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14 CFR 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 \h;,41 .7 ') e,::,,~,

39

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RIN 2120-AA64

AGENCY: Federal Aviation Administration (FAA), Department of Transportation

(DOT).

ACTION: Final rule.

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SUMMARY: The FAA is superseding an existing airworthiness directive (AD), which - to,

applies to certain Boeing Model 747-200C and -200F series airplanes. That AD currentl ': ~t:~

requires repetitive inspections to find fatigue cracking in the floor panel attachment IA1'":3/, °/10

fastener holes of the upper chqrd of certain upper deck floor beams in Section 41 (i.e.,

body station 520 and fOrward)! and repair if necessary. The existing AD also provides

optional modifications, which 'extend the threshold for the initiation of certain repetitive

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inspections. This new AD requires additional repetitive inspections to find fatigue RO'ITING SYMBOL

cracking in the floor panel attachment fastener holes of the upper chord of certain other

upper deck floor beams in Section 41 and Section 42 (i.e., aft of body station 520); ","'"'----

repetitive inspections to find fatigue cracking in the penn anent fastener holes of the uppe OllllNGSYMOOL

chord of certain upper deck fidor beanls in Section 41; and related investigative and l~ITIAL""G

corrective actions. This new ~ also provides a new optional modification, which ",,;o'"C ----

terminates certain repetitive inlpections. This AD results from new reports of cracking i UTlNGSY"ilOL

the upper chord of the upper dick floor beams in Sections 41 and 42, and new analysis [NrTrAL,SISIG

that shows the permanent fastener holes of the 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

14 CFR 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 of Transportation

(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 in the floor panel attachment

fastener holes of the upper chord of certain upper deck floor beams in Section 41 (i.e.,

body station 520 and forward), and repair if necessary. The existing AD also provides

optional modifications, which extend the threshold for the initiation of certain repetitive

inspections. This new AD req~ires additional repetitive inspections to find fatigue

cracking in the floor panel attachment fastener holes of the upper chord of certain other

upper deck floor beams in Section 41 and Section 42 (i.e., aft of body station 520);

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repetitive inspections to find fatigue cracking in the permanent fastener holes of the upp ."

chord of certain upper deck floor beams in Section 41; and related investigative and

corrective actions. This new AD also provides a new optional modification, which

terminates certain repetitive inspections. This AD results from new reports of cracking i

the upper chord of the upper deck floor reams in Sections 41 and 42, and new analysis

that shows the permanent fastener holes of the 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 of Transportation

(DOn

ACTION: Final rule.

applies to certain Boeing Model 747-200C and ~200F series airplanes. That AD current!

requires repetitive inspections to fmd fatigue cracking in the floor panel attacrunent

fastener holes of the upper chord of certain upper deck floor beams in Section 41 (i.e.,

body station 520 and forward), and repair if necessary. The existing AD also provides

optional modifications, which extend the tlueshold for the initiation of certain repetitive

inspections. This new AD requires additional repetitive inspections to find fatigue

cracking in the floor panel attachment fastener holes of the upper chord of certain other

upper deck floor beams in Section 41 and Section 42 (i.e., aft of body station 520);

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

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chord of certain upper deck floor beams in Section 41; and related investigative and

corrective actions. This new AD also provides a new optional modification, which

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terminates certain repetitive inspections. This AD results from new reports of cracking i

the upper chord of the upper deck floor t5eams in Sections 41 and 42, and new analysis

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that shows the permanent fastener holes of the upper chord of certain upper deck floor

beams in Section 41 are also susceptible to fatigue cracking. We are issuing this AD to

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