Airworthiness directives › 2015-13-06
AD 2015-13-06 Airworthiness Directives; The Boeing Company Airplanes
Models named: 747-400, -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 747-400 and -400F series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 747-53A2860, Revision 1, dated March 18, 2014.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
At the applicable time specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2860, Revision 1, dated March 18, 2014: Do surface high frequency eddy current (HFEC) inspections for cracking of the left and right longeron extension fittings, and all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2860, Revision 1, dated March 18, 2014, except as required by paragraph (k)(2) of this AD. Do all applicable corrective actions at the applicable time specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2860, Revision 1, dated March 18, 2014. If no cracking is found, repeat the inspection thereafter at the intervals specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2860, Revision 1, dated March 18, 2014, until a terminating action specified in paragraph (h) of this AD is done.
Unsafe condition
This AD was prompted by reports of cracking in the outboard flange of the longeron extension fittings, and our determination that more work is necessary on airplanes on which a permanent repair, longeron extension fitting replacement, or modification was accomplished, as required by AD 2013-14-05, Amendment 39-17510 (78 FR 43763, July 22, 2013). We are issuing this AD to detect and correct cracks in the longeron extension fittings, which can become large and adversely affect the structural integrity of the airplane.
Affected ADs
This AD replaces AD 2013-14-05, Amendment 39-17510 (78 FR 43763, July 22, 2013).
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