14 CFR 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

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AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Mo

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

removing and repairing the sealant at the fouf lower comers of the wing center section INI(4';

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and the four lower t-chord segment gaps on each side of the wing center section and at! er 2/,tit0

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specified actions. This proposed AD results from reports of fuel leakage from the cente AASm-/Do5

tank on 9 airplanes. We are proposing this AD to detect and correct improperly applied I~I~~~./.'~

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sealant. This condition, ifnot cOiTectcd, could result in fuiliug ay disbanding and ' ;1/7--/.,

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displacing, which can result in fuel leaks of up to 10 gallons per minute. During flight, _ '7

the fuel would leak into areas which have been designed to accommodate fuel leakage, INITlC~~

but on the ground, if the fuel leakage is not contained, it could result in pooling. This D3/

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poohng combined with an ignition source could result in a fire.

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 of the 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 of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Mo

777-200, -200LR, -300, and -300ER series airplanes. This proposed AD would require

removing and repairing the sealant at the four lower comers of the 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 of fuel leakage from the cente ANm- fo05

tank on 9 airplanes. We are proposing this AD to detect and correct improperly applied

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sealant. This condition, if not corrected, could result in fiHli]:lg &y disbonding and

of Sf"{1I1f

displacing, which can result in fuel leaks of up to 10 gallons per minute. During flight, Il{)UnN~SYM~L0 l

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

but on the ground, if the fuel leakage is not contained, it could result in pooling. This

pooling combined with an ignition source could result in a fire.

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 of the following methods:

• Federal eRulemaking Portal: Go to http://w\\'W.regulations.gov. Follow the

instructions for submitting comments.

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