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CF·2009-46

TP 7245E

1/2

AIRWORTHINESS DIR

Issue Date

14 December 2009

The following airworthiness di'''''li"" lAD) may be aprlicabl~la an ai"""n whicl1 our records indicate i. registered in YOUf name. AD. are i.sued pursuant to ca"ad:an

Avi."ti"" R~g~lalio" (CAR) 521 Djyision X. Purs,uan 10Cil.1l605.84 ""d lhe f"rther details of CAR St;>nd.rd 625, "'pp~nd;•.H, lhe C<l~tinuinga;rworthioe.ss of a Ca~adian

'"illS"''''" alfcraft ISoont,ngent upon compl,ance wLlhall aPl'llcable AOs, FOllur. 10oomply With the reqUirements Df an AI;)ma1 ,"valldal~ 'ne ft;ght aUlho".allon of the aIrcraft

Altema,"e means of compliance shall be applied for in accordance wllh CAR 605,84and lhe aiO<lYl'-retereneed S",nd.rd,

This AD nas bo@n issued by the ContiMlng AirMJrthiness D1"i;.;on (AARDG), National Aircraft Certification Branch, Transport Can.Oa. Ottawa. telephone 613 S52 ..••357.

Number: CF- 2009-46

Subject: Landing Gear Alternate Extensior:'l Access Panel - Potential Failure to

Open

Effective: 7 January 2010

Applicability: Bombardier Inc. Model DHC-8 Aeroplanes, as follows:

DHC-8 Series 100, 200, and 300, wit~ serial numbers 003 through 658

DHC-8 Series 400, with serial numbers 4001, 4003, 4004, 4006, 4008 through

4187

Compliance: Within 6 000 hours airtime or three years, whichever comes first, from the

effective date of this Directive, unless 'already accomplished.

Note: The compliance times in this Directive differ from the recommended

compliance times mentioned in the Bombardier Service Bulletins (S8)

Background: 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 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 result in the access panel being iammed in the closed position, and require

mechanical prying to open I

An undetected or uncorrected latch ~ailure condition in the access panel can

prevent immediate access to the landing gear alternate extension system by the

flight crew during an emergency_ This Directive requires the replacement of the

existing latch assembly with a stronger modified latch assembly.

Corrective

Actions:

Within the compliance times specified in this Directive, replace the latch

assembly of the access panel for the landing gear alternate extension system as

follows:

Canada

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J~~f."cw:~~av~n~~~~~a:'dQ';,r;~:ri",,"'It;'~' ~~e8C~~i\~~~~~sS~s~wnicationS Cont", jAARC)

or WW'W, lC.go.oolci"; I,v"'tion/c<>mmunicaijans!contnli adcltl'SS.asp

1. For Model DHC-8 Series 100, 200, and 300 aeroplanes, in accordance with

Bombardier Service Bulletin 8-32(166 Revision A, dated January 29, 2009,

or later revisions approved by the Chief, Continuing Airworthiness,

Transport Canada Civil Aviation. I Compliance with the Initial Issue of this

Service Bulletin dated April 14, 2008 fulfills the requirement of this Directive

and no add,t,onal action is reqUi"r

Po","a"t to CAR 202.51 the registe",c owne, of a C~n.di." ~irc",ft ,hall. within s""en "ay., noti~ tile Minister

in writing of any chanse ofni. Orhe' name or a""reSS_ '

2"-00:<2 (01-2005)
I

No, CF~2009-46

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2. For Model DHC-8 Series 400 ae~oplanes, in accordance with Bombardier

Service Bulletin 84-32-57 Revision A, dated June 15, 2009, or later

revisions approved by the ehler, Continuing Airworthiness, Transport

Canada Civil Aviation. complia~ce with the Initial Issue of this Service

Bulletin dated April 30, 2008 fulfills the requirement of this Directive and no

additional action is required.

Authorization: For Minister of Transport, Infrastructure and Communities

ORIGINAL SIGNED BY

Contact:

Derek Ferguson

Chief, Continuing Airworthiness

Mr. Eric S. Lucas, Continuing Airworthiness, Ottawa, telephone 613-952-4357,

facsimile 613-996-9178 or e-mail fJ:,AW WEB Feedback@tc.Qc.ca or any

Transport Canada Centre.