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Ainvorthiness Directives; The Boeing Company Model 737-200, -300, ADO, and -500 14 CFR Part 39 ,lATH 

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FAA-2009-1224; Directorate Ide,. tiCier2009-NM-II8-AD; Amendment 

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applies to certain Model 737-300, -400, and -50@series airplanes. That AD currently ACTION: Final rule.



### "' requires aninspection to detennine the manufacturer and manufacture date ofthe oxyge (DOT) 

## • AGENCY: Federal Aviation Administration (F'AA), Department ofTransportation Series Airplanes

SUMMARY: The FAA is superseding an existing airworthiness directive (AD), which
masks inthe passenger service unit and the lavatory and attendant box assemblies, corrective action ifnecessary, and other specifiek action. This new AD expands the ~",,,,,-, ---- applicability inthe existing AD. This AD resultl from adetermination indicating that ROuT1NGsnlBOL additional airplanes may be subject to the identified unsafe condition. We are issuing thi r~"IAlSISIG AD toprevent the in-line flow indicators ofthe passenger oxygen masks from fracturing p,\Tli and separating, which could inhibit oxygen floJ to the masks and consequently result in I«JUTINGSYM>lPL exposure ofthe passengers and cabin attendants tohypoxia foHowing a depressurization 1~11"'1.&'51" event. I)A"j' DATES: This AD becomes effective [INSERTIDATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. 

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DEr ARTMENT OF TRANsrORTA nON Fede.-al Aviation Administration ONCVRRENCES OUTING S'fMOOl 14CFR rart 39 A1J'IYH \Lll.E;.t.) ENmALSISlt; IDocket No. FAA-2009-1224; Directorate Identifier 2009-NM-118-AD; Amendment 

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## lillY) m 39-**; AD **} RIN 2120-AA64 Airworthiness Directives; The Boeing cornpJ'y Model 737-200, ~300,-400, and -500 Series Airplanes ROUTING SYMao~ ImTIAlSISIG 

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# 14/z,Jp ACTION: Final rule. (DOT). AGENCY: Federal Aviation Administration (F'AA), Department ofTransportation
SUMMARY: The FAA is superseding anexisting airvlOrthiness directive (AD), which applies to certain Model 737-300, AOO, and -50@seriesairplanes. That AD currently masks inthe passenger service unit and the lavatory and attendant box assemblies, requires an inspection to determine the manufacturer and manufacture date ofthe oxyge

exposure ofthe passengers and cabin attendants to hypoxia following adepressurization OU11NG sYMBOl. 

### A1'00")~ rNm~SrG applicability inthe existing AD. This AD result, from adetermination indicating that 

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# .... I . ~NG~ AD to prevent the m-lme flow mdlcators ofthe passenger oxygen masks from fracturmg 

### ~IDQ:) and separating, wh.ichcould inhibit oxygen floJto the masks and consequently result in Itlt I IG corrective action ifnecessary, and other specifiep action. This new AD expands the

OUTING SYMBOL event. DATES: This AD becomes effective [INSERT DATE 35 DAYS AFTER DATE OF ~ NITIAl$ISIG PUBLICATION IN THE FEDERAL REGISTER]. OUTING SYMBOL NiTIAl$/SlG
DATE14910-13-PJ

DEPARTMENT OF TRANSPORT ATION Federal Aviation Administration 14CFR Part 39 ADXYH ILl

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## AJUfY)-jli.6 INmALSlSIG Series Airplanes RlN 2120-AA64 Ainvorthiness Directives; The Boeing Company Model 737-200, -300, -400, and -500 AGENCY: Federal Aviation Administration (FAA), Department ofTransportation I (DOT). ACTION: Final rule. requires an inspection to determine the manufacturer and manufacture date ofthe oxyge "T SUMMARY: The FAA is superseding anexisting airworthiness directive (AD), which applies to certain Model 737-300. -400, and -500 series airplanes. That AD currently
corrective action ifnecessary, and other specified action. This new AD expands the applicability inthe existing AD. This AD results from adetermination indicating that additional airplanes may be subject to the identifi~d unsafe condition. We are issuing thi masks inthe passenger service unit and the lavatory and anendant box assemblies,

AD toprevent the in-line flow ind.icators ofthe passenger oxygen masks from fracturin NIT1A"S/SIG and separating, which could inhibit oxygen flow to the masks and consequently result in exposure ofthe passengers and cabin attendants to hypoxia following adepressurization event. DATES: This AD becomes effective [INSERT DATE 35 DAYS AFTER DATE OF 

### , NI11.o.I5/SIG PUBLICATION IN THE FEDERAL REGISTER]. OVTING SYMOOL NlTlAI.SJSIG