### 149\Q-13-PI DEPARTMENT OF TRANSPORTATION 

### Fedenl A

viation Administration 14eFR Part 39 II"TI 

### [Docket No. FAA-2009-0686; Directorate Identifier 2009-NM-044-ADj Amendme 

## levlS';- . ~ 39-**; AD 

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## '2. - '. -'.-'" RIN 2120-.'\.'\64 Airworthiness Directives; McDonnell Douglas Corporation Model MD-!l and MD-I 

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# ""Ill-Iu~ Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We arc adopting anew airworthiness directive (AD) forcertain IJ!/l-l~"() McDonnell Douglas Corporation Model MD-l1 and MD-IIF airplanes. This AD 

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" requires aone-time inspection to determine ifwires touch the upper surface orthe cent rJ2

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### upper auxiliary fuel tank and marking the location, ifnecessary; aone-time inspection f "111~L'SlG 

### all wire bundles above the center upper auxiliary fuel tank for splices and damage; aon - time inspection fordamage tothe fuelvapor barrier seal and upper surface ofthe cente]

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### explosions and consequent loss ofihe airplane. DATES: This AD iseffective [insert date 35 days arrer date ofpublication inthe FEDERAL REGISTER]. manufacturer. We are issuing this AD to reduce the potential of ignition sources inside and anew extmded channel. This AD results from fuel system reviews conducted by t installation ofnonmetaUic barrier/shield sleeving, new clamps, new atlaching hardware upper auxiliary fuel tank; and con-ectivc actions, ifnecessary. This AD also requires

fuel tanks, which. incombination with Oanunable fuel vapors, could result in fuel tank

### 1~910-13-Pj

DEPARTMENT OF'TRANSPORT<\. TION Federal Aviation Administration 14CFR Part 39 [Docket No. FAA-2009-0686; Directorate Identifier 2009~Ni'II-044-AD; Amendment 39-"''''; AD 

## ""'I Rl~ 2120-AA6~ Ain\'orthincss Directives; McDonnell Douglas Model MD-Il and MD-I IF Airplanes AGENCY: Federal Aviation Adml.nisuarion (FAA), DOT. ACTION: Final rule. SUMMAH.Y: We arc adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model MD-ll and MD-il Fairplanes. This AD requires aone-lime i.nspection to determine ifwires lauch the upper surface of the center upper auxiliary fuel 

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lank and marking the location. ifnecessary: a one-lime inspection ofall win...bundles ~ovc the center upper au.'\iliary 

### fuel tank for splices and damage; aonc-time inspection for damage to the ruel vapor barrier seal and upper surface of the cemer upper auxiliary fuel tank: and corrective actions. ifnecessary. This AD also requires installation of nonmetallic barrier/shield slceving. new clamps. new attaching hardware. and a new extruded channel. This AD resulrs from fuel system reviews conducted by the manufacturer. \Ve are issuing this AD to reduce (he potential of ignition sources inside fuel tanks. which, in combination \'lith tlammable fuel vapors, could resuh in fuel tank explosions and consequent loss ofthe airplane. DATES: This AD is effective [inscl1 date 35 days after date of publication in the FEDERAL REGISTER]. The Director ofthe Federal Register approved the incorporation by reference of a certain publication listed in lhe AD as of linsert date 35 days after date of publicati 011 in the FEDERAL REGISTER]. ROllH''''' s••.• ,I<I'. f'i-GL -



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FAA Form 1360-14.1 (6-891 OFFICIAL FILE COPY