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 D09002ee1c7fc2acd D09002ee1c7fc2b56 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 superseding an existing airworthiness directive (AD) for certain The Boeing Company Model 737-100 and -200 series airplanes. The existing AD currently requires various inspections for cracks in the outboard chord of the frame at body station (BS) 727 and in the outboard chord of stringer (S) 18A, and repair or replacement of cracked parts. This new AD adds airplanes to the applicability statement in the existing AD and adds inspections for cracks in the BS 727 frame outboard chords and the radius of the auxiliary chord, for certain airplanes. This new AD also removes the inspections of the outboard chord of S-18A required by the existing AD. This AD was prompted by several reports of fatigue cracking in the frame outboard chord at BS 727 and in the radius of the auxiliary chord on airplanes that were not affected by the existing AD. We are issuing this AD to detect and correct fatigue cracking of the outboard and auxiliary chords, which could result in reduced structural integrity of the outboard chord and consequent rapid decompression of the airplane. 77 FR 69747 https://www.govinfo.gov/app/details/FR-2012-11-21/2012-27636 2012-27636 fr21no12-7 RIN 2120-AA64 4910-13-P Docket No. FAA-2011-0722 Directorate Identifier 2010-NM-262-AD Amendment 39-17260 AD 2012-23-04 https://www.govinfo.gov/app/details/FR-2012-11-21/2012-27636 https://www.govinfo.gov/content/pkg/FR-2012-11-21/html/2012-27636.htm https://www.govinfo.gov/content/pkg/FR-2012-11-21/pdf/2012-27636.pdf Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety 8 p. 69747 69754 77 FR 69747 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; The Boeing Company Model Airplanes; Federal Register Vol. 77, Issue RULE 2012-27636 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2012-12-26 Docket No. FAA-2011-0722 Directorate Identifier 2010-NM-262-AD Amendment 39-17260 AD 2012-23-04 4910-13-P 2012-27636 Final rule.

We are superseding an existing airworthiness directive (AD) for certain The Boeing Company Model 737-100 and -200 series airplanes. The existing AD currently requires various inspections for cracks in the outboard chord of the frame at body station (BS) 727 and in the outboard chord of stringer (S) 18A, and repair or replacement of cracked parts. This new AD adds airplanes to the applicability statement in the existing AD and adds inspections for cracks in the BS 727 frame outboard chords and the radius of the auxiliary chord, for certain airplanes. This new AD also removes the inspections of the outboard chord of S-18A required by the existing AD. This AD was prompted by several reports of fatigue cracking in the frame outboard chord at BS 727 and in the radius of the auxiliary chord on airplanes that were not affected by the existing AD. We are issuing this AD to detect and correct fatigue cracking of the outboard and auxiliary chords, which could result in reduced structural integrity of the outboard chord and consequent rapid decompression of the airplane.

This AD is effective December 26, 2012. Alan Pohl, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, Washington 98057-3356; phone (425) 917- 6450; fax (425) 917-6590; email alan.pohl@faa.gov. Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety Airworthiness Directives: The Boeing Company Model Airplanes , 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov alan.pohl@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