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### AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), andMD-88 Airplanes RlN 2120-AA64 ""'-'T'NO ""&0\. 

### [Docket No. FAA-2010-0S49; Directorate Ideotifier 2010-NM-I09-AD; Amendme tll 

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# . Airworthiness Directives; TheBoeing Company Model DC-9-81 

### crvlD-81), DC-9-82 14CFR Part 39 Federal Aviation Administration DEPARTMENT OF TRM,SPORTATION 14910-13

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### SUMl\1ARY: We are adopting anew ainvorthiness directive (AD) forthe products lis ed above. This ADrequires installing fuel level float and pressure switch in-line fuses on he wing forward spars and forward and aftauxiliary fuel tanks, depending on the airplane 'HITlIIL$'SIGN"TURE 

### configuration. This AD was prompted by 

### fuel system revic\vs conducted by 

### the manufacturer. We are issuing this AD toprevent the potential ofignition sources insid Io",r~ RO,flLNC S'r"BOL
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### fuel tanks, which, incombination with flammable fuel vapors, could result infuel tank

ADDRESSES: For service information identified inthis AD, contact Boeing Commercial Airplanes, Attention: Data &SerVjJces Management, 3855 Lakewood Boulevard, MC D800-0019, Long Beach, California 90846-0001; tclephone PUBLICATION INTHE FEDERAL REGISTER]. certain publication listed intheAD asof [INSERT DATE 35 DAYS AFTER DATE 0 explosions and consequent loss ofthe airplane.1 I 

### DATES: This AD iseffective [INSERT DATE 35 DAYS AFTER DATE OF I 

### PUBLICATION INTHE FEDERAL REGISTER]. I 

### The Director ofthe Federal Register approved the incorporation by reference 0



### 206-544-5000, extension 2; fax206-766-5683; e-mail dse.boecom@boeing.com; Internet FAA Form 1360-14.1 (6-89) OFFICIAL FILE COPY 

# *u.s. GOVERNMENT PRINTING OFFICE; '995 - 769·211, ,

DEPARTMENT OF TRANSP0RTATION Federal Aviation Administration 14 CFR Part 39 

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- - - [Docket No. FAA-2010-0549; Directorate J.dentifier 2010-NM-L09-AD; Amendment 39_**; AD 

###  -** -**) RIN 2120-AA64 Airworthiness Qirectives; McDonnell D~~glas Corpo!':!tion Model DC-9-8"1 (MD-81), I DC,9-82 (MD-82), DC-9-83 (MD-83J, DC~9-87 (MD-8?), and MD-88 Airplanes AGENCY: Federal Aviatjon Administration (FAA), 

# ndt. ACTION: FinaJ rule. ,I SUMMARY: Weare adopting a'new air\."'orlhiness directive (AD) for the,products listed above. This AD req~i.resinstalJingfuellevel float and p)essure,switch in-line 

## fuses on the'-- \vingforward spars and forward and aft au~iljary fuel taJks, depending on the airplane , configuratioA This AD was prompted byfuel sy~~ymre1iews conducted by the I manufacturer. We are issuing this AD to pr~vent the potJntial ofignition sources inside fuel tanks, which, in combination with.flammable fuel vipors, could result infuel tank explosions and con,equent los>ofthe airplane. 

# I DATES: This AD is:effective [INSERT DATE 35 DA

# 'filS AFTER DATE OF PUBLICATION IN THE FEDERAL REOlSTER]. The Director ofthe Pederal Regi,ter ~pproved t4 incorporation 

### by reference of a certain pubUcati~)Jilisted in the AD as of [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. ADDRESSES: For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Data &Services Man~gement, 3855 Lakewood I Bou1evard,.MC DSOO-OO 19, Long Beach, California 90146-0001; telephone 206-544-5000, extension 2; fax 206-766-5683; e-mail dse.boecom((il,boeinl!..com;' Internet 

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