### 14 CFR Part 39 [4910-13-P]

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration



# 0553 [Docket No. FAA-2010-++++; Directorate Identifier 201O-NM-070-AD] RlN 2120-AA64 Airworthiness Directives; McDonnell Douglas Corporation Model DC~10-30, DC-10-30F, DC-10-30F (KC-lOA and KDC-10), DC-1O-40, DC-1O-40F, and MD-10-30F Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mo DC-IO-30, DC-IO-30F, DC-10-30F (KC-10A and KDC-IO), DC-IO-40, DC10-40F,an MD-IO-30F airplanes. This proposed AD would require doing aone-time inspection of the\virebundles todetermine ifwires touch theupper surface ofthe center upper auxiliary fuel tank, andmarking the location 

### ifnecessary; aone-time inspection for splices and damage ofall wire bundles routed above the center upper auxiliary fueltank aone-time inspection for damage to the fuelvapor barrier seal and upper surface ofthe center upper auxiliary fueltank; and corrective actions, ifnecessary. This proposed AD :O ••••• 1JRIm'lCE OuTINGSYMBO

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### would also require installing non-metallic barrier/shield sJeeving to the wire harnesses, new clamps, new attaching hardware, and new extruded channels. This proposed AD results from fuel system reviews conducted by the manufacturer. We areproposing this rNlTlAUISIC 

### AD toprevent thepotential ofignition sources inside fuel tanks, which, in combination AT~ 

### with flammable fuel vapors, could result infuel tank explosions and consequent loss of the airplane. DATES: We must receive comments on thisproposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. UTINCi SYMBOL

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DATE14910-13-Pj

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CFR Part 39 (Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-070-AD] RIN 2120-AA64 Airworthiness Directives; McDonnell Douglas Corporation Model DC-l 0-30, DC-IO-JOF, DC-10-JOF (KC-IOA and KDC-IO), DC-IO-40, DC-IO-40F, and MD~I0-30F Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPR.M). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Model DC-IO-JO, DC-IO-JOF, DC-IO-30F (KC-IOA and KDC-IO), DC-IO-40, DCI0-40F, and MD-IO-30F airplanes. This proposed AD would require doing aone-time inspection of the wire bundles to determine ifwires touch the upper surface 

### afme center upper auxiliary fuel tank, and marking the location ifnecessary; aonc-time inspection for splices and damage ofall wire bundles routed above the center upper auxiliary fuel tank; aone-time inspection for damage to the fuel vapor barrier seal and upper surface of the center upper auxiliary fuel tank; and corrective actions, ifnecessary. This proposed AD would also require installing nonmetallic barrier/shield sleeving to the wire harnesses, new clamps, new attaching hardware, and new extruded channels. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent the potential of ignition sources inside fuel tanks, which, in combination with flarmriable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane. DATES; We must receive comments on this proposed .W by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER). 

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FAA Form 1360-14.1 {G-8S) OFFICIAL FILE COPY