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OEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CPR Part 39 ") F· ~ r 1/'1 _'/L.-l,--

IDocket No. FAA-2-9f:ti<-+-tt++; Directorate Identifier 2009-NM-262-AD;

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Amendment 39Jx; AO 2J-1O Rli

IUN 2120-AA64

Ain\'ort'hiness Directives; A VOX 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 for comments.

SUMMARY: The FAA is revising an existing ainvorthiness directive (AD), which

applies 10 certain A VOX Systems and BfE Aerospace oxygen cylinder assemblies, as

installed on various 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 ora tlTllAl~GJ

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

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due to improper heat treatment. We arc issuing 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 is effective [insert date 15 days after date of publication in the

FEDERAL REGISTER].

We must receive any comments on this AD by [insert date 45 days after date of

publication in the FEDERAL REGISTER].

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DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

U O'R Pllrt 39

IDocke.t No. 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 on Various TranspOlt Airplanes

AGENCY: Federal Aviation Administration (FAA). Department of Transportation

(DOT).

ACTION: Final rule; request for comments.

SUMMARY: The FAA is revising an existing airworthiness directive (AD). which

applies to certain AVOX Systems and BIE Aerospace oxygen cylinder assemblies. as

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installed on various transport airplanes. Thai AD currently requires removing certain IJE/¥Z.3jv~

oxygen cylinder assemblies from the airplane. This AD removes certain oxygen cylinde HGSYffilDl.

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pan numbers from the applicability. This AD was prompted by the reponed rupture of a NlnAlS/SIG

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

due to improper heat treatment. We are issuing this 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 flight equipment.

deprivation of the necessary oxygen supply for the flightcrew. and injury to cabin

occupants or maintenance or other support personnel.

DATES: This AD is effective [insert date 15 days aftcr date of publication in the

FEDERAL REGISTER].

We must receive any COlTImelllS on this AD by [insert done 45 days after date of

publication in the FEDERAL REGISTER].

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