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### 11-~-0'1 14CFR Part 39 DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration

Airworthiness Directives; Boeing Model 747-200C and -200F Series Airplanes [Doc~et !'ia. FAA-2009-0684j Directorate Identifier 2008-NM-149-ADj Amendment 

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AGENCY: Federal Aviation Administration (FAA), Department ofTransportation (DOT). ACTION: Final rule. ~OllTINGSYMilOL



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ROlJ1'ING SYMOOL SUMMARY: The FAA is superseding an existing airworthiness directive (AD), which

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# ~t:~ requires repetitive inspections to find fatigue cracking inthe floor panel attachment I

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# °/10 fastener holes ofthe upper chqrd ofcertain upper deck floor beams in Section 41 (i.e., body station 520 and fOrward)! and repair ifnecessary. The existing AD also provides optional modifications, which 'extend the threshold for the initiation ofcertain repetitive "oU'n~G '''''SOL



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## 110 inspections. This new AD requires additional repetitive inspections to find fatigue RO'ITING SYMBOL cracking inthe floor panel attachment fastener holes ofthe upper chord ofcertain other upper deck floor beams in Section 41 and Section 42 (i.e., aft ofbody station 520); 

## ","'"'---- repetitive inspections to find fatigue cracking inthe penn anent fastener holes ofthe uppe OllllNGSYMOOL chord ofcertain upper deck fidor beanls in Section 41; and related investigative and l~ITIAL""G corrective actions. This new ~ also provides anew optional modification, which ",,;o'"C

---- terminates certain repetitive inlpections. This AD results from new reports ofcracking i UTlNGSY"ilOL the upper chord ofthe upper dick floor beams in Sections 41 and 42, and new analysis [NrTrAL,SISIG that shows the permanent fastener holes ofthe upper chord of certain upper deck floor I'ATE beams in Section 41 are also sbsceptible to fatigue cracking. We are issuing this AD to[491O-13-PJ

DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 14CFR Part 39 [Docket No. FAA-2009-0684j Directorate Identifier 2008-NM-149-AD; Amendment 39-**; AD 

## **1 RlN 2120-AA64 Airworthiness Directives; Boeing Model 747-200C and -2001"Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department ofTransportation (DOT). ACTION: Final rule. applies to certain Boeing Model 747-200C and -200F series airplanes. That AD currentl requires repetitive inspections to find fatigue cracking inthe floor panel attachment fastener holes ofthe upper chord ofcertain upper deck floor beams in Section 41 (i.e., body station 520 and forward), and repair 

### ifnecessary. The existing AD also provides optional modifications, which extend the threshold for the initiation ofcertain repetitive inspections. This new AD req~ires additional repetitive inspections to find fatigue cracking in the floor panel attachment fastener holes ofthe upper chord ofcertain other upper deck floor beams in Section 41 and Section 42 (i.e., aft ofbody station 520); 

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repetitive inspections to find fatigue cracking inthe permanent fastener holes of the upp 

## ." chord ofcertain upper deck floor beams in Section 41; and related investigative and corrective actions. This new AD also provides anew optional modification, which terminates certain repetitive inspections. This AD results from new reports ofcracking i the upper chord ofthe upper deck floor reams in Sections 41 and 42, and new analysis that shows the permanent fastener holes ofthe upper chord of certain upper deck floor beams in Section 41 are also susceptible to fatigue cracking. We are issuing this AD to "IT\AlSIS1G[4910-i3-P]

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR ParI 39 [Docket No. FAA-2009-0684j Directorate Identifier 2008-NM-149-AD; Amendment 39-**; AD **) R1N 2120-AA64 Airworthiness Directives; Boeing Model 747-200C and -200F Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department ofTransportation 

## (DOn ACTION: Final rule. applies to certain Boeing Model 747-200C and ~200Fseries airplanes. That AD current! requires repetitive inspections to fmd fatigue cracking inthe floor panel attacrunent fastener holes ofthe upper chord ofcertain upper deck floor beams in Section 41 (i.e., body station 520 and forward), and repair ifnecessary. The existing AD also provides optional modifications, which extend the tlueshold forthe initiation ofcertain repetitive inspections. This new AD requires additional repetitive inspections to find fatigue cracking inthe floor panel attachment fastener holes ofthe upper chord ofcertain other upper deck floor beams in Section 41 and Section 42 (i.e., aft ofbody station 520); 11-'!>-iff OUTlNG SYMlSOl 

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lilTIALS/SIG repetitive inspections to find fatigue cracking inthe permanent fastener holes ofthe upp 

## '" chord ofcertain upper deck floor beams in Section 41; and related investigative and corrective actions. This new

## AD also provides anew optional modification, which N1TlAl$/51G terminates certain repetitive inspections. This AD results from new reports ofcracking i the upper chord ofthe upper deck floor t5eamsin Sections 41 and 42, and new analysis I .-- that shows the permanent fastener holes ofthe upper chord ofcertain upper deck floor beams in Section 41 are also susceptible to fatigue cracking. We are issuing this AD to 

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