14CFR Part 39 14910-13-P)

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration



# 031~ IDocket No. FAA-2010-++++; Directorate Identifier 2009-NM-267-ADI RJN 2120-AA64 Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -30GER Series Airplanes ONC\!R"I;NcP.' R[}UT'NG SYMBOL

AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mo 

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SYMBOL 777-200, -200LR, -300, and -30GER series airplanes. This proposed AD would require 

## ttmo removing and repairing the sealant atthe fouf lower comers ofthe wing center section INI(4'; l_. A OATE and the four lower t-chord segment gaps on each side ofthe wing center section and 

### at! er 2/,tit0 ROUTI~GSYM[<OL specified actions. This proposed AD results from reports offuel leakage from the cente AASm-/Do5 tank on 9 airplanes. We are proposing this AD to detect and correct improperly applied I~I~~~./. '~ L,f~ 0'7 sealant. This condition, ifnot cOiTectcd,could result infuiliug ay disbanding and ' 

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ct se,,,(Q1 t ROUTINe;.',"MIlOI, displacing, which can result in fuel leaks ofup to 10gallons per minute. During flight,

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# '7 the fuel would leak into areas which have been designed to accommodate fuel leakage,

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but on the ground, ifthe fuel leakage isnot contained, itcould result in pooling. This D

# 3/lf / l) poohng combined with an ignition source could result inafire. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods:

• Federal eRulemaking Portal: Go to http://www.regulations.go\'. Follow t instructions for submitting comments. 

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[4910-I3-P

DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-20IO-++++; Directorate Identifier 2009-NM-267-AD] RlN 2120-AA64 Airwortbiness Directives; The Boeing Company Model 777-200, -200LR, -300, an -300ER Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) forcertain Mo 777-200, -200LR, -300, and -300ER series airplanes. This proposed AD would require removing andrepairing the sealant atthe fourlower comers ofthe wing center section and the four lower t-chord segment gaps on each side ofthe wing center section and ot er lITlNG SYMBOL specified actions. This proposed AD results from reports offuel leakage from the cente 

### ANm- fo05 tank on 9airplanes. We are proposing this AD to detect and correct improperly applied {~< sealant. This condition, ifnot corrected, could result in fiHli]:lg &y disbonding and 

### of Sf"{1I1f displacing, which can result in fuel leaks ofupto 10gallons per minute. During flight, Il{)UnN~SYM~L 

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## l the fuelwould leak into areas which have been designed to accommodate fuel leakage, but on the ground, ifthe fuel leakage isnot contained, itcould result inpooling. This pooling combined with an ignition source could result in afire. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods:

• Federal eRulemaking Portal: Go to http://w\\'W.regulations.gov. Follow the instructions for submitting comments. ROUfING SYMBOL

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