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DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CFR Part 39 (Docket No. FAA-2009-0685; Directorate Identifier 2009-NM-I13-AD; Amendme 

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J-Dlb- to-2D RIN 2120-AA64 Airworthiness Directives; McDoJUleUDouglas Corporation Model DC-9-30, DC-9-4 and DC-9-50 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. SUMMARY: We are adopting anew airworthiness directive (AD) forcertain Model DC-9-30, DC-9-40, and DC-9-50 series airplanes. This ADrequires inspecting to determine the part numbers ofthe fOIWardand aft auxiliary tank fuel boost and transfe pump conduit/conduit assembly and conduit assembly electrical connector, as applicab and corrective actions ifnecessary. This AD results from fuel system reviews conducte by

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### Commercial Airplanes, Attention: Data &Services Management, 3855 Lakewood theFEDERAL REGISTER]. The Director ofthe Federal Register approved the incorporation by reference 0 

### certain publication listed inthe AD as of [insert date 35 days after date ofpublication 1 

### FEDERAL REGISTER]. DATES: This AD iseffective [insert date 35 days after date ofpublication inthe inafire orexplosion. arc/spark condition to occur within the fuel boost ortransfer pump conduit assembly connectors and propagate into theforward and aft auxiliary fuel tanks, which could res rn>.UJSJ(;;



### ADDRESSES: For service infonnation identified inthis AD, contact Boeing[49I0-13-PJ

DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 14CFR Part 39 [Docket No. FAA-2009-0685; Directorate Identifier 2009-NM-I13-AD; Amendment 39-**; AD *"'] RIN 2120-AA64 Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, OC-9-40, and DC-9-50 Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACfION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for certain Model DC-9-30, DC-9-40, and DC-9-50 series airplanes. This AD requires inspecting to determine the part numbers ofthe fOlWard and aft auxiliary tank fuel boost and transfer pump conduit/conduit assembly and conduit assembly electrical connector, as applicable. and corrective actions 

### ifnecessary. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to detect and correct the potential for an arc/spark condition to occur within the fuel boost or transfer pump conduit assembly connectors and propagate into the forward and aft auxiliary fuel tanks, which could result in a fire or explosion. DATES: This AD is effective [insert date 35 days after date ofpublication in the FEDERAL REGISTER]. The Director ofthe Federal Register approved the incorporation by reference of a certain publication listed in the AD as of [insert date 35 days after date ofpublication in the FEDERAL REGISTER]. ADDRESSES: For service information identified in this AD. contact Boeing Commercial Airplanes, Attention; Data & Services Management, 3855 Lakewood !ONCl..lAAE>lCES ""'crr,""" .•.•.•

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FAA Form 1360·14.1 (6-$9) OFFICIAL FILE COPY