14 CFR Part 39

FAA Form '350·14.1 (5-89)

[4910-13-

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

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DDD~

[Docket No. FAA-2010-*****; Directorate Identifier 2010-NM-042-AD)

RlN 2120-AA64

Airworthiness Directives; Bombardier, Inc. M0del DHC-8-300 Series Airplanes

AGENCY: Federal Aviation Administration (FtA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

listed above. This proposed AD results from mfdatOry continuing airworthiness

information (MeAl) originated by an aviation arhoritY of a.nother c~untry to identify

and correct an unsafe condition on an aviation product. The MeAl describes the unsafe

condition as:

Several cases of aileron terminal quadrant support brackets that were

manufactured using sheet metal have be~n found cracked on DHC-8

Series 300 aircraft. Investigation revealed that the failure of the support

bracket was due to fatigue. Failure of the I aileron terminal quadrant support

bracket could result in an adverse reduction of aircraft roll control.

These conditions could result in loss of control of the airplane. The proposed AD would

require actions that are intended to address the lsafe condition described in the MCAI.

DATES: We must receive comments on this pr1posed AD by [INSERT DATE 45

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

ADDRESSES: You may send comments by ffi11 of the following methods:

• Federal eRulemaking Portal: Go to j:llwww.regulations.gov. Follow the

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-*****; Directorate Identifier 2010-NM-042-ADj

Airworthiness Directives; Bombardier, Inc. Moael DHC-8-300 Series Airplanes

AGENCY: F~deral Aviation Administration (Fk), DOT.

I

ACTION: Notice of proposed rulemaking (NPRr).

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

listed above. This proposed AD results from mi~atory continuing airworthiness

information (MeAl) originated by an aviation aurority of another country to identify

and correct an unsafe condition on an aviation pr duct. The MeAl describes the unsafe

condition as:

Several cases of aileron terminal quadrant support brackets that were

. I

manufactured using sheet metal have bee~ found cracked on DHC-8

Series 300 aircraft. Investigation revealedjthat the failure of the support

bracket was due to fatigue. Failure of the aileron terminal quadrant support

bracket could result in an adverse reductil" of aircraft roll control.

These conditions could result in loss of control of the airplane. The proposed AD would

require actions that are intended to address the uJSafe condition described in the MCAI.

DATES: We must receive comments on this protosed AD by [INSERT DATE 45

DAYS AFTER DATE OF PUBUCATION IN T E FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

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