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AGENCY: Federal Aviation Administration (FAA), DOT. I 

### ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airwJrthiness directive (AD) for the products listed above. This proposed AD results from mldatOry continuing airworthiness I OUT . G $YMSOl 

### infonnation (MeAl)originated by an aviation authority ofanother country to identify LNITIAI..>ISJG 

### and correct anunsafe condition on an aviation 

# pioduct. The MeAl describes the unsafe 

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# OlOO (Docket No. FAA-2010-*****; Directorate Identifier 2010-NM-123-AD]

Jet Series 900) Airplanes RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc. Model CL-600-2CIO (Regional Jet Series I 

### 700,701, &

### 702), CL-600-2Dl5 (Regional Jet Series 705), and CL-600-2D24 (Regional DEPARTMENT OF TRANSPORT ATlON

14 CFR Part 39 Federal Aviation Administration

condition as: OUTING 'YMBOL 

### The manufacturer has informed Transport Canada that acertain number of , 

### the resolver stators, which were installeq inthe angle of attack (AOA) transducers, were not cleaned correctlY'lfhis condition can degrade the ADA transducer performance atlow temperatures resulting in freezing of the ADA transducer resolver, which may provide inaccurate ADA data to the Stall Protection System (SPS). Ifnotlcorrected, this condition can result in early or late activation ofthe stick shaker and/or stick pusher. ATE
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### These conditions could result inreduced ability ofthe flight crew to maintain a safe fligh NlTlAJ.s'SJG 

### and landing ofthe airplane. The proposed AD would require actions that are intended to om 

### address the tmsafe condition described inthe

# MlAL[4910-13-PJ

DEPARTMENT OF TRANSPORTATION 

### Federal Aviation Administration 14 CFR Part 39 

### (Docket No. FAA-20lO-*****; Directorate Identifier 2010-NM-123.ADJ RlN 2120·AA64 Airworthiness Directives; Bombardier, Inc. Model CL-60Q-2CIO (Regional Jet Series 700,701, & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) Airplanes AGENCY: Federal Aviation Administration (FAA)JDOT. I ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness UENCF ..• UT1N ~Y"'1j()I ANE-17J
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_, M information (MeAl) originated byan aviation authority of another country to identify J. ~I+ m and correct an unsafe condition on an aviation product. The 

### MeAl describes the unsafe condition as: The manufacturer has informed Transport Canada that a certain number of the resolver stators, which were installed in the angle of attack (ADA) transducers, were not cleaned correctly. This condition can degrade the AOA transducer perfonnance at low temperatures resulting in freezing of the ADA transducer resolver, which may provide inaccurate ADA data to the Stall Protection System (SPS). If not corrected, this condition can result in early or late activation of the stick shaker and/or stick pusher.
These conditions could result in reduced ability of the flight crew to maintain a safe flight and landing of the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the 

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OlJTlm;; SVMB'[4910-13-Pj DEPARTMENT OF TRANSPORTATION Federal Avialion Administration 14eFR Parl39 [Docket No. FAA-2810-*****; Directorate Identifier 2010-NM·123-AD] RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc. ModeJCl.r600-2CIO (Regional Jet Series 700,701, &702), CL-600-2DI5 (RegiollilJJet Series 705), and CL-6DO-2D24(Regional Jet Series 900) Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACftON: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) lortheproducts listed above. This proposed ADresults frommandatory continuing ,airworthiness informalion (MeAl) originated by an aviation authority ofanother country to itlcntify and correct anunsufe condition on an aviation product. The MeAl descl'ihe~the unsaFe condition us: The munufactlirer has infonned Tmnsport C<lnada (hat acertain number of the resolver stators, wh.ich wer(',installed in the angle of tlltack (AOA) transducers, were notcleaned correctly, Thi~condition can degrade the ADA transducer perfonnance at low temperatures rc~uHinginfreezing of the ADA lrlmsducer resolver, which may provide inuccurate AOA claLaIII the Stall Protection System (SPS), Ifnotcorrected, this condilion can rel>ultillearly or latc activation of the I>lickf>hakerand/or stick pusher. These conditiolJs could result ill reduced ability ofthe flight crew 10lJiaintain asafe flight and lunding ofthe airplane, Theproposed AD would require actions that are intended to address lhe unsafe condilion described inthe MeAL -

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