Airworthiness Directives; Bombardier, Inc. Model CL-600-2B 19 (Regional Jet Series

14 CFR Part 39

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

11I3

IDocket No. FAA-2010-*****; Directorate Identifier 20IO-NM-I2I-ADJ

RIN 2120-AA64

100 & 440) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

14910-13-r

NL"URRENC1'S

.OlJI'ING ,YMOOL

A!r~ 1-

l~nl L',"~

(.G.&--

ATE

(, /'V71t~

10

A-;vr- - \0\

INlTIAt.5'SIG

~Ol1I'INGSn,OOL

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products ..Dr:JJ,fJI.- -1C6

listed above. This proposed AD results from mandatory continuing airworthiness

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

and COlTeel an unsafe condition on an aviation product. The MeAl describes the unsafe

condition as:

During flight-testing of a wing anti-ice piccolo tube containing a

deliberate small breach, itjwas determined that the wing leading edge

thermal switches Part Number (PIN) 601R59320-1 were not detecting the

consequent bleed leak at the design threshold. As a result, Airworthiness

Limitation (A WL) tasks, ¢onsisting of a functional check of the wing

leading edge thermal swit~hes (PIN 601R59320-1) and an inspection of

the wing anti-ice duct piccolo tubes on aeroplanes with these switches

installed, have been introduced. These tasks will limit exposure to dormant

failure of the wing leading edge thermal switches in the event of piccolo

tube failure, which could potentially compromise the structural integrity of

the wing leading edge and the effectiveness of the wing anti-ice system.

00 lNG:;'M~OL

'''T'Al'ISIG

Ifc,",,,", ----

INIII".s'SIG

Ifc'M""---~

* * * * * *

The proposed AD would require actions that are intended to address the unsafe conditionL _
14910-I3-P)

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 eFR Part 39

(Docket No. FAA-2010-"""***j Directorate Identifier 2010~NM-12I-AD)

RIN 2120-AA64

Ainvorthiness Directives; Bombardier, Inc. Model CL·600·2B 19 (Regional Jet Series

100 & 440) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

I

ACTION: Notice of proposed rulemaking (NPRM).

I

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

listed ahove. This proposed AD results from mandatory continuing airworthiness

information (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:

During flighHesling of a wing anti-ice piccolo tube containing a

deliberate small breach, it was determined that the wing leading edge

thermal switches Part Number (PIN) 601 R59320-1 were not detecting the

consequent bleed leak at the design tlweshold. As a result, Airworthiness

Limitation (AWL) tasks, consisting ofa functional check of the wing

leading edge thermal switches (PrN 601 R59320-1) and an inspection of

the wing anti-ice duct piccolo tubes on aeroplanes with these switches

installed, have been introduced. These tasks wi1l1imil exposure to donnanl

failure of the wing leading edge thermal switches in the event of piccolo

tube failure, which could potenti£llly compromise the structural integrity of

the wing leading edge and the effectiveness of the wing anti-ice system.

I

>I< * *1 * * * >I'

NITIALSlSfG

C G ez

ctm>'(;SYMBOL

LGB/AEG

~OUT,NG SYMUOI.

ANE-l71

IW'TIAI.S1S'G

''/!Y':Jf

'"irh.//(J

~~

ANE-171

'NITII\LSlSIG

The proposed AD would require actions that are intended to address the unsafe condition
14IJ/U-IJ·l'j

IlEI'i\RTMENT OF TRANSI'OHTATION

!

Federal Aviatioll Admillistnltinn

,'J,,""""""U.;:--·

,Wi""'''''''','''' 1\1-;1',1'1'\

---_ ,,' ..,..,

""-""",'."

,\)1\jIN

,14CFH. Part39

I

IDoc!{e1' No. FAA-20III-if""""""; Diredurate Identifier 2010~NI\1.121~AJ)1

I

H1N2120-AAC,<.. I . . . . .

AlI'worthmcss Dln'lCI1VCs; BOIll1JI1l'l!ICt·, Inc. Model C.1.-600~2Bl () (Rt:gJonul Jcl ~encs

100 & 440) Airpltlll(':c;

AGENCY: r:CdCl'lll Aviulioll l\.(liiillisl]"ll[iOn (FAA), DOT.

ACTION: Notice of pm posed l"lllbnaking (NPRtv.l).

I

SUMMAH.Y; We propose to adopt <1new llil'wonhiness direclive (.'\ OJ 101'thL' pr()c1u<:l"

listed above. This propose-cll\D ,'cLulls (i·om 1I1and810l"Ycontinuing ,ljnv()l'thinc~s

!

\llro]"lll<ltioll (MeAl) l1rigimllcd b~all ,lvi;\tion llnLllorily l1fnnoiher calm!!'y to idcniify

Hnd L'OITce[an unsnfc condition or] an tlvialion proc!ut:1. 'The. MC!\l ul.':>erib(~s lIw \lll:';:-lic

l:onuj(iOll ,I.';]:

DtIl'ing flight-tesLing of n ~·ing <lnll-ice piccolo t Llbc cOl1tail1lJ1g n

delibcrntu small breach, i[ wns dctormineclthal the wing kiltJill[i tuge

thennill switches Pflrt Number (PIN) 601R59J20-1 w~~ren01 d(!lecling lhe

l:on:-\~qucl1l bleed ic,l1c al tHe design Lhreshold i\S a result, /\irwonhine.';~:

Lilll ihltioll (/\ W L) til.sk:;, wn:;isling or a fum: [jolwl cheek ()r the wi ng

lending edge lhcrmal switches (PiN 60 IRS9J20-1) ~md an in~pec!ioll 01'

the wing anti-ice duct piccolo tubes on acrophmc~ wilh \llC's0 .';wj[ch,~~

in<ilUlJcd, have been intrm.luccd. These 'L,)~k::; will limil exposure ltl dormant

J11iILll"Coethe wing knding-edge thcrtnal switches inlhc CV(~I1[ oi·piecolo

lube fllilun:, whio.:h could potentially COmpl"Olll:SC [he siruclurnlllllegri\y ul"

Lhe wing lending edge <lnd Ithe ellcc:tivclless of' the wing nnli~icu sy::;lt:fll_

'<iWi';;;C~-

,,\~E"i?1

,';.;-"1'",,,,,---

I) 1'""ill"

------ ''''''''"';'''''''''',

';"i;:i;~:"ir'--

..\ I':,1L.

~~;","'--

,\NI.'-I"IIi

";{T,iT~l[;----

..\, ~;"ci",

._-~-------"".-- ".01.

•

,

The prnpo.'lc(l I\D would require ndions Ihm Hn.~inlclldcd 10 address the lJnsalu Go])dillUrJ