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### CFR Part 39 [491O-13-PJ 

### DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration



# O.2.1'a (Docket No. FAA-2010-+++++; Directorate Identifier 2009-NM-252-AD] RlN 2120-AA64 Airworthiness Directives; McDonnell Douglas Corporation Model MD-l1 andMD-I Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). 

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### SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mo MO-II and MD-il Fairplanes. This proposed AD would require a one-time inspection detect damage ofthe wire assemblies ofthe tail tank fuel system, and corrective action necessary. This proposed.W results from fuel system reviews conducted by

### the manufacturer. We are proposing this AD toprevent apotential ofignition sources insid fueltanks, which, incombination with flammable vapors, could result ina fueltank fir orexplosion and consequent loss ofthe airplane. DATES: We must receive comments on this proposed AD by [insert date 45 days after date ofpublication inthe FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods:
• Federal eRulemaking Portal: Go to hnp:l/ww'.v.re2ulations.gov. Follow the instructions for submining comments.
• Fax: 202-493-2251.
• Mail: U.S. Department ofTransponation, Docket Operations, M-30, West Building Ground Floor, Room WI2-140, 1200New Jersey Avenue SE., Washington, 20590. \fn,"G~YMBOL

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### DEPARTMENT OF TRANSPORTATION Federal A"iation Administration 14CFR Part 39 [Docket No. FAA-2010-1 II If; Directorate Identifier 2009-NM-252-ADI RlN 2120-AA64 Ainvorthiness Directives; McDonnell Douglas Corporation Model MD-ll and MD-ll F Airplanes AGENCY: Federal Aviation Admjnistration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SU1\1MARY; We propose to adopt anew airworthiness directive (AD) for certain Model MD-ll and MD41lF airplanes. This proposed AD would require aone-time inspection to detect damage afme wire assemblies ofthe tail tank fuel system, and corrective actions if necessary. This proposed AD results from 

### fuel system reviews conducted 

### by the manufacturer. We are proposing this AD to prevent a potential of ignition sources inside fuel tanks, which, in combination with flammable vapors, could result in a fuel tank fire or explosion and consequent loss ofthe airplane. DATES; We must receive comments on this proposed AD by (insen date 45 days after date ofpublication inthe FEDERAL REGISTER]. 

### ADDRESSES: You may send corrunents by any of the following methods:
• Federal cRuJemaking Portal: Go to http://www.regulations.!!ov. Follow the instructions for submitting comments.
• Fax: 202-493-2251.
• Mail: U.S. Department ofTransportation. Docket Operations, M-30, West Building Ground Floor, Room WI2-140, 1200 New Jersey Avenue SE., Washington, DC 20590. 

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FAA Form 1360-14.1 (6-89} OFFICIAL FILE COPY