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DEPARTMENT OF TRANSPORTA nON 14CFR Par' 39 Federal Aviation Administration



# 0011 [Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-075-AD) 

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fuselage skin at skin lapjoints, the skin at certain external approved repairs, the skin 727 airplanes. This proposed AD would require inspections for scribe lines inthe R1N 2120-AA64

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# "SIte/ZO/O around external features such as antennas, and the skin atdecals; and related investigath AGENCY: Federal Avialion Administration (BAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUM'MARY: We propose to adopt anew airworthiness directive (AD) for certain Mod Airworthiness »irectivcs; The Boeing Company Model 727 Airplanes



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• Fax: 202-493-2251. instructions for submitting comments. found at skin lapjoints and buttjoints, around external repairs and antennas, and at locations where external decals had been cut. We are proposing this AD to detect and correct scribe lines, which can develop into fatigue cracks inthe skin and cause sudden decompression ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 

## I . DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods: 

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• Federal eRulemaking Portal: Go to http://ww\..v.rellulations.gov. Follow th~ .•• ~ '20 

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# '!t'DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration "ONC:U~RENCES ounNG SYMBOL 14CFR Part 39 

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# m:_ [Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-075-AD) RIN 2120-AA64 INIlIAlS/SIG

OI/TING sYHIlOl Airworthiness Directives; The Boeing Company Model 727 Airplanes ACTION: Notice ofproposed rulemaking (NPRM). AGENCY: Federal Aviation Administration (FAA), DOT. SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mod .0 roc Ol

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# 's/;e/zb,o 727 airplanes. This proposed AD would require inspections for scribe lines inthe fuselage skin at skin lapjoints, the skin atcertain external approved repairs, the skin arolUldexternal features such as antennas, and the skin atdecals; and related investigati and corrective actions ifnecessary. This proposed AD results from reports ofscribe line II found at skin lapjoints and buttjoints, around external repairs and antennas, and at locations where external decals had been cut. We are proposing this AD to detect and correct scribe lines, which can develop into fatigue cracks inthe skin and cause sudden decompression ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 

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• Fax: 202-493-2251. 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.gov. Follow 

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