2006-22-03: Aft pressure bulkhead

2006-22-03 Airbus: Amendment 39-14800. Docket No. FAA-2005-21343; Directorate Identifier 2004-NM-117-AD. Effective Date (a) This AD becomes effective December 1, 2006. Affected ADs (b) None. Applicability (c) This AD applies to Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model C4-605R Variant F airplanes (collectively called A300-600 series airplanes); and Model A310 series airplanes; certificated in any category; except those modified in production by Airbus Modification 6788. Unsafe Condition (d) This AD results from severe corrosion found in the lower rim area of the aft pressure bulkhead during routine maintenance of an airplane. We are issuing this AD to prevent corrosion on the inner rim angle and cleat profile splice of the aft pressure bulkhead, which could result in the loss of airplane structural integrity. Compliance (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. Service Bulletin References (f) The term "service bulletin," as used in this AD, means the Accomplishment Instructions of the following service bulletins listed in Table 1 of this AD, as applicable: Table 1 Service Bulletin References Models Requirement Airbus Service Bulletin A300-600 series airplanes Paragraph (g) of this AD A300-53-6017, Revision 02, dated February 25, 2004 Paragraph (h) of this AD A300-53-6006, Revision 3, dated March 24, 1989 A310 series airplanes Paragraph (g) of this AD A310-53-2036, Revision 02, dated February 25, 2004 Paragraph (h) of this AD A310-53-2025, Revision 06, dated August 3, 2006 Modification To Improve Corrosion Protection and Drainage (g) Within 60 months after the effective date of this AD, modify the aft pressure bulkhead for improved corrosion protection and drainage by doing all of the actions specified in the Accomplishment Instructions of the applicable service bulletin. Where the service bulletin specifies to use sealant PR-2752 (consumable material list (CML) 09-035), sealant MC-650B (CML 09-056) may be used. Concurrent Modification To Improve Attachment Angles (h) Before or concurrently with accomplishing the modification required by paragraph (g) of this AD, modify the aft pressure bulkhead to improve the fatigue life of the attachment angles at frame (FR) 80/82 by doing all of the actions specified in the Accomplishment Instructions of the applicable service bulletin. Where the service bulletin specifies doing a visual inspection around the entire circumference between FR80/82 and the aft pressure bulkhead for damaged filler, do a general visual inspection. Note 1: For the purposes of this AD, a general visual inspection is: "A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked." Credit for Concurrent Actions (i) For Model A310 series airplanes, accomplishment of the actions specified in paragraph A.2. of AD 88-06-03, amendment 39- 5871 (53 FR 7730, March 10, 1988), is considered acceptable for compliance with the requirements of paragraph (h) of this AD. Credit for Previous Service Bulletins (j) Actions done before the effective date of this AD in accordance with Airbus Service Bulletin A310-53-2036, Revision 01, dated October 9, 2003 (for Model A310 series airplanes), are acceptable for compliance with the requirements of paragraph (g) of this AD. (k) Actions done before the effective date of this AD in accordance with Airbus Service Bulletin A310-53-2025, Revision 5, dated March 24, 1989 (for Model A310 series airplanes), are acceptable for compliance with the requirements of paragraph (h) of this AD. Alternative Methods of Compliance (AMOCs) (l)(1) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) Before using any AMOC approved in accordance with 14 CFR 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (m) French airworthiness directive F-2004-004, dated January 7, 2004, also addresses the subject of this AD. Material Incorporated by Reference (n) You must use the applicable service information identified in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. Table 2 Material Incorporated by Reference Service Bulletin Revision Level Date Airbus Service Bulletin A300-53-6006 3 March 24, 1989 Airbus Service Bulletin A300-53-6017 02 February 25, 2004 Airbus Service Bulletin A310-53-2025 06 August 3, 2006 Airbus Service Bulletin A310-53-2036 02 February 25, 2004 Airbus Service Bulletin, A300-53-6006, Revision 3, dated March 24, 1989, contains the following effective pages: Revision Level Date Page Number Shown on Page Shown on Page 1, 29, 47, 48 3 March 24, 1989 2-28, 30-46, 2 August 11, 1988 49-52 The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., Room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov ; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.