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DEI'AtHMKi'\T OF TRANSPORTATION

Fcdl'raJ Aviatillll Administration

14 CFH. P"rt 39

\Docket No. FAA-201 0-0276; Dircc1tlrlltc Identifier 2009-NM-.I44~AJ); Amendment

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3 ~*"*"*; AD 2011.I~H_**1

IUN 2120-AA64

Airworthiness .oil·cctivcs; BombardiL'l", Inc. Model CL-600-2l:J 19 (Regional .let SCI'ies

100 & 440) /\irplanes

AGENCY: Federal Aviation Administralion (FAA), f)CP[lfllllClli ofTnmsportatinn

(00'1).

ACTION: Fin;,) rule.

SUMMAnv: We are superseding <111 existing ain.•.•onhincss dircctin: (AD) tor {he

prodm:1S llstcd above. This AD results Irom mandatory continuing. airworthiness

in!i.)J']nati()1l(MeA!) originated by an avialion authority of anoth,,;l' count ry to iden!i fy

and correct:ln tlllsalC condition on allllvialioll product. The MeA! describes \he ut1:>ufc

tonditiOI1 ,1S:

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Three cases or in-l1ight loss of etlbin pressurization bave been reponed,

resulting from failure of a bulkhcad check valve in combination wiLh

raitun.: of an air supply ducL

In audilion 10 mandating inspecljoll. rework and/or rc:plal:cmcnt tll"the air

supply dUCIS, Ainvol1hiness Directive (AD) Cf-200)-OS (subsequently

revised to CF-2003-05RI) lwhich corresponds to FAA AI) 2004-22-08]

lUnlldu!ed the incorporation of a 4000 mght-hour repetiti ve inspection task

for hulkhead eheek valves. Part Numbers (PiN) 92E20-3 and 92E20-4,

inll}lhe approved maintenance schedule. However, this repetilive

Inspection task has since heen superseded by <l 3000 flighl-hour periodic
[491Q-13-P)

DEPARTMENT OF TRAi\lSPORT AnON

Federal Aviation Administration

14 CFR Part 39

(Docket No. FAA-2010-0276; Directorate Identifier 2009-NM-144-AD; Amendme

39-*****' ,AD. 2010-**-**]

RIN 2120-AA64

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Airwortbiness Directives; Bombardier, Inc. Model CL-600-28 19 (Regional Jet Series RO\n'lNCsnIflOt

100 & 440) Airplanes

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

(DOT).

ACTION: Final rule.

SUMMARY: We are superseding an existing airworthiness directive (AD) for the

products listed above. This AD results from mandatory continuing airworthiness

infonnation (MeAl) originated by an aviation authority of another country to identify IlATE

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

condition as:

Three cases of in-flight loss of cabin pressurization have been reported,

resulting from failure of a bulkhead check valve in combination with

failure of an air supply duct.

In addition to mandating inspection, rework and/or replacement of the air

supply ducts, Airworthiness Directive (AD) CF-2003-05 (subsequently

revised to CF-2003-05RI) [which corresponds 10 FAA AD 2004-22-08]

mandated the incorporation of a 4000 flight-hour repetitive inspection task

for bulkhead check valves, Part Numbers (PIN) 92E20-3 and 92E20-4,

into the approved maintenance schedule. However, this repetitive

inspection task has since been superseded by a 3000 flight~hour periodic

discard task for these bulkhead check valves.

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