative Inspections, Inspection Intervals, or Critical Design Configuration Control Limitations (CDCCLs) \n\n\t(i) After accomplishing the actions specified in paragraphs (g) and (h) of this AD, no alternative inspections, inspection intervals, or CDCCLs may be used unless the inspections, intervals, or CDCCLs are approved as an AMOC in accordance with the procedures specified in paragraph (m) of this AD. \n\nCredit for Actions Done According to Previous Revisions of the MPD \n\n\t(j) Actions done before June 12, 2008, in accordance with the following MPDs are acceptable for compliance with the corresponding requirements of paragraphs (g) and (h) of this AD: Section 9 of the Boeing 737-600/700/700C/700IGW/800/900 MPD Document, D626A001-CMR, Revision March 2006; Revision May 2006; Revision October 2006; Revision November 2006; or Revision November 2006 R1; or Section 9 of the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR, Revision March 2007; Revision March 2007 R1; Revision March 2007 R2; or Revision February 2008. \n\nTerminating Action for AD 2008-06-03, Amendment 39-15415 \n\n\t(k) Incorporating AWLs No. 28-AWL-21, No. 28-AWL-22, and No. 28- AWL-24 into the AWLs section of the ICA in accordance with paragraph (g) of this AD terminates the action required by paragraph (h)(1) of AD 2008-06-03. \n\nNew Information \n\nExplanation of CDCCL Requirements \n\n\tNote 4: 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 AWLs, as required by paragraph (g) of this AD, do not need to be reworked in accordance withthe CDCCLs. However, once the AWLs have been revised, future maintenance actions on these components must be done in accordance with the CDCCLs. \n\nCredit for Actions Done According to Previous Revisions of the MPD \n\n\t(l) Actions done before the effective date of this AD, in accordance with the following MPDs are acceptable for compliance with the corresponding requirements of paragraphs (g) and (h) of this AD: Section 9 of the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR, Revision March 2008; Revision April 2008; Revision June 2008; Revision February 2009; Revision March 2009; or Revision August 2009. \n\nAlternative Methods of Compliance (AMOCs) \n\n\t(m)(1) The Manager, Seattle Aircraft Certification Office (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: Thomas Thorson, Aerospace Engineer, Propulsion Branch, ANM- 140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6508; fax (425) 917-6590. Or, e-mail information to 9-ANM-Seattle-ACO-AMOC- [email protected]. \n\t(2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. 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 FSDO. The AMOC approval letter must specifically reference this AD. \n\t(3) AMOCs approved previously in accordance with AD 2008-10-10 are approved as AMOCs for the corresponding provisions of this AD. \n\nMaterial Incorporated by Reference \n\n\t(n) You must use Boeing Temporary Revision 09-020, dated March 2008, to the Boeing 737-600/700/800/900 Maintenance Planning Data (MPD) Document D626A001-CMR; or Section 9, Revision September 2009, dated September 2009, of the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR; to do the actions required by this AD, unless the AD specifies otherwise. \n\t(1) The Director of the Federal Register approved the incorporation by reference of Section 9, Revision September 2009, dated September 2009, of the Boeing 737-600/700/800/900 MPD Document, D626A001-CMR, under 5 U.S.C. 552(a) and 1 CFR part 51. \n\t(2) The Director of the Federal Register previously approved the incorporation by reference of Boeing Temporary Revision 09-020, dated March 2008, to the Boeing 737-600/700/800/900 Maintenance Planning Data (MPD) Document, D626A001-CMR, on June 12, 2008 (73 FR 25986, May 8, 2008). \n\t(3) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-544-5000, extension 1; fax 206-766-5680; e-mail [email protected]; Internet https://www.myboeingfleet.com. \n\t(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. \n\t(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.