Airworthiness directives › 2012-25-11
AD 2012-25-11 Airworthiness Directives; The Boeing Company Airplanes
Models named: 757-200, -200CB, -300 series, 757-200PF series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company Model 757-200, -200CB, and -300 series airplanes, certificated in any category. Model 757-200PF series airplanes are not affected by this AD.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
This paragraph restates the requirements of paragraph (g) of AD 2012-15-15, Amendment 39-17144 (77 FR 52212, August 29, 2012), with a terminating action. For airplanes having line numbers 1 through 90 inclusive: Within 500 flight cycles after May 24, 2004 (the effective date of AD 2004-09-32, Amendment 39-13622 (69 FR 25481, May 7, 2004)), or within 90 days after May 24, 2004 (the effective date of AD 2004-09-32), whichever occurs later, do the inspections of the forward upper corner of the L1 entry door cutout specified in paragraphs (g)(1), (g)(2), and (g)(3) of this AD, per Part 1 of the Work Instructions of Boeing Special Attention Service Bulletin 757-53-0089, dated March 18, 2004, until the initial inspection required by paragraph (k) of this AD has been done. Doing the repair specified in paragraph (i) or (l) of this AD, or doing the preventive modification specified in paragraph (j) of this AD, terminates the inspections required by this paragraph. (1) Do a high frequency eddy current (HFEC) inspection for cracking of the fuselage skin around the adjacent fasteners. (2) Do an HFEC inspection for cracking along the edge of the skin and bear strap. (3) Do a low frequency eddy current (LFEC) inspection for cracking of the bear strap around each fastener.
Unsafe condition
This AD was prompted by reports of cracks in the fuselage skin and bear strap at the forward upper corner of the L1 entry door cutout. We are issuing this AD to detect and correct cracking of the fuselage skin and bear strap at the forward, upper corner of the L1 entry door cutout, which could result in reduced structural integrity of the L1 entry door and consequent rapid decompression of the airplane.
Affected ADs
This AD supersedes AD 2012-15-15, Amendment 39-17144 (77 FR 52212, August 29, 2012).
Read the original on the Federal Register →
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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