
[Federal Register Volume 76, Number 136 (Friday, July 15, 2011)]
[Rules and Regulations]
[Pages 41653-41657]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-17402]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1307; Directorate Identifier 2010-NM-049-AD; 
Amendment 39-16671; AD 2011-09-09]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Model CL-600-2A12 (CL-
601) and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) 
Airplanes

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

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. This AD results from mandatory continuing 
airworthiness information (MCAI) originated by an aviation authority of 
another country to identify and correct an unsafe condition on an 
aviation product. The MCAI describes the unsafe condition as:

    During flight-testing of a wing anti-ice piccolo tube containing 
a deliberate small breach, it was determined that the wing leading 
edge thermal switches were not detecting the consequent bleed leak 
at the design threshold. As a result, new

[[Page 41654]]

Airworthiness Limitation tasks, consisting of a functional test of 
the wing leading edge thermal switches and an inspection of the wing 
anti-ice duct piccolo tubes, have been introduced in order to limit 
exposure to dormant failure of the 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.

We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective August 19, 2011.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of August 19, 
2011.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7318; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM was published in the Federal Register on January 5, 2011 (76 
FR 477). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    During flight-testing of a wing anti-ice piccolo tube containing 
a deliberate small breach, it was determined that the wing leading 
edge thermal switches were not detecting the consequent bleed leak 
at the design threshold. As a result, new Airworthiness Limitation 
tasks, consisting of a functional test of the wing leading edge 
thermal switches and an inspection of the wing anti-ice duct piccolo 
tubes, have been introduced in order to limit exposure to dormant 
failure of the 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. This 
directive mandates the revision of the approved maintenance schedule 
to include these new tasks, including phase-in schedules.
    This revision clarifies the applicability of the directive for 
CL-600-2A12 aircraft, serial numbers 3001 through 3066, and for CL-
600-2B16 aircraft, serial numbers 5001 through 5194. The directive 
is only applicable to these aircraft if Bombardier Service Bulletin 
(SB) 601-0590 [Scheduled Maintenance Instructions (MSG-3) Derived--
Qualification] has been incorporated. There is no change required to 
the approved maintenance schedule if SB 601-0590 has not been 
incorporated.

You may obtain further information by examining the MCAI in the AD 
docket.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM or on the determination of 
the cost to the public.

Conclusion

    We reviewed the available data and determined that air safety and 
the public interest require adopting the AD as proposed.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have required different actions in this AD from those 
in the MCAI in order to follow our FAA policies. Any such differences 
are highlighted in a NOTE within the AD.

Costs of Compliance

    We estimate that this AD will affect 103 products of U.S. registry. 
We also estimate that it will take about 1 work-hour per product to 
comply with the basic requirements of this AD. The average labor rate 
is $85 per work-hour. Based on these figures, we estimate the cost of 
this AD to the U.S. operators to be $8,755, or $85 per product.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains the NPRM, the regulatory evaluation, 
any comments received, and other information. The street address for 
the Docket Operations office (telephone (800) 647-5527) is in the 
ADDRESSES section. Comments will be available in the AD docket shortly 
after receipt.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


[[Page 41655]]




Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new AD:

2011-09-09 Bombardier, Inc.: Amendment 39-16671. Docket No. FAA-
2010-1307; Directorate Identifier 2010-NM-049-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective August 
19, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to the airplanes identified in paragraphs 
(c)(1), (c)(2), (c)(3), and (c)(4) of this AD; certificated in any 
category.
    (1) Bombardier, Inc. Model CL-600-2A12 (CL-601) airplanes, 
serial numbers 3001 through 3066 inclusive on which Bombardier 
Service Bulletin 601-0590 has been accomplished.
    (2) Bombardier, Inc. CL-600-2B16 (CL-601-3A and CL-601-3R 
Variants) airplanes, serial numbers 5001 through 5194 inclusive on 
which Bombardier Service Bulletin 601-0590 has been accomplished.
    (3) Bombardier, Inc. CL-600-2B16 (CL-604 Variants) airplanes, 
serial numbers 5301 through 5665 inclusive.
    (4) Bombardier, Inc. CL-600-2B16 (CL-604 Variants) airplanes, 
serial numbers 5701 and subsequent.

    Note 1: This AD requires revisions to certain operator 
maintenance documents to include new inspections. Compliance with 
these inspections is required by 14 CFR 91.403(c). For airplanes 
that have been previously modified, altered, or repaired in the 
areas addressed by these inspections, the operator may not be able 
to accomplish the inspections described in the revisions. In this 
situation, to comply with 14 CFR 91.403(c), the operator must 
request approval for an alternative method of compliance according 
to paragraph (j) of this AD. The request should include a 
description of changes to the required inspections that will ensure 
the continued operational safety of the airplane.

Subject

    (d) Air Transport Association (ATA) of America Codes 30 and 36: 
Ice and Rain Protection and Pneumatic, respectively.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:
    During flight-testing of a wing anti-ice piccolo tube containing 
a deliberate small breach, it was determined that the wing leading 
edge thermal switches were not detecting the consequent bleed leak 
at the design threshold. As a result, new Airworthiness Limitation 
tasks, consisting of a functional test of the wing leading edge 
thermal switches and an inspection of the wing anti-ice duct piccolo 
tubes, have been introduced in order to limit exposure to dormant 
failure of the 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.

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Actions

    (g) Within 30 days after the effective date of this AD: Revise 
the Airworthiness Limitations Section of the Instructions for 
Continued Airworthiness by incorporating the applicable tasks 
identified in table 1 of this AD.

                Table 1--Airworthiness Limitations Tasks
------------------------------------------------------------------------
                                      Incorporate
  For Bombardier, Inc. model--         task(s)--        Identified in--
------------------------------------------------------------------------
CL[dash]600[dash]2A12             30-11-00-101, Wing  Bombardier
 (CL[dash]601) airplanes, serial   Anti-icing, and     Challenger 601
 numbers 3001 through 3066         30-11-00-102,       Time Limits/
 inclusive on which Bombardier     Wing Anti-icing.    Maintenance
 Service Bulletin 601[dash]0590                        Checks, PSP 601-
 has been accomplished.                                5, Revision 38,
                                                       dated June 19,
                                                       2009.
CL[dash]600[dash]2B16             30-11-00-101, Wing  Bombardier
 (CL[dash]601[dash]3A and          Anti-icing, and     Challenger 601
 CL[dash]601[dash]3R Variants)     30-11-00-102,       Time Limits/
 airplanes, serial numbers 5001    Wing Anti-icing.    Maintenance
 through 5194 inclusive on which                       Checks, PSP 601A-
 Bombardier Service Bulletin 601-                      5, Revision 34,
 0590 has been accomplished.                           dated June 19,
                                                       2009.
CL-600-2B16 (CL-604 Variants)     30-11-00-101,       Bombardier
 airplanes, serial numbers 5301    Detailed            Challenger 604
 through 5665 inclusive.           Inspection of the   Time Limits/
                                   Wing Anti-Ice       Maintenance
                                   Duct Piccolo-       Checks, CH 604
                                   Tube, and           TLMC, Revision
                                   36[dash]21[dash]0   13, dated August
                                   0[dash]101,         12, 2009.
                                   Functional Test
                                   of the Leading
                                   Edge Thermal
                                   Switches.
CL-600-2B16 (CL-604 Variants)     30-11-00-101,       Bombardier
 airplanes, serial numbers 5701    Detailed            Challenger 605
 and subsequent.                   Inspection of the   Time Limits/
                                   Wing Anti-Ice       Maintenance
                                   Duct Piccolo-       Checks, CH 605
                                   Tube, and           TLMC, Revision 1,
                                   36[dash]21[dash]0   dated August 12,
                                   0[dash]101,         2009.
                                   Functional Test
                                   of the Leading
                                   Edge Thermal
                                   Switches.
------------------------------------------------------------------------

     (h) For all tasks identified in paragraph (g) of this AD, the 
initial compliance times for those tasks are within the applicable 
times specified in table 2 of this AD.

                      Table 2--Initial Compliance Times for Airworthiness Limitations Tasks
----------------------------------------------------------------------------------------------------------------
                                                                Initial compliance time
       Bombardier, Inc. model--               Task(s)--            (whichever occurs
                                                                        later)--
----------------------------------------------------------------------------------------------------------------
CL[dash]600[dash]2A12 (CL[dash]601)    30-11-00-101, Wing Anti- Prior to the             Within 240 flight hours
 airplanes, serial numbers 3001         icing.                   accumulation of 4,800    after the effective
 through 3066 inclusive; and                                     total flight hours; or   date of this AD.
 CL[dash]600[dash]2B16                                           within 4,800 flight
 (CL[dash]601[dash]3A and                                        hours after
 CL[dash]601[dash]3R Variants)                                   accomplishing Task
 airplanes, serial numbers 5001                                  30[dash]11[dash]06[das
 through 5194 inclusive; on which                                h]204 in Section
 Bombardier Service Bulletin 601-0590                            5[dash]20-15 of the
 has been accomplished.                                          applicable Time Limits/
                                                                 Maintenance Checks
                                                                 manual specified in
                                                                 table 1 of this AD;
                                                                 whichever occurs later.

[[Page 41656]]

 
CL[dash]600[dash]2A12 (CL[dash]601)    30-11-00-102, Wing Anti- Prior to the             Within 240 flight hours
 airplanes, serial numbers 3001         icing.                   accumulation of 4,800    after the effective
 through 3066 inclusive; and                                     total flight hours; or   date of this AD.
 CL[dash]600[dash]2B16                                           within 4,800 flight
 (CL[dash]601[dash]3A and                                        hours after
 CL[dash]601[dash]3R Variants)                                   accomplishing Task
 airplanes, serial numbers 5001                                  30[dash]13[dash]00[das
 through 5194 inclusive; on which                                h]205 in Section
 Bombardier Service Bulletin 601-0590                            5[dash]20-15 of the
 has been accomplished.                                          applicable Time Limits/
                                                                 Maintenance Checks
                                                                 manual specified in
                                                                 table 1 of this AD;
                                                                 whichever occurs later.
CL-600-2B16 (CL-604 Variants)          30-11-00-101, Detailed   Prior to the             Within 320 flight hours
 airplanes, serial numbers 5301         Inspection of the Wing   accumulation of 6,400    after the effective
 through 5665 inclusive.                Anti-Ice Duct Piccolo-   total flight hours;      date of this AD.
                                        Tube, and                except for airplanes
                                        36[dash]21[dash]00[das   having 6,400 total
                                        h]101, Functional Test   flight hours or more
                                        of the Leading Edge      as of the effective
                                        Thermal Switches.        date of this AD on
                                                                 which the task has not
                                                                 been accomplished:
                                                                 prior to the next
                                                                 scheduled 6,400 flight
                                                                 hour task inspection
                                                                 or prior to the next
                                                                 scheduled
                                                                 accomplishment of Task
                                                                 57[dash]10[dash]00-208
                                                                 in the applicable Time
                                                                 Limits/Maintenance
                                                                 Checks manual
                                                                 specified in table 1
                                                                 of this AD, whichever
                                                                 occurs first.
CL-600-2B16 (CL-604 Variants)          30-11-00-101, Detailed   Prior to the             Within 320 flight hours
 airplanes, serial numbers 5701 and     Inspection of the Wing   accumulation of 6,400    after the effective
 subsequent.                            Anti-Ice Duct Piccolo-   total flight hours.      date of this AD.
                                        Tube, and
                                        36[dash]21[dash]00[das
                                        h]101, Functional Test
                                        of the Leading Edge
                                        Thermal Switches.
----------------------------------------------------------------------------------------------------------------

    (i) After accomplishing the actions required by paragraph (g) of 
this AD, no alternative tasks or task intervals may be used unless 
the tasks or task intervals are approved as an alternative method of 
compliance (AMOC) in accordance with the procedures specified in 
paragraph (j)(1) of this AD.

FAA AD Differences

    Note 2: This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (j) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office (ACO), ANE-170, FAA, has the 
authority to approve AMOCs for this AD, if requested using the 
procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, 
send your request to your principal inspector or local Flight 
Standards District Office, as appropriate. If sending information 
directly to the ACO, send it to ATTN: Program Manager, Continuing 
Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 
410, Westbury, New York 11590; telephone 516-228-7300; fax 516-794-
5531. Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office. The AMOC approval letter must specifically 
reference this AD.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.

Related Information

    (k) Refer to MCAI Canadian Airworthiness Directive CF-2009-49R1, 
dated January 21, 2010, and the service information specified in 
Table 1 of this AD, for related information.

Material Incorporated by Reference

    (l) You must use the applicable service information contained in 
table 3 of this AD to do the actions required by this AD, unless the 
AD specifies otherwise.

               Table 3--Material Incorporated by Reference
------------------------------------------------------------------------
           Document               Revision                Date
------------------------------------------------------------------------
Tasks 30-11-00-101, Wing Anti-             38  June 19, 2009.
 icing, and 30-11-00-102,
 Wing Anti-icing, of the
 Bombardier Challenger 601
 Time Limits/Maintenance
 Checks, PSP 601-5.
Tasks 30-11-00-101, Wing Anti-             34  June 19, 2009.
 icing, and 30-11-00-102,
 Wing Anti-icing, of the
 Bombardier Challenger 601
 Time Limits/Maintenance
 Checks, PSP 601A-5.
Tasks 30-11-00-101, Detailed               13  August 12, 2009.
 Inspection of the Wing Anti-
 Ice Duct Piccolo-Tube, and
 36-21-00-101, Functional
 Test of the Leading Edge
 Thermal Switches, of the
 Bombardier Challenger 604
 Time Limits/Maintenance
 Checks, CH 604 TLMC.
Tasks 30-11-00-101, Detailed                1  August 12, 2009.
 Inspection of the Wing Anti-
 Ice Duct Piccolo-Tube, and
 36-21-00-101, Functional
 Test of the Leading Edge
 Thermal Switches, of the
 Bombardier Challenger 605
 Time Limits/Maintenance
 Checks, CH 605 TLMC.
------------------------------------------------------------------------


[[Page 41657]]

    The title pages of these documents do not indicate the revision 
level or issue date of the documents. Only the Record of Revisions 
of these documents contains the revision level of these documents.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-
7401; e-mail thd.crj@aero.bombardier.com; Internet http://www.bombardier.com.
    (3) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington. For information on the availability of this material at 
the FAA, call 425-227-1221.
    (4) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on April 13, 2011.
Ali Bahrami,
Manager,Transport Airplane Directorate,Aircraft Certification Service.

[FR Doc. 2011-17402 Filed 7-14-11; 8:45 am]
BILLING CODE 4910-13-P


