Airworthiness directives › 2014-15-06
AD 2014-15-06 Airworthiness Directives; The Boeing Company Airplanes
Models named: 747-100B SUD, 747-200B, 747-300, 747-400, 747-400D series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 747-100B SUD, 747-200B, 747-300, 747-400, and 747-400D series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 747-53A2866, dated December 4, 2013.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes identified as Group 1, Configuration 2; and Group 2; in Boeing Alert Service Bulletin 747-53A2866, dated December 4, 2013: Before the accumulation of 10,000 flight cycles after conversion to special freighter or Boeing converted freighter configuration, or within 2,000 flight cycles after the effective date of this AD, whichever occurs later, do the actions specified in paragraph (g)(1) or (g)(2) of this AD, and do all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2866, dated December 4, 2013, except as provided by paragraph (h) of this AD. Do all applicable related investigative and corrective actions before further flight. Repeat the inspection of the forward and aft tension tie channels thereafter at the applicable time and intervals specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2866, dated December 4, 2013. (1) At each tension tie station from 880 to 1100: Do a detailed inspection for cracks in the forward and aft tension tie channels. (2) At each tension tie station from 880 to 1100: Do a detailed inspection for cracks in the forward and aft tension tie channels, and do a surface high frequency eddy current (HFEC) inspection for cracks around fasteners in the tension tie channels.
Unsafe condition
This AD was prompted by an evaluation by the design approval holder (DAH) indicating that the upper deck tension ties are subject to widespread fatigue damage (WFD). We are issuing this AD to detect and correct fatigue cracking of the upper deck tension ties. Severed or disconnected tension ties at multiple locations could result in rapid decompression and loss of 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