Airworthiness directives › 2018-10-12
AD 2018-10-12 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737-100, -200, -200C, -300, -400, -500 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 737-100, -200, -200C, -300, -400, and -500 series airplanes, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes identified as Group 1 in Boeing Alert Requirements Bulletin 737-57A1339 RB, dated April 16, 2018: Within 120 days after the effective date of this AD, inspect the airplane and do all applicable corrective actions using a method approved in accordance with the procedures specified in paragraph (k) of this AD.
Unsafe condition
This AD was prompted by a report of cracks in the left-side and right-side keel beam upper chords and aft vertical stiffeners. Cracks in the aft vertical stiffeners may lead to the inability of the keel beam structure to sustain required flight loads, which could adversely affect the structural integrity of the airplane.
Affected ADs
None.
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