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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR 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 of proposed rulemaking (NPRM).

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

listed above. This proposed AD results [rom mandatory continuing airworthiness

information (MeAl) originated by an 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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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 of the access pancllalth assembly as a consequence of

repeated closure of the access panel invplving the use of excessive force.

Failure of the latch assembly can result ~n the 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. * * *

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 conditio
to~CUR NC"S

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ANE-171

OEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14 CFR 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 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

information (MeAl) originated by an aviation autllOrity of another 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 in the cockpit is accessible

through an access panel located on the cockpit 'floor. There have been ,

reports of failure of the access panellalch assembly as a consequence of

repeated closure of the access panel inv91ving the LIseof excessive force.

Failure of the latch assembly can result in the access panel being jammed

in the closed position, and require mechJnical prying to open.

An undetected or uncorrected latch failJe condition in the access panel

can prevent immediate access to the landing gear alternate extension

system by the flight crew during an emergency. * * *

The proposed AD would require actions that arc intended to address the unsafe condition

described in the MeAl.

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

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

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