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14CFR Part 39 Federal Aviation Administration



# 17.2..0 (Docket No. FAA-2009-1 : II Ij Directorate Identifier 2009-N1\1-149-ADj



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### AiJrtH'ioS Airworthiness Directives; Boeing Mode1737-600, -700, -70De, -800, and -900 Series Airplanes AGENCY: Federal Aviation Administration (FAA), Department ofTransportation



# .~ That AD currentJy requires revising the Airworthiness Limitations (AWLs) section ofth 

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### iu/01 Instructions for Continued Airworthiness by incorporating new limitations for fuel tank wn,NG SYI1!lOl 

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- 7 systems to satisfy Special federal Aviation Regulation No. 88 requirements. This AD 1iITlAl.S.'S ••• 

# c..(/<-.>...- applies to certain Boeing Model 737-600, -700, -70De, -800, and -900 series airplanes. ~ ACTION: Final rule; request for comments. SUMMARY: The FAA isrevising an existing airvo/Orthinessdirective (AD), which (DOT).

also requires the initial inspection ofacertain repetitive A\VLinspection to phase intha inspection, and repair ifnecessary. This AD clarifies the intended effect ofthe AD on OVllNG SYHSDL spare and on-airplane fuel tank system components. This AD results from adesign review ofthe fuel tank. systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused 

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# /jjJ.:J./ D OlJl1NG SYHOOL maintenance actions, which, in combination with flammable fuel vapors, could result in ~1- 16 

### ~= fuel tank explosion and consequent loss ofthe airplane.



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DEPARTMENT OF TRANSPORTAnON Fedcnl Aviation Administration '·ONO.J"""'1l:~5 Ol,InNG SYMBOL 

### 14CFR Part 39 (Docket No. FAA-2009·1 I t t Ij Directorate Identifier 2009-NM-149-AD;



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# .~ applies to certain Boeing Model 737-600, -700, -700e, -800, and -900 series airplanes. SUMMARY: The 

### fAA is revising an existing airworthiness directive (AD), which

also requires the initial inspection ofacertain repetitive AWL inspection to phase in tha inspection, and repair ifnecessary. This AD clarifies the intended effect of the AD on systems to satisfy Special Federal Aviation Regulation No. 88 requirements. This AD Instructions for Continued Airworthiness by incorporating new limitations for fuel tank That AD currently requires revising the Airworthiness Limitations (AWLs) section ofth ACflON: Final 1111e; request for comments. (DOT). Airplanes AGENCY: Federal Aviation Administration (FAA), Department ofTransportation

spare and on-airplane fuel tank system components. This AD results from adesign review ofthe fuel tank systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, which, in combination with flammable fuel vapors, could result in fuel tank explosion and consequent loss ofthe airplane. DATES: This AD is effective [insert d~te 15 days after date ofpublication in the 

### FEDERAL REGISTER]. .Amendment 39-**; AD 2008-10-10Rlf 11/30 

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