14910-13-1')

DEPARTMENT OF TRANSPORTATlQN

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IDocket No. FAA-2010-*****; Directorate Identifier 2010-NM-049-ADj

CL-600-2B 16 eeL-60 1-3A, CL-60 l-3R, and CL-604 Variants) Airplanes

Federal Aviation Administration

IUN 2120-AAG4

ACTION: Notice of proposed ruJemaking (NPRM).

Ainvorthincss Directives; Bomburdicr, Inc. Model CL-600-2A 12 eeL-60 1) and

AGENCY: Federul Aviation Administration (FAA), DOT.

SUMi\:IARY: We propose to adopt a new airworthinc$S directiv::: (1\0) for the products

listed above. This proposed AD results from mandatmy continuing airworthiness

Ai'll:· 171

inlormatioo (MeAl) originated by an aviation ulItltl"'riiYof another country fOidentify _._

- :;'~Ji.Wand correct an unsafe condition on an avi;:ltiol1produ',::t. The MeAl describes the ur:safe£1 :Z.' ~ ,r~

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condition as: "H''''~-

ANE·17f1

During night-testing ofu wing anti-ice pkcolo tube containing a

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

thermal switches were not detecting the tOl1scquent bleed leak at thp.

design threshold" As a result, new Airworth-incss Limitation tasks,

con~istiJlg ofa functional ·lest of the wing.lcauing edge thennal switches

and an inspection of the wing anti-ice: duct piccolo tubes, have been

introduced in order to limit exposure to dc.r"lnLIHfailure of the switches in

the event of piccolo tube failure, which cOIild potentially compromise the

s:truct1Jralintegrity orthe wing. leading edge and the cffecliveness of the

wing. nnti-icc system.

TlIe proposed AD would requirc aet!ons Ihat arc ~nlc:,dcd to addrcss lbe un::;afe contliL)On

described in the MeAl.
(49IO-13-P)

DEPARTMENT OF TRANSPORTATIQN

Fcderal.'hiation Administration

14 eFR ParI 39

[Docket No. FAA·2010-*****j Directoratc Identifier 2010-NM-049-ADJ

IUN 2120-AA64

Ain\'orthincss Directives; Bombardier, Inc. Mbdel CL-600-2AI2 (CL-601) and

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Cl-600-2B 16 (Cl-60 1-3A, CL-cO 1-3R, and CL-604 Vanants) Ai'l'lancs

AGENCY: Federal Aviation Administration (FAA), DOT.

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ACTrON: Notice of proposed rulemaking. (NPRM).

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ANE-!71

SUMIVIARY: We propose to adopt a new ain\:orlhine:is directiv,: (AD) for the products

lisled above. This proposed AD results from mandal.ory continuing airworthiness

described in the MeAl.

-111Cproposed AD would require aCl!OnSThat ar,;:illtc"ded to address the unsafe C0mELiOll

During llighHcsting ofa wing anti-ic~~piccolo tube containing a

deliberate small breach, it was determin~d that the wing leading edge

thermal switches were not detecting the consequent bleed leak al thl':

design threshold. As a result, new Airworthiness Limitation tasks,

consisting of a functional·test of the wing IcaJing edge themlal switches

and an inspection of the wing anti-ice duct piccolo tubes, have been

introduced in order to limit exposure to dorrnull failure orthe switches in

the event of piccolo tube failure, which cOI,ld rotcntiaUy compromise the

structural integrity of the ",ing leading edge ;md the effectiveness of the

\\ling. anti-ice system_

infoml(lti'::ll (MCAr) originated by an aviation autlh,riiY of another country [0 identify _

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amI correct an unsafe condition on an aviation prodU'.;t. The MeAl describes the ur.safcC-1~,r-~u tk:

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condItIOn as: ''l~''~-

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