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# OB53 (Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-116-AD)

from reports that the warning born did not sound during the takeoff warning system test ofthe S132 "nose up stab takeoffwaming switch." We are proposing this AD to detect and correct atakeoff warning system switch failke, which could reduce the ability ofth flightcrew to maintain the safe fiight and landin1 ofthe airplane. OATES: We must receive comments on this pffPosed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION fN HE FEDERAL REGISTER]. ADDRESSES: You may send comments by an

# Iofthe following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the DEPARTMENT OF TRANSPORTATION
-900, and -900ER Series Airplanes
takeoff warning switches, and corrective actions ifnecessary. This proposed ADresults 737 series airplanes. This proposed AD would require repetitive testing ofthe stabilizer RIN 2120-AA64 Federal A\'iation Administration Ainvorthiness Directives; The Boeing Company Model 737-600, -700, -70DC, -800, 14CFR Part 39
AGENCY: Federal Aviation Administration (Fi)' DOT.

.ACTION: Notice ofproposed rulemaking (NPRM). 

### "',/. SUMMARY: We propose to adopt anew airworthiness directive (AD) forcertain Mode 

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instructions for submitting comments. • Fax: 202-493-2251. 

## " • Mail: U.S. Department ofTransportation, Docket Operations, M-30, West Building Ground Floor, Room W12-l40, 1200New Jersey Avenue SE., Washington, D 20590.(49\ 0-13-Pj

DEPARTMENT OF TRANSPORT AT10N Federal Aviation Administration :ONCURI<£Nl:ES .OUTJ"G S'lMliOL 14CFR Part 39 IDocket No. FAA-2010-++++; Directorate Identifier 20JO-NM-1I6-AD] RJN 2120-AA64 Ain'Vorthiness Directives; The Boeing Company Model 737-600. -700, -70De, -800, -900, and -900ER Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). 

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NInALSfSlG 737 series airplanes. This proposed AD would require repetitive testing ofthe stabilizer takeoff warning switches, and corrective actions ifnecessary. This proposed AD results from reports that the warning horn did not sound during the takeoff warning system test ofthe S132"nose up stab takeoff warning 

### sWitct" We are proposing this AD to detcct AT and correct atakeoff warning system switch failLe, which could reduce the ability ofth flightcrew to maintain the safe flight and landinJ ofthe airplane. DATES: We must receive comments onthis pr1posed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADDRESSES: You may send comments by ant ofthe following methods: • Federal eRulemaking Portal: Goto http://www.regulations.gov. Follow the 

### 1i""'-I3ID if/!> SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mod IG

instructions for submitting comments. ounNG '.iYMlIO~ • Fax: 202-493-2251. NlT1!\lS,'SIG • Mail: 

## u.s. Department ofTransportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, D 20590. "rnAIS'SIG[4910-13-P]

DEPARTMENT OF TRANSPORTATION

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INm"<.5{SIG Federal Aviation Administration 

# l 14CFR Part 39 [Docket No. FAA-2010-++++; Directorate Ide tiller 2010-NM-116-ADI 

# I RlN 2120-AA64 Ainvorthiness Directives; The Boeing Company Model 737-600, -700, -700e, -800, -900, and -900ER Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: Wepropose toadopt anew airwohhiness directive (AD) forcertain Mod 737 series airplanes. This pr6posed AD would re~uire repetitive testing ofthe stabilizer takeoff warning switches, and corrective actions ifnecessary. This proposed AD results 

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# 3m from reports that the warning horn did not sound during the takeoff warning system test Ii ofthe S132"nose up stab takeoff warning switch." We areproposing this AD todetect and correct atakeoffwaming system switch failure, which could reduce the ability cfth flightcrew to maintain the safe flight and landing ofthe airplane. DATES: We must receive comments onthis profosed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADDRESSES: You may send comments by an)~fthe following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the 

## '" instructions for submitting comments. • Fax: 202-493-2251. • Mail: U.S. Department ofTransportatio~, Docket Operations, M-30, West 

# I ~ Building Ground Floor, Room W12-140~ 1200New Jersey Avenue SE., Washington, D 'OU'l1NG sYMOOL 20590. Nmi>LSJSIG