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DEPARTMENT OF TRANSPORTATION 

## C.G<-- Federal Aviation Administration \4 CFR Part 39 

# '2010-l:LW {DocketNo. FAA-~-++++; Directorate Identifier 2010-NM-270-AD; Amen 

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# 15 39-**; AD 

#  -** -**] R1N 2120-AA64 

## Airworthiness Directives; The Boeing Company Model 757-200, 

## -20DCB, and·3 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. 

## -/07) ACTION: Final rule; request forcomments. "1TIALSiS 

## SUMMARY: We are adopting anew airworthiness directive (AD) forthe product' ~

# ! above. This AD requires repetitive inspections forcracking ofthe fuselage skin of
crown skin panel along the chern-milled step atstringers S-4 left and 8-4 right, fro stations (STA) 297 through STA 439, and repair ifnecessary. Th..isAD also indud m terminating action forthe repetitive inspections ofthe repaired areas only. This OllTl!lG SYMBOL 

## prompted by 

## reports ofcracking inthe fuselage skin ofthe crown skin panel. We a IlJm~l.SISlG 

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# ,~ issuing this AD to detect and correct fatigue cracking ofthe fuselage skin ofthe cr

PUBLICATION INTHE FEDERAL REGISTER]. certain publication listed inthe AD as of [INSERT DATE 15DAYS AFTER DAT The Director ofthe Federal Register approved the incorporation by referen DATES: This AD is effective [INSERT DATE 15DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. the airplane. skin panel, which could result inpressure venting and consequent rapid decompre

We must receive comments on this AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER].[4910-13-Pj DEPARTl\lENT OF TRANSPORT AnON Federal A,·jation Administration 14 CFR Pari 39 [Docket No. FAA-2011-++++; Directorate Identifier 2010-NM-27o-AD; Amendment

RIN 2120-AA64 Airworthiness Directives; The Boeing Company Model 757+200, ·20GCR and +300 Series Airpl:mes AGENCY: Federnl Aviation Administration (F.'\A). DOT. ACTION; Final rule; request for comments. SUI\'lMARY: We arc adopting anew ainl'onhiness directive (AD) for the products listed above. This AD requires repetitive inspections for cracking ofthe fuselage skin ofthe
crown skin panel along the chem-milled step i1tstringers S-4 left and S-4 right, from stations (STA) 297 through STA439. and repaidfnecessary, This AD also includes temlin'l\ing anion for the repetitive inspections ofthe repaired areas only. This AD was prompted by rcpons of cracl..ing inthe fuselage skin ofthe crown skin panel. We are issuing this AD to detect and correcl fatigue crnckiug ofthe fuselage skin ofthe crown skin panel. which could result inpressure venting and consequent rapid decompre$sion of 

### the nirplane. DATES; TIlis AD is effective (fNSERT DATE 15 DAYS AFTER DATE OF PUBLICATION lNTHE FEDERAL REGISTER). The Director of the Federal Register approved lhc incorportion by reference of a certain publicntion listed in the AD as of [INSERT DATE 15 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. We must receive comments on this AD by [INSERT DATE 45 DAYS AFfER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. U~R.m:"S oonl'fG $•••••

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# ._------------[4910-13-Pj DEPARTi\lENT OF TRANSPORTATION Fcdcrnl Aviation ,\dminlstratioll 14eFR I'art 39 IDocket No. FAA-2011-++++; Directorate Idenlil'ier 2010-NM-270-AD; Amendment 39-•.•.; AD •.•.•••.

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Airworthine~s Diredives; The Boeing Company Modc:1757"200, -200CB.llnJ -300 S"ries Airplanes AGENCY: Federal Aviation Administrc.tion (FAA). DOT. ACTIO~; Final mte; rcquesl for comnu:nls. SUMMARY: We ~re :idopting a new ainvorthiness directive lAD) for Ibe producL~ listed above".111isAD requim; repetitive insp<xtions forcracking of [he fuselage skin of the crO•.•. ll skin p;mel along the chern-milled step at stringers 5·4 left;md 5-4 right, from stations (STA) 297 through STA 

### 4.'9, and rtpair ifnecessary. This AD also inclL1des lemlinating <lcliollfOfthe repetitive inspections oflhe repaired ar<.las only, This AD was prompted by rcpons of cracking in thl.'fuselage skin ofthC' crown skin panel. Wc art' issuing 1his ,\Dto detect and correct fatigue cracking ofthe fusel:lge skin of the crown skin p;mcl, which could result in pressure venling and consequent fapid decomprcssioJl of the :lirplune. DATES: This AD iselTcctivc [INSERT DATE 15 DAYS Af"TER DATE OF PUBLICATION IN THE FEDERAL REGISTER}. The Director of the Federal Rcgis1cr approved the incorpor.lIion by reference of:\ cenllin public,lliM listed in thc AD as of[INSERT DATE 15 DAYS AFTER Dr\TE OF PVBLlCAT~ON INTHE FEDERAL REGISTER]. We must n:ccl\'e commcnts on thiS AD by [INSERT DATE 4j DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTERj. ;O~Cu"RJ:"tE:; "'mrtGs' ••••

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