DEPARTMENT OF TRANSPORTA nON

14910-I3-P]

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Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0669; Directorate Identifier 2007-NM-350-AD; Amendmel I

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39-**;AD**) 2-JID<),-,)'6 ,~M-Io,

RlN 2120-AA64

Airworthiness Directivesj Boeing Model 737-600, -700, and -800 Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT. ItM loo

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ACTION: Fillal ru1c. }~h~~\'\v

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain Boeing I;' 23 (0-1

Model 737-600, -700, and -800 senes airplanes. This AD requires an inspection orthe

free flange, vertical web, and radius between the free flange and veliical web orthe lover

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stringers oft-he wing center section for drill starts, and applicable related investigatIve

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and con>ective actions. This AD results from drill starts being found on the free flange r

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the lower stringers of the wing center section during a quality assurance inspection at t1e

final assembly plant. We are issuing this AD to prevent cracks from propagating from

drill starts in the free flange, vertical web, and radius between the fi'ee flange and vertic "1L)lLNG'\''''''''.

web orthe lower stringers of the wi.ng center section lower stnngers, which could caus '~',"",,"G

loss ofstructuralll1tegrity of the wing center section and may result in a fuel leak.

DATES: This AD is effective [insert date 35 days after date of pub licati Oil in the

FEDERAL REGISTER],

The Director of the Federal Register approved the incorporation by reference 0

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certain j}ublication listed ill the AD as of [il15el1date 35 days after date of publication il ()\n'INGSHW(ll

the FEDERAL REGISTER],

ADDRESSES: For service infonnation identified in this AD, contact Boeing

Commercial Airplw1cs, Attention: Data & Services Management, P. O. Box 3707, Me
(4910-I3-P]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

rDocket No. FAA~2008-0669; Directorate Identifier 2007·NM-350-ADj Amendment

39-'*; AD **]

RlN 2120-AA64

Ainvorthiness Directivesj Boeing Model 737-600, -700, and -800 Series Airplanes

AGENCY: Fcd~raJ Aviation Administration (FAA), DOT.

ACTION: Final rule.

SUMMARY: We are adopting a new airworthiness directive (AD) for certain Boeing

Model 737-600, -700, and -800 series airplanes. Tbis AD requires an inspectioD of the

free flange, vertical web, and radius between the free flange and vertical web oflhc low

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drill starts in the free t1ange, vertical web, and radius between the free flange and vertic

FEDERAL REGISTER].

loss of structural integrity of the wing center section and may result in a fuel leak.

web of the lower stringers of the wing center section lower stringers, which could cause

DATES: This AD is effective [insert date 35 days after date of publication in the

final assembly plant. We are issuing this AD to prevent cracks from propagating from

" 1-I" " , d "II d I" bl I d" "" "'1'-. \, \ IZl /..> stnngers 0 . t le wmg center sectlOn 'tOr n starts, an app lea e re ate mvestJgatlve '/.V~LS'SI('

and corrective" actIOns. " Th"IS H'D reSliIts t-rom d'n"IIstarts b"elI1g rloun d on tIle ~liee flange 0 lh''''kc ATE . ,.'

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the lower stringers of the wing center section during a quality assurance inspection at 1h
14910-13-PI

DEI' ARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR ParI 39

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(Docket No. FAA-200S-0669; Directorate Identifier 2007-NM-350-ADj Amendment l+. 0c~-v;",\

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RlN 2120-AA64

Airn'orthiness Directives; Boeing Model 737-600, -700, and -800 Series Airplanes

AGENCY: Fed~raI Aviation Administration (FAA), DOT.

ACTION: Final rule,

SUMMARY: We are adopting a new airworthiness directive (AD) for certain Boeing

Model 737-600, -700, and -800 series airplanes. This AD requires an inspection of the

free flange, vertical web, and radius between the free flange and vertical web of the low

stringers of the wing center section for drill starts, and applicable related investigative

and corrective actions. This AD results from drill starts being found on the free flange 0

the lower stringers of the wing center section during a quality assurance inspection at th

final assembly plant. We are issuing this AD to prevent cracks from propagating from

drill starts in the free flange, vertical web, and radius between the free flange and vertic

web of the lower stringers of the wing center section lower stringers, which could cause

Joss of structural integrity of the wing center section and may result in a fuel Jeak_

DATES: This AD is effective [insert date 35 days after date of publication in the

FEDERAL REGISTER].

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