<searchTitle>Airworthiness Directives; Boeing Model 707 Airplanes, and Model 720 and 720B Series Airplanes; Federal Register Vol. 74, Issue </searchTitle>
<granuleClass>RULE</granuleClass>
<accessId>E9-20838</accessId>
<agency order="1">DEPARTMENT OF TRANSPORTATION</agency>
<agency order="2">Federal Aviation Administration</agency>
<effectiveDate>2009-10-14</effectiveDate>
<departmentDoc>Docket No. FAA-2009-0476</departmentDoc>
<departmentDoc>Directorate Identifier 2008-NM-188-AD</departmentDoc>
<departmentDoc>Amendment 39-16006</departmentDoc>
<departmentDoc>AD 2009-18-10</departmentDoc>
<rin number="2120-AA64"/>
<billingCode>4910-13-P</billingCode>
<frDocNumber>E9-20838</frDocNumber>
<action>Final rule.</action>
<summary>The FAA is superseding an existing airworthiness directive (AD), which applies to certain Boeing Model 707 airplanes, and Model 720 and 720B series airplanes. The existing AD currently requires repetitive detailed inspections to detect cracks and corrosion on any existing repairs and at certain body stations (STA) of the visible surfaces of the wing to body terminal fittings including the web, flanges, and ribs; and applicable related investigative and corrective actions. This new AD retains the requirements of the existing AD and requires repetitive ultrasonic inspections to detect any stress corrosion cracks within the outboard flange of the left and right body terminal fittings at STA 820, and related investigative and corrective actions if necessary. This AD also provides an optional terminating action for the repetitive inspections. This AD also adds two airplanes to the applicability. This AD results from reports of cracks found in the wing to body terminal fittings during routine inspections. We are issuing this AD to detect and correct cracks and corrosion in the body terminal fittings above and below the floor, which could cause loss of support for the wing and could adversely affect the structural integrity of the airplane.</summary>
<dates>This AD becomes effective October 14, 2009.</dates>
<contact>Berhane Alazar, Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6577; fax (425) 917-6590.</contact>
<cfr title="14">
<part number="39"/>
<subject>Air Transportation</subject>
<subject>Aircraft</subject>
<subject>Aviation Safety</subject>
<subject>Incorporation by Reference</subject>
<subject>Safety</subject>
...</cfr>
<tocSubject1>Airworthiness Directives:</tocSubject1>
<tocDoc>Boeing Model 707 Airplanes, and Model 720 and 720B Series Airplanes
, </tocDoc>
<emailRef>9-ANM-Seattle-ACO-AMOC-Requests@faa.gov</emailRef>
<emailRef>me.boecom@boeing.com</emailRef>
<urlRef>http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html</urlRef>
<urlRef>http://www.regulations.gov</urlRef>
<urlRef>https://www.myboeingfleet.com</urlRef>