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DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CFR Part 39 

# 0&4.3 I . [Docket No. FAA-2010-*****; Directorate Identifier 2010-NM-030-ADI RlN 2120-AA64 Airworthiness Directives; Bombardier, Lnc.Model DHC-8 Airplanes AGENCY: Federal Aviation Administration (l;AA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for the products listed above. This proposed AD results [rom mandatory continuing airworthiness information (MeAl) originated byan aviation autbority of another country to identify and correct an unsafe condition on an aviation product. The MeAl describes the unsafe condition as:

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IN!1"AI'wSIG The landing gear altemate extension system in the cockpit is accessible through an access panel located on the dockpit floor. There have been reports of failure ofthe access pancllalth assembly as aconsequence of repeated closure ofthe access panel invplving the use ofexcessive force. Failure of the latch assembly can result ~nthe access panel beingjammed in the closed position, and require mecHanical prying to open. An undetected or uncorrected latch failLe condition in the access panel can prevent immediate access to the landing gear alternate extension system by the flight crew during an emergency. 

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DATES: We must receive conunents on this proposed AD by [lNSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. described in the MeAl. The proposed AD would require actions that are intended to address the unsafe conditioto~CUR NC"S 

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ANE-171 OEPARTMENT OF TRANSPORT AnON Federal Aviation Administration 14CFR ParI 39 (Docket No. FAA-2010-*****; Directorate Identifier 2010-NM-030-AD] RIN 2120-AA64 Airworthiness Directives; Bombardier, Inc. Model DHC-8 Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed 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 information (MeAl) originated byanaviation autllOrityofanother country to identify and correct an unsafe condition on an aviation product. The MeAl describes the unsafe condition as: The landing gear alternate extension system inthe cockpit isaccessible through anaccess panel located on the cockpit 'floor.There have been 

### , reports offailure ofthe access panellalch assembly as aconsequence of repeated closure ofthe access panel inv91vingthe LIse ofexcessive force. Failure ofthe latch assembly canresult inthe access panel beingjammed inthe closed position, andrequire mechJnical prying to open. An undetected or uncorrected latch failJe condition inthe access panel can prevent immediate access tothe landing gear alternate extension system by the flight crew during an emergency. 

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## * The proposed AD would require actions that arc intended to address the unsafe condition described inthe MeAl. DATES: We must receive comments onthis proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. LOB-AEG

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