[4910-13-PJ

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

(Docket No. FAA-2010-0643; Directorate Identifier 2010-NM-030-ADj Amendme

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39-*****; AD 2010-**- *]

RJN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Model DHC~8 Airplanes

AGENCY: Federal Aviation Administration (FAA). Department of Transportation

(DOT).

ACTION: Final rule.

SUMMARY: We are adopting a new airworthiness directive (AD) for the products list

above. This AD results from mandatory continuing airworthiness infomlation (MeAl)

originated by an aviation authority of another country to identify and correct an unsafe

condition on an aviation product. The MeAL describes the unsafe condition as:

The landing gear-altemate extension SYStCtl1I11 the cockpit is accessible

through an access panel located on the bockpit floor. There have been

reports of failure of the access panel latch assembly as a consequence of

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

Failure of the latch assembly can resultlin the access panel beingjammed

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

An undetected or uncorrected latch failure condition in the access panel

can prevent immediate access to the landing gear alternate extension

system by the flight crew during an em~rgency. * * *

We are issuing this AD to require actions to correct the unsafe condition on these

products.

DATES: This AD becom" effective [INSERT DATE 35 DAYS AFTER DATE OF

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DEPARTMENT OF TRANSPORTATION

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ACTION: Final rule.

above. This AD results from mandatory continuing airwOlthiness information (MeAl)

originated by an aviation authority of another cbuntry to identify and caneel an unsafe

AGENCY: Federal Aviation Administration (FAA), Department of Transportation

I

SUMMARY: We are adopting a new airwOlihiness directive (AD) for the products listed

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 doekpit floor. There have been

reports of failure of the access panellat~h assembly as a consequence of

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

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

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

RO\JTIN()S~MltOl_

An undetected or uncorrected latch failure condition in the access panel

can prevent immediate access to the lan~ing gear alternate extension

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

We are issuing this AD to require actions to eol-eet the unsafe condition on these

lNII'IAL'IS'U

products.