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OEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CPR Part 39 ") F· ~ r 

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_'/L.-l,-- IDocket No. FAA-2-9f:ti<-+-tt++; Directorate Identifier 2009-NM-262-AD;



## , -=l 1 ~, , Amendment 39Jx; AO 2J-1O Rli IUN 2120-AA64 Ain\'ort'hiness Directives; AVOX Systems and 

### B/E Aerospace Oxygen Cylinder Assemblies, as Installed on Various Transport Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule; request forcomments. SUMMARY: The FAA is revising an existing ainvorthiness directive (AD), which applies 10certain AVOX Systems and BfE Aerospace oxygen cylinder assemblies, as installed onvarious transpOl1 airplanes. That AD currently requires removing certain 

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## '" oxygen cylinder assemblies from the airplane. This AD removes certain oxygen cylindc 

# ;'JF~H<lOL part numbers from the applicability. This AD was prompted by the reported rupture 

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. high-pressure gaseous oxygen cylinder, which had insufficient strength characteristics MT~ 

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## trus AD to prevent an oxygen cylinder from rupturing, which, depending on the location, could result in structural damage and rapid decompression of the airplane, damage to adjacent essential night equipment, deprivation of the necessary oxygen supply for the flightcrew, and injury to cabin occupants or maintenance or other supp0r! personneL DATES: This AD iseffective [insert date 15days after date ofpublication inthe FEDERAL REGISTER]. We must receive any comments on this AD by [insert date 45 days after date of publication in the FEDERAL REGISTER]. 0U11t¥.; S-,l'tIlOl 

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DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration U O'R Pllrt 39 IDocke.tNo. FAA-200*-1 J ! : I;Directorate Identifier 2009-NM-262-A.D; Amendment 39-*'; AD 2)-10 Rll RlN 2120-AA64 Ain't'orthiness Directives; AVOX Systems and 

### B/E Aerospace Oxygen Cylinder Assemblies, as Installed onVarious TranspOlt Airplanes AGENCY: Federal Aviation Administration (FAA). Department ofTransportation (DOT). ACTION: Final rule; request forcomments. SUMMARY: The FAA isrevising anexisting airworthiness directive (AD). which applies to certain AVOX Systems and 

### BIE Aerospace oxygen cylinder assemblies. as :ONCVR~fN[ES 1!1'INGs-mWI 

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installed onvarious transport airplanes. Thai AD currently requires removing certain 

### IJE/¥Z.3jv~ oxygen cylinder assemblies from the airplane. This AD removes certain oxygen cylinde HGSYffilDl. 

## 5t;'k ,;'C) pan numbers from the applicability. This AD was prompted by the reponed rupture ofa NlnAlS/SIG high-pressure gaseous oxygen cylinder, which had insufficient strength characteristics due to improper heat treatment. We are issuing this AD toprevent an oxygen cylinder fromrupturing, which, depending onthe location. could result instructural damage and rapid decompression ofthe airplane. damage toadjacent essential flight equipment. deprivation ofthe necessary oxygen supply forthe flightcrew. and injury to cabin occupants or maintenance orother support personnel. DATES: This AD iseffective [insert date 15days aftcr date ofpublication inthe FEDERAL REGISTER]. We must receive any COlTImelllS on this AD by [insert done45 days after date of publication inthe FEDERAL REGISTER]. 

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