Airworthiness directives › 2017-12-14
AD 2017-12-14 Airworthiness Directives; The Boeing Company Airplanes
Models named: 757-200, -200PF series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
(1) This AD applies to The Boeing Company Model 757-200 and -200PF series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 757-53A0103, dated June 22, 2016. (2) Installation of Supplemental Type Certificate (STC) ST01518SE ( http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgSTC.nsf/0/38B606833BBD98B386257FAA00602538?OpenDocument&Highlight=st01518se ) does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01518SE is installed, a “change in product” alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Before the accumulation of 28,000 total flight cycles, or within 3,000 flight cycles after the effective date of this AD, whichever occurs later, do an HFEC inspection of the frame webs for any crack in any open coordinating holes, tooling holes, and insulation blanket attachment holes, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 757-53A0103, dated June 22, 2016. If any cracking is found, repair before further flight using a method approved in accordance with the procedures specified in paragraph (i) of this AD. Repeat the inspection at intervals not to exceed 12,000 flight cycles.
Unsafe condition
This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the frame webs between stringers S-20 and S-25 on the left side and right side, from station (STA) 440 to STA 820 and from STA 1300 to STA 1701, are subject to widespread fatigue damage (WFD). We are issuing this AD to prevent fatigue cracking that could result in reduced structural integrity of the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1