14910-I3-P) DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 14CFR Part 39 IDocket No. FAA-2009-0608; Directorate Identifier 2008-NM-215-AD; Amendme 39:

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## 707'D; RIN 2120-AA64 Airworthiness Directives; Boeing 747-200C and -200F Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting anew airworthiness directive (AD) for all Boeing 747-200C and -200F series airplanes. This AD requires ahigh frequency eddy current (HFEC) inspection forcracks ofcenain fastener holes, and corrective action ifnecessa Thjs.AD also requires repetitive replacements ofthe upper chords, straps (or angles), a radius fillers ofcertain upper deck floor beams, and, for any replacement that is done, detailed and open-hole HFEC inspections forcracks ofthe modified upper deck Ooor beams, and cOITectiveactions ifnecessary. This AD results from arepon from the manufacturer that the accomplishment ofcCltain existing inspections, repairs, and ~lL

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modifications is not adequate to ensure the structural integrity of the affected 7075 sed aluminum alloy upper deck floor beam upper chords on airplanes that have exceeded certain thresholds. We are issuing this AD to prevent cracking of tile upper chords and straps (or angles) oflhe Ooorbeams, which could lead to failure ofthe noor beams and consequent loss ofcontrollability. rapid decompression, and loss of structural integrity the airplane. DATES: This AD is effective [insert dale 35 days after date ofpublication inthe FEDERAL REGISTER]. INIII~I"',I(, 5 An
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DEPARTMENT OF TRANSPORTA nON Federal Aviation Administration 14CFR Part 39 (Docket No. FAA-2009-0608; Directorate Identifier 2008-NM-215-ADj Amcndmen 39-'*; AD **) RIN 2120-AA64 Ainvorthiness Directives; Boeing 747-200C and -200F Series Airplanes AGENCY: Federal Aviation Administration (FAA). DOT. ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for all Boeing 747-200C and -lOOF series airplanes. This AD requires ahigh frequency eddy current inspection forcracks ofcertain fastener holes, and corrective action ifnecessary. This AD also requires repetitive repjacements ofthe upper chords, straps (or angles), and radius fillers ofcertain upper deck floor beams, and. for any replacement that is done. detailed and open-hole HFEC inspections for cracks ofthe modified upper deck floor beams, and corrective actions ifnecessary. This AD results from areport from the manufacturer that the accomplishment ofcertain existing inspections, repairs, and modifications is not adequate to ensure the structural integrity orthe affected 7075 seric alwninum alloy upper deck floor beam upper chords on airplanes that have exceeded certain thresholds. We are issuing this AD to prevent cracking of the upper chords and straps (or angles) ofthe floor beams, which could lead to failure ofthe noor beams and consequem loss or controllability, rapid decompression. and loss ofstructural integrity the airplane. DATES: This AD is effective [insert date 35 days aHer date ofpublication inthe FEDERAL REGISTER]. 'lCUR~E"O'S ~OVTlNG 5¥"'BOL 

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m AD also requires repetitive replacements of the upper chords, straps (or angles), and inspection for cracks of certain fastener holes, and corrective action ifnecessary. This 747-200C and -lOOF series airplanes. This AD requires ahigh frequency eddy current

manufacturer that the accomplishment of certain existing inspections, repairs, and beams, and corrective actions ifnecessary. This AD results from a report from the detailed and open-hole HFEC inspections for cracks of the modified upper deck floor radius fillers ofcertain upper deck floor beams, and, for any replacement that is done, RIN 2I20-AA64

SUMMARY: We are adopting a new amvorthiness directive (AD) for all Boeing 14 CFR Part 39 Federal Aviation Administration

Ainvorthiness Directives; Boeing 747-200C and -lOOF Series Airplanes AGENCY: federal Aviation Administration (FAA), DOT. ACTION: Finalrule.

modifications is not adequate to ensure the structural integrity of the affected 7075 seri aluminum alloy upper deck floor beam upper chords on airplanes that have exceeded certain thresholds. We are issuing this AD to prevent cracking of the upper chords and straps (or angles) of the floor beams, which could lead to failure of the floor beams and consequent loss of controllability, rapid decompression, and loss of structural integrity the airplane. DATES: This AD is effective [insert date 35 days after date of publication in the FEDERAL REGISTER]. [Docket No. FAA-2009-0608j Directorate Identifier 2008-N"M-215-AD; Amcndme ,39-**; AD **)