United States Government Publishing Office publisher pbl distributor dst United States National Archives and Records Administration Office of the Federal Register author aut Government Organization text government publication eng FR Regulatory Information 2012_register executive 2012-11-21 article Rules and Regulations D09002ee1c7fc2aca D09002ee1c7fc2b53 United States Department of Transportation originator org United States Government Agency or Subagency United States Federal Aviation Administration originator org United States Government Agency or Subagency We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400, -400D, and -400F series airplanes. This AD was prompted by reports of crown frame web cracking at left buttock line (LBL) 15.0, station (STA) 320. This AD requires measuring the web at STA 320 and, depending on findings, various inspections for cracks and missing fasteners, web and fastener replacement, and related investigative and corrective actions if necessary. We are issuing this AD to prevent complete fracture of the crown frame assembly, and consequent damage to the skin and in-flight decompression of the airplane. 77 FR 69739 https://www.govinfo.gov/app/details/FR-2012-11-21/2012-27637 2012-27637 fr21no12-4 RIN 2120-AA64 4910-13-P Docket No. FAA-2012-0498 Directorate Identifier 2011-NM-212-AD Amendment 39-17238 AD 2012-22-02 https://www.govinfo.gov/app/details/FR-2012-11-21/2012-27637 https://www.govinfo.gov/content/pkg/FR-2012-11-21/html/2012-27637.htm https://www.govinfo.gov/content/pkg/FR-2012-11-21/pdf/2012-27637.pdf Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety 4 p. 69739 69742 77 FR 69739 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company Airplanes; Federal Register Vol. 77, Issue RULE 2012-27637 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2012-12-26 Docket No. FAA-2012-0498 Directorate Identifier 2011-NM-212-AD Amendment 39-17238 AD 2012-22-02 4910-13-P 2012-27637 Final rule.

We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-400, -400D, and -400F series airplanes. This AD was prompted by reports of crown frame web cracking at left buttock line (LBL) 15.0, station (STA) 320. This AD requires measuring the web at STA 320 and, depending on findings, various inspections for cracks and missing fasteners, web and fastener replacement, and related investigative and corrective actions if necessary. We are issuing this AD to prevent complete fracture of the crown frame assembly, and consequent damage to the skin and in-flight decompression of the airplane.

This AD is effective December 26, 2012. Bill Ashforth, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: 425-917- 6432; fax: 425-917-6590; email: Bill.Ashforth@faa.gov. Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety Airworthiness Directives: The Boeing Company Airplanes , 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov Bill.Ashforth@faa.gov http://www.archives.gov/federal-register/cfr/ibr-locations.html http://www.regulations.gov https://www.myboeingfleet.com Vol. 77, no. 225 Office of the Federal Register, National Archives and Records Administration 2012-11-21 continuing daily deposited born digital 380 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2012-11-21 P0b002ee183826e41 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr21no12 https://www.govinfo.gov/app/details/FR-2012-11-21 https://www.govinfo.gov/content/pkg/FR-2012-11-21/pdf/FR-2012-11-21.pdf https://www.govinfo.gov/content/pkg/FR-2012-11-21/xml/FR-2012-11-21.xml fdlp 69733 70103 DGPO 2012-11-21 2024-06-03 FR-2012-11-21 machine generated eng FR FR-2012-11-21 77 225