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AGENCY: Federal Aviation Administration (FAA), DOT.

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ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new airwJrthiness directive (AD) for the products

listed above. This proposed AD results from mldatOry continuing airworthiness

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

and correct an unsafe condition on an aviation pi oduct. The MeAl describes the unsafe I AT'

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(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

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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 a certain number of

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the resolver stators, which were installeq in the angle of attack (AOA)

transducers, were not cleaned correctlY'lfhis condition can degrade the

ADA transducer performance at low 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 of the stick shaker and/or stick pusher.

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These conditions could result in reduced ability of the flight crew to maintain a safe fligh

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and landing of the airplane. The proposed AD would require actions that are intended to om

address the tmsafe condition described in the 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

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information (MeAl) originated by an aviation authority of another country to identify J. ~I+

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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 MeAl.

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[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. ModeJ Cl.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 a new airworthiness directive (AD) lor the products

listed above. This proposed AD results from mandatory continuing ,airworthiness

informalion (MeAl) originated by an aviation authority of another country to itlcntify

and correct an unsufe condition on an aviation product. The MeAl descl'ihe~ the unsaFe

condition us:

The munufactlirer has infonned Tmnsport C<lnada (hat a certain number of

the resolver stators, wh.ich wer(', installed in the angle of tlltack (AOA)

transducers, were not cleaned correctly, Thi~ condition can degrade the

ADA transducer perfonnance at low temperatures rc~uHing in freezing of

the ADA lrlmsducer resolver, which may provide inuccurate AOA claLaIII

the Stall Protection System (SPS), If not corrected, this condilion can

rel>ult ill early or latc activation of the I>lickf>haker and/or stick pusher.

These conditiolJs could result ill reduced ability of the flight crew 10lJiaintain a safe flight

and lunding of the airplane, The proposed AD would require actions that are intended to

address lhe unsafe condilion described in the MeAL

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