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DEPARTMENT OF TRANSPORTATION

Fedenl Aviation Administration

14 eFR Part 39

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

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39-**; AD "'*J '2. - '. -'.-'"

RIN 2120-.'\.'\64

Airworthiness Directives; McDonnell Douglas Corporation Model MD-!l and MD-I

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Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

SUMMARY: We arc adopting a new airworthiness directive (AD) for certain IJ!/l-l~"()

McDonnell Douglas Corporation Model MD-l1 and MD-IIF airplanes. This AD --t'lN./.

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requires a one-time inspection to determine ifwires touch the upper surface orthe cent r J2 (I &/ ,,;\

;o:lun'>(;~'lII<llupper auxiliary fuel tank and marking the location, if necessary; a one-time inspection f

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all wire bundles above the center upper auxiliary fuel tank for splices and damage; a on -

time inspection for damage to the fuel vapor barrier seal and upper surface of the cente]

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explosions and consequent loss ofihe airplane.

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

FEDERAL REGISTER].

manufacturer. We are issuing this AD to reduce the potential of ignition sources inside

and a new 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, if necessary. This AD also requires

fuel tanks, which. in combination with Oanunable fuel vapors, could result in fuel tank
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DEPARTMENT OF' TRANSPORT<\. TION

Federal Aviation Administration

14 CFR 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 F airplanes. This AD requires a one-lime

i.nspection to determine if wires lauch the upper surface of the center upper auxiliary fuel

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lank and marking the location. if necessary: a one-lime inspection of all win ...bundles

~ovc the center upper au.'\iliary fuel tank for splices and damage; a onc-time inspection

for damage to the ruel vapor barrier seal and upper surface of the cemer upper auxiliary

fuel tank: and corrective actions. if necessary. 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 of the airplane.

DATES: This AD is effective [inscl1 date 35 days after date of publication in the

FEDERAL REGISTER].

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

certain publication listed in lhe AD as of linsert date 35 days after date of pub licati 011 in

the FEDERAL REGISTER].

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