DEPARTMENT OF TRANS.POln AnON Fe~der:alAviatioifA:diriinistration 

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FAA Form 1360-14.1 (6-89) OFFICIAL FILE C PY14910-I3-PI

DEPARTMENT OF TRANSPORTATION Federal Aviation Administ.-ation 14CFR Part 39 

### IDocket No. FAA-20IO-++++; Directorate Identifier 20JO-NM-14J-AD] RJN 2120-AA64 Airworthiness Directives; B/E Aerospace Pro ective Breathing Equipment Part Numb· 119003-11 Installed on Various Transport AirPlanes AGENCY: Federal Aviation Administration (I)' DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for various transport airplanes equipped with certain 

### BIE Aerospace protective breathing equipmen (PBE) units. This proposed AD would require rlmOving affected PBE units. This proposed AD resuhs from reports ofpotentially defective potassium superoxide caniste used in PBE units, which could result in an exothermic reaction and ignite. We are proposing this AD to prevent PBE units from i~iting, \vhich could result in a fire and possible injury to the flightcrew or other persOll DATES: We must receive comments on this pr~posed AD hy [INSERT DATE 4S DAYS AFTER DATE OF PUBLICATION IN FHE FEDERAL REGISTER]. ADDRESSES: You may send comments by an~ ofthe following methods: • Federal eRulemaking Portal: Go to hu6:1/ww,\,.regUlations.gOv. Follow the instructions for submitting comments.
• Fax: 202-493-2251. • Mail: U.S. Department of Transportation, Docket Operations, M-30, West Bui.lding Ground Floor, Room W12-l40, 1200 New Jersey Avenue SE., Washington, D 20590. U11SGS'''' L IN'T'~L5ISIG

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