
[Federal Register: November 17, 2008 (Volume 73, Number 222)]
[Proposed Rules]               
[Page 67820-67823]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr17no08-31]                         

-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-1216; Directorate Identifier 2008-NM-111-AD]
RIN 2120-AA64

 
Airworthiness Directives; Bombardier Model CL-600-1A11 (CL-600), 
CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-
604) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above. This proposed 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:

    * * * [S]everal cases of wing anti-ice piccolo duct failure 
reported on CL-600-2B19 (CRJ) aircraft. Although there have been no 
failures reported on Challenger aircraft, similar ducts are 
installed on the above Challenger models.
* * * * *
    Cracking of the wing anti-ice piccolo ducts could result in air 
leakage, with an adverse effect on the anti-ice air distribution 
pattern and a possible unannunciated insufficient heat condition. * 
* *

The unsafe condition is anti-ice system air leakage with a possible 
adverse effect on the anti-ice air distribution pattern and anti-ice 
capability without annunciation to the flightcrew, and consequent 
reduced controllability of the airplane. The proposed AD would require 
actions that are intended to address the unsafe condition described in 
the MCAI.

DATES: We must receive comments on this proposed AD by December 17, 
2008.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://
www.regulations.gov. Follow the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New 
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.

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 this proposed AD, 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.

FOR FURTHER INFORMATION CONTACT: Dan Parrillo, Aerospace Engineer, 
Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7305; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2008-1216; 
Directorate Identifier 2008-NM-111-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://
www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2008-18, dated May 9, 2008 (referred to after this as ``the MCAI''), to 
correct an unsafe condition for the specified products. The MCAI 
states:

    There have been several cases of wing anti-ice piccolo duct 
failure reported on CL-600-2B19 (CRJ) aircraft. Although there have 
been no failures reported on Challenger aircraft, similar ducts are 
installed on the above Challenger models [CL-600-1A11, CL-600-2A12, 
and CL-600-2B16].
    Upon investigation, it has been determined that ducts 
manufactured since June 2000, and installed since 1 August 2000, are 
susceptible to cracking due to the process used to drill the holes 
in the ducts. These ducts were installed on CL-600-2B16 aircraft, 
serial numbers 5469 through 5635 in production, but may also have 
been installed as replacements on CL-600-1A11, CL-600-2A12 and other 
CL-600-2B16 aircraft.
    Cracking of the wing anti-ice piccolo ducts could result in air 
leakage, with an adverse effect on the anti-ice air distribution 
pattern and a possible unannunciated insufficient heat condition. As 
a result, the airplane flight manual (AFM) instructions have been 
revised to provide proper annunciation of an insufficient heat 
condition, utilizing existing messages and indications, with 
instructions, to the pilot, to leave icing conditions if

[[Page 67821]]

sufficient heat cannot be achieved or maintained.
    This directive mandates the amendment of the AFM procedures, in 
addition to checking the part numbers and serial numbers of the 
installed wing anti-ice piccolo ducts and replacing them as 
necessary.

The unsafe condition is anti-ice system air leakage with a possible 
adverse effect on the anti-ice air distribution pattern and anti-ice 
capability without annunciation to the flightcrew, and consequent 
reduced controllability of the airplane. You may obtain further 
information by examining the MCAI in the AD docket.

Relevant Service Information

    Bombardier has issued the service information listed in the 
``Temporary Revisions (TRs)'' and ``Service Bulletins'' tables. The 
actions described in this service information are intended to correct 
the unsafe condition identified in the MCAI.

                                            Temporary Revisions (TRs)
----------------------------------------------------------------------------------------------------------------
            Canadair TR--                           To the--                              Date--
----------------------------------------------------------------------------------------------------------------
600/23...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        1A11 Airplane Flight Manual
                                        (AFM).
600-1/19.............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        1A11 (Winglets) AFM.
601/14...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM, Product Support
                                        Publication (PSP) 601-1B-1.
601/15...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM, PSP 601-1A-1.
601/19...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM, PSP 601-1B.
601/26...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2B16 AFM, PSP 601A-1.
601/27...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM.
601/27...............................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2B16 AFM, PSP 601A-1-1.
604/20...............................  Canadair Challenger Model CL-604   April 17, 2006.
                                        AFM, PSP 604-1.
----------------------------------------------------------------------------------------------------------------


                                                Service Bulletins
----------------------------------------------------------------------------------------------------------------
      Bombardier Service Bulletin--              Revision level--                         Date--
----------------------------------------------------------------------------------------------------------------
600-0734.................................  Original....................  November 30, 2006.
601-0585.................................  Original....................  November 30, 2006.
604-30-003...............................  01..........................  January 21, 2008.
----------------------------------------------------------------------------------------------------------------

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

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 proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a Note within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 108 products of U.S. registry. We also estimate that 
it would take about 37 work-hours per product to comply with the basic 
requirements of this proposed AD. The average labor rate is $80 per 
work-hour. Based on these figures, we estimate the cost of the proposed 
AD on U.S. operators to be $319,680, or $2,960 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

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 this proposed 
regulation:
    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.

List of Subjects in 14 CFR Part 39

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

[[Page 67822]]

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13  [Amended]

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

Bombardier, Inc. (Formerly Canadair): Docket No. FAA-2008-1216; 
Directorate Identifier 2008-NM-111-AD.

Comments Due Date

    (a) We must receive comments by December 17, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to the airplanes identified in Table 1, 
paragraphs (c)(1), (c)(2), (c)(3), and (c)(4) of this AD, 
certificated in any category.

                 Table 1--Airplanes Affected by This AD
------------------------------------------------------------------------
             Bombardier model                        Serial Nos.
------------------------------------------------------------------------
(1) CL-600-1A11 (CL-600) airplanes........  1004 through 1085 inclusive.
(2) CL-600-2A12 (CL-601) airplanes........  3001 through 3066 inclusive.
(3) CL-600-2B16 (CL-601-3A, CL-601-3R, &    5001 through 5194 inclusive.
 CL-604) airplanes.
(4) CL-600-2B16 (CL-601-3A, CL-601-3R, &    5301 through 5635 inclusive.
 CL-604) airplanes.
------------------------------------------------------------------------

Subject

    (d) Air Transport Association (ATA) of America Code 30: Ice and 
Rain Protection.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    There have been several cases of wing anti-ice piccolo duct 
failure reported on CL-600-2B19 (CRJ) aircraft. Although there have 
been no failures reported on Challenger aircraft, similar ducts are 
installed on the above Challenger models.
    Upon investigation, it has been determined that ducts 
manufactured since June 2000, and installed since 1 August 2000, are 
susceptible to cracking due to the process used to drill the holes 
in the ducts. These ducts were installed on CL-600-2B16 aircraft, 
serial numbers 5469 through 5635 in production, but may also have 
been installed as replacements on CL-600-1A11, CL-600-2A12 and other 
CL-600-2B16 aircraft.
    Cracking of the wing anti-ice piccolo ducts could result in air 
leakage, with an adverse effect on the anti-ice air distribution 
pattern and a possible unannunciated insufficient heat condition. As 
a result, the airplane flight manual (AFM) instructions have been 
revised to provide proper annunciation of an insufficient heat 
condition, utilizing existing messages and indications, with 
instructions, to the pilot, to leave icing conditions if sufficient 
heat cannot be achieved or maintained.
    This directive mandates the amendment of the AFM procedures, in 
addition to checking the part numbers and serial numbers of the 
installed wing anti-ice piccolo ducts and replacing them as 
necessary.

The unsafe condition is anti-ice system air leakage with a possible 
adverse effect on the anti-ice air distribution pattern and anti-ice 
capability without annunciation to the flightcrew, and consequent 
reduced controllability of the airplane.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) For airplanes identified in paragraphs (c)(1), (c)(2), 
(c)(3), and (c)(4) of this AD: Within 30 days after the effective 
date of this AD, revise the Normal and Abnormal Procedures sections 
of the Airplane Flight Manual (AFM) by inserting a copy of the 
applicable Temporary Revision (TR) listed in Table 2 of this AD. 
When the information in the applicable TR is included in the general 
revisions of the AFM, the general revisions may be inserted in the 
AFM and the TR may be removed.

                                          Table 2--Temporary Revisions
----------------------------------------------------------------------------------------------------------------
            Canadair TR--                           To the--                              Date--
----------------------------------------------------------------------------------------------------------------
(i) 600/23...........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        1A11 Airplane Flight Manual
                                        (AFM).
(ii) 600-1/19........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        1A11 (Winglets) AFM.
(iii) 601/14.........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM, Product Support
                                        Publication (PSP) 601-1B-1.
(iv) 601/15..........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM, PSP 601-1A-1.
(v) 601/19...........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM, PSP 601-1B.
(vi) 601/26..........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2B16 AFM, PSP 601A-1.
(vii) 601/27.........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2A12 AFM.
(viii) 601/27........................  Canadair Challenger Model CL-600-  August 16, 2006.
                                        2B16 AFM, PSP 601A-1-1.
(ix) 604/20..........................  Canadair Challenger Model CL-604   April 17, 2006.
                                        AFM, PSP 604-1.
----------------------------------------------------------------------------------------------------------------

    (2) For airplanes identified in paragraphs (c)(1), (c)(2), and 
(c)(3) of this AD, and for Model CL-600-2B16 (CL-601-3A, CL-601-3R, 
& CL-604) airplanes, serial numbers 5301 through 5468 inclusive: 
Prior to the accumulation of 2,000 total flight hours, or within 60 
months after the effective date of this AD, whichever occurs first, 
review the airplane maintenance records to determine if any anti-ice 
piccolo ducts or complete leading edge sections were replaced since 
August 1, 2000.
    (3) For airplanes identified in paragraphs (c)(1), (c)(2), and 
(c)(3) of this AD, and for Model CL-600-2B16 (CL-601-3A, CL-601-3R, 
& CL-604) airplanes, serial numbers 5301 through 5468 inclusive: If, 
during the action required by paragraph (f)(2) of this AD, it is 
determined that any anti-ice piccolo duct has been replaced since 
August 1, 2000, before further flight do a visual inspection to 
determine if any affected serial number is installed as identified 
in paragraph 2.C. of the applicable service bulletin identified in 
Table 3 of this AD. A review of airplane maintenance records is 
acceptable in lieu of this inspection if the serial number of the 
duct can be conclusively determined from that review. If any 
affected serial number is installed, before further flight replace 
the piccolo duct with a serviceable piccolo duct that does not have 
a serial number identified in paragraph 2.C. of the applicable 
service bulletin identified in Table 3 of this AD. Do all actions in 
accordance with the Accomplishment Instructions of the applicable 
service bulletin listed in Table 3 of this AD.

[[Page 67823]]



                                           Table 3--Service Bulletins
----------------------------------------------------------------------------------------------------------------
                                           Bombardier
                Model--                      service           Revision level--                 Date--
                                           bulletin--
----------------------------------------------------------------------------------------------------------------
(i) CL-600-1A11 (CL-600) airplanes.....        600-0734  Original...................  November 30, 2006.
(ii) CL-600-2A12 (CL-601) airplanes....        601-0585  Original...................  November 30, 2006.
(iii) CL-600-2B16 (CL-601-3A, CL-601-          601-0585  Original...................  November 30, 2006.
 3R) airplanes.
(iv) CL-600-2B16 (CL-604) airplanes....      604-30-003  01.........................  January 21, 2008.
----------------------------------------------------------------------------------------------------------------

    (4) For Model CL-600-2B16 (CL-601-3A, CL-601-3R, & CL-604) 
airplanes, serial numbers 5469 through 5635 inclusive: Prior to the 
accumulation of 2,000 total flight hours, or within 60 months after 
the effective date of this AD, whichever occurs first, do a visual 
inspection of the anti-ice piccolo ducts to determine if any 
affected serial number identified in paragraph 2.C. of the 
Bombardier Service Bulletin 604-30-003, Revision 01, dated January 
21, 2008 (``the service bulletin''), is installed. If any affected 
serial number is installed, before further flight replace the 
piccolo duct with a serviceable piccolo duct that does not have a 
serial number identified in paragraph 2.C. of the service bulletin. 
Do all actions in accordance with the Accomplishment Instructions of 
the service bulletin.
    (5) As of the effective date of this AD, no person may install 
on any airplane an anti-ice piccolo duct with a serial number 
identified in paragraph 2.C. of the applicable service bulletin 
identified in Table 3 of this AD.
    (6) Actions done before the effective date of this AD in 
accordance with Bombardier Service Bulletin 604-30-003, dated 
November 30, 2006, are acceptable for compliance with the 
corresponding actions in this AD.

FAA AD Differences

    Note 1: This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (g) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York Aircraft Certification Office, FAA, has the authority to 
approve AMOCs for this AD, if requested using the procedures found 
in 14 CFR 39.19. Send information to ATTN: Dan Parrillo, Aerospace 
Engineer, Airframe and Propulsion Branch, ANE-171, FAA, New York 
Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, 
Westbury, New York 11590; telephone (516) 228-7305; fax (516) 794-
5531. Before using any approved AMOC on any airplane to which the 
AMOC applies, notify your appropriate principal inspector (PI) in 
the FAA Flight Standards District Office (FSDO), or lacking a PI, 
your local FSDO.
    (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.
    (3) Reporting Requirements: For any reporting requirement in 
this AD, under the provisions of the Paperwork Reduction Act, the 
Office of Management and Budget (OMB) has approved the information 
collection requirements and has assigned OMB Control Number 2120-
0056.

Related Information

    (h) Refer to MCAI Canadian Airworthiness Directive CF-2008-18, 
dated May 9, 2008, and the service information identified in Table 2 
and Table 3 of this AD, for related information.

    Issued in Renton, Washington, on November 6, 2008.
Stephen P. Boyd,
Assistant Manager, Transport Airplane Directorate, Aircraft 
Certification Service.
[FR Doc. E8-27162 Filed 11-14-08; 8:45 am]

BILLING CODE 4910-13-P
