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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

(Docket No. FAA-2010-1 I I I I; Directorate Identifier 2009-NM-234-AD)

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Ain\'orthincss Directives; The Boeing Company Model 757 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for all Model 75 OU NG H

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series airplanes. This proposed AD would require a detailed inspection of the inboard an ~lllSJSJG

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downstop assembly nuts of slat nwnbers 1 through 10, excluding the outboard track of

outboard main track downstop assemblies and a torque application to the main track

slats 1 and 10, a detailed inspection of all slat track housings, and related corrective

actions if necessary. This proposed AD results from reports of fuel leaking from the fro

spar of the wing through the slat track housing. We are proposing this AD to detect and

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correct incorrectly installed main track downstop assemblies, which, when the slat is

retracted, could cause a puncture in the slat track housing leading to a fuel leak and

potential fire.

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DATES: We must receive comments on this proposed AD by [INSERT DATE 45

DA YS 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://wvifw.regulations.gov. Follow the

instructions for submitting comments .

• Fax: 202-493-2251.

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14910-13-PI

DEPARTMENT OF TR>\NSPORTATION

14CFR Part 39

Federal Aviation Administration

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(Docket No. FAA-2010-1 I I I I; Directorate Identifier 2009-NM-234-AD)

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ROUTING SYl-lBOl Ainvorthiness Directives; The Boeing Company Model 757 Airplanes

ADDRESSES: You may send comments by any of the following methods:

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

DATES: We must receive comments on this proposed AD by [INSERT DATE 4S

• Fax: 202-493-2251.

• Federal eRulemaking Portal: Go to hnp:II\.\;ww.re~mlations.gov. Follow the

retracted, could cause a puncture in the slat track housing leading to a fuel leak and

correct incorrectly installed main track downstop assemblies, which, when the slat is

spar of the wing through the slat track housing. We are proposing this AD to detect and

actions if necessary. This proposed AD results from reports of fuel leaking [Tom the fro

instructions for submitting comments .

AGENCY: Federal Aviation Administration (FAA), DOT. #IS~fJl'l'llt""

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ACTION: Notice of proposed rulemaking (NPRM). 1S,

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for all Model 75 Ole; M

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senes alrp alles. ISpropose WOll reqUirea eta e mspeClion0 t e In oaf an ~';lG ._

outboard main track downstop assemblies and a torque application to the main track [I.tE i'd 1..1_

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downstop assembly nuts of slat numbers I through 10, excluding the outboard track of s.....-

slats I and 10, a detailed inspection of all slat track housings, and related corrective

potential tire. (