14910-13-1') DEPARTMENT OFTRANSPORTATlQN n,n

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# i~01 IDocket No. FAA-2010-*****; Directorate Identifier 2010-NM-049-ADj



### CL-600-2B 16eeL-60 1-3A, CL-60 l-3R, and 

### CL-604 Variants) Airplanes Federal Aviation Administration

IUN 2120-AAG4

ACTION: Notice ofproposed ruJemaking (NPRM). Ainvorthincss Directives; Bomburdicr, Inc. Model CL-600-2A 12eeL-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 byan aviation ulItltl"'riiY of another country fOidentify _._


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

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### "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 atthp. design threshold" As a result, new Airworth-incss Limitation tasks, con~istiJlg ofa functional ·lestof the wing.lcauing edge thennal switches and an inspection of the wing anti-ice: duct piccolo tubes, have been introduced inorder to limit exposure to dc.r"lnLIH failure ofthe switches in the event ofpiccolo tube failure, which cOIildpotentially 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::;afecontliL)On described in the MeAl.(49IO-13-P) DEPARTMENT OF TRANSPORTATIQN Fcderal.'hiation Administration 14eFR 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 ""<VilA"""'" ""';S">:I>UI. l\N-PJ 

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### WIJ'''Ch"""," LGllJAEG 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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# ,;)3 / 0 ACTrON: Notice ofproposed rulemaking. (NPRM). 

### "'-""%$,.,.•••. ll. 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 inthe 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 ofthe wing IcaJing edge themlal switches and an inspection ofthe wing anti-ice duct piccolo tubes, have been introduced inorder to limit exposure to dorrnull failure orthe switches in the event ofpiccolo 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 byan aviation autlh,riiY of another country [0 identify

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