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[Federal Register: September 27, 2005 (Volume 70, Number 186)] [Rules and Regulations] [Page 56361-56365] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr27se05-8] ––––––––––––––––––––––––––––––––––– DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2005-18788; Directorate Identifier 2003-NM-203-AD; Amendment 39-14296; AD2005-20-03] RIN 2120-AA64 Airworthiness Directives; Boeing Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. ––––––––––––––––––––––––––––––––––– SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737-100, -200, -200C, -300, -400, and -500 seriesairplanes. This AD requires repetitive inspections of the intercostal webs, attachment clips, and stringer splice channels for cracks; and corrective action if necessary. This AD is prompted by reports of fatigue cracks on several Boeing Model 737-200 series airplanes. We are issuing this AD to detect and correct fatigue cracking of the intercostals on the forward and aft sides of the forwardentry door, which could result in loss of the forward entry door and rapid decompression of the airplane. DATES: This AD becomes effective November 1, 2005. The incorporation by reference of a certain publication listed in the AD is approved by the Director of the Federal Register as of November 1, 2005. ADDRESSES: For service information identified in this AD, contact Boeing Commercial Airplanes,P.O. Box 3707, Seattle, Washington 98124-2207. Docket: The AD docket contains the proposed AD, comments, and any final disposition. You can examine the AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647-5227) islocated on the plaza level of the Nassif Building at the U.S. Department of Transportation, 400 Seventh Street, SW., room PL-401, Washington, DC. This docket number is FAA-2005-18788; the directorate identifier for this docket is 2003-NM-203-AD.

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FOR FURTHER INFORMATION CONTACT: Howard Hall, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 LindAvenue, SW., Renton, Washington 98055-4056; telephone (425) 917-6430; fax (425) 917-6590. SUPPLEMENTARY INFORMATION: The FAA proposed to amend 14 CFR part 39 with an AD for certain Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. That action, published in the Federal Register on August 6, 2004 (69 FR 47808), proposed to require repetitive inspections of the intercostal webs,attachment clips, and stringer splice channels for cracks; and corrective action if necessary. Comments We provided the public the opportunity to participate in the development of this AD. We have considered the comments that have been submitted on the proposed AD. Qualified Support for the Proposed AD One commenter, an operator, stated that the proposed AD is acceptable provided that the servicebulletin referenced in the proposed AD is corrected to reflect the proper work instructions and to reference accurate figures for accomplishment. The FAA cannot respond to the generality of the commenter's statement. However, other commenters have requested clarification on certain aspects of the work instructions and requested certain revision of the ''Costs of Compliance'' section of this AD. Thosecomments are specified and responded to in the appropriate paragraphs below. Request for Clarification in Paragraph (k) of the Proposed AD Two commenters request that paragraph (k) be revised to clarify that the reference to using Figure 201 instead of Figure 202 of the service bulletin only applies to Model 737-400 series airplanes. We agree that paragraph (k) of the AD should be clarified and...