Airworthiness directives › 2016-04-02
AD 2016-04-02 Airworthiness Directives; The Boeing Company Airplanes
Models named: 747-200C, -200F, -400, -400D, -400F series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 747-200C, -200F, -400, -400D, and -400F series airplanes; certificated in any category; as identified in Boeing Alert Service Bulletin 747-53A2499, Revision 3, dated July 15, 2014.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
At the applicable time specified in Table 1 and Table 3 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2499, Revision 3, dated July 15, 2014, except as required by paragraph (j)(1) of this AD: Do eddy current inspections for cracks in the skin of the lap joints, and do all applicable repairs, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2499, Revision 3, dated July 15, 2014, except as required by paragraph (j)(2) of this AD. Do all applicable repairs before further flight. Repeat the applicable inspections thereafter at intervals not to exceed those specified in Table 1 and Table 3 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2499, Revision 3, dated July 15, 2014.
Unsafe condition
This AD was prompted by an evaluation by the design approval holder indicating that certain lap joints are subject to widespread fatigue damage. We are issuing this AD to detect and correct fatigue cracking in certain lap joints, which could result in rapid depressurization and consequent reduced structural integrity of the airplane.
Affected ADs
This AD replaces AD 2010-26-10, Amendment 39-16549 (75 FR 81427, December 28, 2010).
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