Airworthiness Directives; Bombardier, Inc. Airplanes, 23169-23171 [2012-9266]

Download as PDF Federal Register / Vol. 77, No. 75 / Wednesday, April 18, 2012 / Proposed Rules (2) 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. (i) Related Information For more information about this AD, contact Serj Harutunian, Aerospace Engineer, Propulsion Branch, ANM–140L, FAA, Los Angeles ACO, 3960 Paramount Boulevard, Lakewood, California 90712–4137; phone: 562–627–5254; fax: 562–627–5210; email: serj.harutunian@faa.gov. Issued in Renton, Washington, on April 6, 2012. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2012–9267 Filed 4–17–12; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2012–0335; Directorate Identifier 2011–NM–252–AD] RIN 2120–AA64 Airworthiness Directives; Bombardier, Inc. Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to revise an existing airworthiness directive (AD) that applies to certain Bombardier Model CL–600–2B19 (Regional Jet Series 100 & 440) airplanes; all Model CL–600–2C10 (Regional Jet Series 700, 701, & 702) airplanes; all Model CL– 600–2D15 (Regional Jet Series 705) airplanes; and all Model CL–600–2D24 (Regional Jet Series 900) airplanes. The existing AD currently requires replacing certain water accumulator assemblies having a certain part installed on the pitot and static lines of the air data computer (ADC). Since we issued that AD, an error was discovered in one service document number, and we have determined that credit for accomplishing actions in another erroneously cited service document should be removed from that AD. This proposed AD would correct the erroneous service document number and remove the other erroneously cited service document from that AD. We are proposing this AD to prevent pitot-static tubing from becoming partially or completely blocked by water, which could result in erroneous airspeed and mstockstill on DSK4VPTVN1PROD with PROPOSALS SUMMARY: VerDate Mar<15>2010 16:22 Apr 17, 2012 Jkt 226001 altitude indications and consequent loss of control of the airplane. DATES: We must receive comments on this proposed AD by June 4, 2012. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to https://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 W12–140, 1200 New Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Bombardier, ˆ Inc., 400 Cote-Vertu Road West, Dorval, ´ Quebec H4S 1Y9, Canada; phone: 514– 855–5000; fax: 514–855–7401; email: thd.crj@aero.bombardier.com; Internet: https://www.bombardier.com. You may review copies of the referenced 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. Examining the AD Docket You may examine the AD docket on the Internet at https:// 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: Cesar Gomez, Aerospace Engineer, Airframe & Mechanical Systems Branch, ANE–171, New York Aircraft Certification Office (ACO), FAA, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228– 7318; fax (516) 794–5531. SUPPLEMENTARY INFORMATION: 23169 FAA–2012–0335; Directorate Identifier 2011–NM–252–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 https:// 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 On September 28, 2011, we issued AD 2011–21–07, Amendment 39–16830 (76 FR 64801, October 19, 2011). That AD required actions intended to address an unsafe condition on the products listed above. Since we issued AD 2011–21–07, Amendment 39–16830 (76 FR 64801, October 19, 2011), an error was discovered in the document number specified in paragraph (i), ‘‘Credit for Actions Accomplished in Accordance with Previous Service Information,’’ of that AD. The citation in that paragraph should have read ‘‘Bombardier Service Bulletin 601R–34–147, Revision A, dated November 3, 2009.’’ Additionally, we have determined that ‘‘Bombardier Service Bulletin 670BA–34–147, dated April 1, 2009,’’ was incorrectly included in AD 2011–21–07 and should be removed from paragraph (i), ‘‘Credit for Actions Accomplished in Accordance with Previous Service Information,’’ of that AD. 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. 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. Costs of Compliance We estimate that this proposed AD affects 1,041 airplanes of U.S. registry. We estimate the following costs to comply with this proposed AD: PO 00000 Frm 00009 Fmt 4702 Sfmt 4702 E:\FR\FM\18APP1.SGM 18APP1 23170 Federal Register / Vol. 77, No. 75 / Wednesday, April 18, 2012 / Proposed Rules ESTIMATED COSTS Action Parts cost Labor cost Replacement [retained actions from AD 2011–21–07, Amendment 39–16830 (76 FR 64801, October 19, 2011)]. 2 work-hours × $85 per hour = $170. List of Subjects in 14 CFR Part 39 The new requirements of this proposed AD add no additional economic burden. Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 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. 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. § 39.13 [Amended] 2. The FAA amends § 39.13 by removing airworthiness directive (AD) 2011–21–07, Amendment 39–16830 (76 FR 64801, October 19, 2011), and adding the following new AD: Bombardier, Inc.: Docket No. FAA–2012– 0335; Directorate Identifier 2011–NM– 252–AD. mstockstill on DSK4VPTVN1PROD with PROPOSALS Regulatory Findings (a) Comments Due Date 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); 3. Will not affect intrastate aviation in Alaska; and 4. 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. We must receive comments by June 4, 2012. VerDate Mar<15>2010 16:22 Apr 17, 2012 Jkt 226001 (b) Affected ADs This AD revises AD 2011–21–07, Amendment 39–16830 (76 FR 64801, October 19, 2011). (c) Applicability This AD applies to Bombardier, Inc. Model CL–600–2B19 (Regional Jet Series 100 & 440) airplanes, serial numbers 7003 through 7067 inclusive, 7069 through 7990 inclusive, 8000 through 8107 inclusive, and subsequent; all Model CL–600–2C10 (Regional Jet Series 700, 701, & 702) airplanes; all Model CL–600– 2D15 (Regional Jet Series 705) airplanes; and all Model CL–600–2D24 (Regional Jet Series 900) airplanes; certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 34: Navigation. (e) Reason This AD was prompted by reports of airspeed mismatch between the pilot and copilot’s airspeed indicators. We are issuing this AD prevent pitot-static tubing from becoming partially or completely blocked by water, which could result in erroneous airspeed and altitude indications and consequent loss of control of the airplane. PO 00000 Frm 00010 Fmt 4702 Sfmt 4702 Cost per product Cost on U.S. operators $1,200 $1,370 $1,426,170 (f) Compliance You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. (g) Retained Replacement, With Corrections This paragraph restates the replacement required by paragraph (g) of AD 2011–21–07, Amendment 39–16830 (76 FR 64801, October 19, 2011), with corrections. Within 9 months after November 23, 2011 (the effective date of AD 2011–21–07), do the actions specified in paragraphs (g)(1) and (g)(2) of this AD, as applicable. (1) For Model CL–600–2B19 (Regional Jet Series 100 & 440) airplanes identified in Bombardier Service Bulletin 601R–34–147, Revision B, dated March 8, 2011: Replace water accumulator assemblies having part numbers (P/N) 50029–001, 9435015, 50030– 001, and 9435014 installed on the pitot and static lines of the air data computer (ADC) with new or serviceable water accumulator assemblies having P/N 50036–001, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 601R–34–147, Revision B, dated March 8, 2011. (2) For Model CL–600–2C10 (Regional Jet Series 700, 701, & 702), CL–600–2D15 (Regional Jet Series 705), and CL–600–2D24 (Regional Jet Series 900) airplanes: Replace water accumulator assemblies having P/N 50033–001 installed on the pitot and static lines of the ADC with new or serviceable water accumulator assemblies having P/N 50036–001, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA–34–030, Revision B, dated March 23, 2010. (h) Parts Installation As of November 23, 2011, no person may install on any airplane a water accumulator assembly, P/N 50029–001, 9435015, 50030– 001, or 9435014 for Model CL–600–2B19 (Regional Jet Series 100 & 440) airplanes; or P/N 50033–001 for Model CL–600–2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL–600–2D15 (Regional Jet Series 705) airplanes, and Model CL–600– 2D24 (Regional Jet Series 900) airplanes; on the pitot and static lines of the ADC. (i) Credit for Previous Actions (1) This paragraph provides credit for the replacement required by paragraph (g)(1) of this AD, if the replacement was performed before November 23, 2011, using Bombardier Service Bulletin 601R–34–147, Revision A, dated November 3, 2009 (for Model CL–600– 2B19 (Regional Jet Series 100 & 440) airplanes). (2) This paragraph provides credit for the replacement required by paragraph (g)(2) of this AD, if the replacement was performed E:\FR\FM\18APP1.SGM 18APP1 Federal Register / Vol. 77, No. 75 / Wednesday, April 18, 2012 / Proposed Rules before November 23, 2011, using Bombardier Service Bulletin 670BA–34–030, dated April 1, 2009; or Revision A, dated November 3, 2009 (for Model CL–600–2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL– 600–2D15 (Regional Jet Series 705) airplanes, and Model CL–600–2D24 (Regional Jet Series 900) airplanes). (j) Other FAA AD Provisions 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 manager of 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. (k) Related Information Refer to MCAI Canadian Airworthiness Directive CF–2010–37, dated October 28, 2010, and the following service information, for related information. (1) Bombardier Service Bulletin 601R–34– 147, Revision B, dated March 8, 2011. (2) Bombardier Service Bulletin 670BA– 34–030, Revision B, dated March 23, 2010. Issued in Renton, Washington, on April 6, 2012. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2012–9266 Filed 4–17–12; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION mstockstill on DSK4VPTVN1PROD with PROPOSALS Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2012–0196; Airspace Docket No. 12–AWP–2] Proposed Amendment of Class E Airspace; Fairfield, CA Federal Aviation Administration (FAA), DOT. AGENCY: VerDate Mar<15>2010 16:22 Apr 17, 2012 Jkt 226001 Notice of proposed rulemaking (NPRM). ACTION: This action proposes to amend Class E airspace at Travis Air Force Base (AFB), Fairfield, CA. The proposed decommissioning of the Travis VHF Omni-Directional Radio Range (VOR) has made this action necessary for the safety and management of Instrument Flight Rules (IFR) operations at the airport. DATES: Comments must be received on or before June 4, 2012. ADDRESSES: Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590; telephone (202) 366–9826. You must identify FAA Docket No. FAA–2012–0196; Airspace Docket No. 12–AWP–2, at the beginning of your comments. You may also submit comments through the Internet at https://www.regulations.gov. FOR FURTHER INFORMATION CONTACT: Eldon Taylor, Federal Aviation Administration, Operations Support Group, Western Service Center, 1601 Lind Avenue SW., Renton, WA 98057; telephone (425) 203–4537. SUPPLEMENTARY INFORMATION: SUMMARY: Comments Invited Interested parties are invited to participate in this proposed rulemaking by submitting such written data, views, or arguments, as they may desire. Comments that provide the factual basis supporting the views and suggestions presented are particularly helpful in developing reasoned regulatory decisions on the proposal. Comments are specifically invited on the overall regulatory, aeronautical, economic, environmental, and energy-related aspects of the proposal. Communications should identify both docket numbers (FAA Docket No. FAA 2012–0196 and Airspace Docket No. 12– AWP–2) and be submitted in triplicate to the Docket Management System (see ADDRESSES section for address and phone number). You may also submit comments through the Internet at https://www.regulations.gov. Commenters wishing the FAA to acknowledge receipt of their comments on this action must submit with those comments a self-addressed stamped postcard on which the following statement is made: ‘‘Comments to FAA Docket No. FAA–2012–0196 and Airspace Docket No. 12–AWP–2’’. The postcard will be date/time stamped and returned to the commenter. All communications received on or before the specified closing date for PO 00000 Frm 00011 Fmt 4702 Sfmt 4702 23171 comments will be considered before taking action on the proposed rule. The proposal contained in this action may be changed in light of comments received. All comments submitted will be available for examination in the public docket both before and after the closing date for comments. A report summarizing each substantive public contact with FAA personnel concerned with this rulemaking will be filed in the docket. Availability of NPRMs An electronic copy of this document may be downloaded through the Internet at https://www.regulations.gov. Recently published rulemaking documents can also be accessed through the FAA’s web page at https:// www.faa.gov/airports_airtraffic/ air_traffic/publications/ airspace_amendments/. You may review the public docket containing the proposal, any comments received, and any final disposition in person in the Dockets Office (see the ADDRESSES section for the address and phone number) between 9 a.m. and 5 p.m., Monday through Friday, except federal holidays. An informal docket may also be examined during normal business hours at the Northwest Mountain Regional Office of the Federal Aviation Administration, Air Traffic Organization, Western Service Center, Operations Support Group, 1601 Lind Avenue SW., Renton, WA 98057. Persons interested in being placed on a mailing list for future NPRMs should contact the FAA’s Office of Rulemaking, (202) 267–9677, for a copy of Advisory Circular No. 11–2A, Notice of Proposed Rulemaking Distribution System, which describes the application procedure. The Proposal The FAA is proposing an amendment to Title 14 Code of Federal Regulations (14 CFR) Part 71 by amending Class E airspace designated as an extension to class D surface area at Travis AFB, Fairfield, CA. Airspace reconfiguration is necessary due to the proposed decommissioning of the Travis VOR, and would enhance the safety and management of aircraft operations at the airport. Class E airspace designations are published in paragraph 6004, of FAA Order 7400.9V, dated August 9, 2011, and effective September 15, 2011, which is incorporated by reference in 14 CFR Part 71.1. The Class E airspace designation listed in this document will be published subsequently in this Order. The FAA has determined this proposed regulation only involves an E:\FR\FM\18APP1.SGM 18APP1

Agencies

[Federal Register Volume 77, Number 75 (Wednesday, April 18, 2012)]
[Proposed Rules]
[Pages 23169-23171]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-9266]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2012-0335; Directorate Identifier 2011-NM-252-AD]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to revise an existing airworthiness directive (AD) 
that applies to certain Bombardier Model CL-600-2B19 (Regional Jet 
Series 100 & 440) airplanes; all Model CL-600-2C10 (Regional Jet Series 
700, 701, & 702) airplanes; all Model CL-600-2D15 (Regional Jet Series 
705) airplanes; and all Model CL-600-2D24 (Regional Jet Series 900) 
airplanes. The existing AD currently requires replacing certain water 
accumulator assemblies having a certain part installed on the pitot and 
static lines of the air data computer (ADC). Since we issued that AD, 
an error was discovered in one service document number, and we have 
determined that credit for accomplishing actions in another erroneously 
cited service document should be removed from that AD. This proposed AD 
would correct the erroneous service document number and remove the 
other erroneously cited service document from that AD. We are proposing 
this AD to prevent pitot-static tubing from becoming partially or 
completely blocked by water, which could result in erroneous airspeed 
and altitude indications and consequent loss of control of the 
airplane.

DATES: We must receive comments on this proposed AD by June 4, 2012.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to https://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 W12-140, 1200 New 
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec 
H4S 1Y9, Canada; phone: 514-855-5000; fax: 514-855-7401; email: 
thd.crj@aero.bombardier.com; Internet: https://www.bombardier.com. You 
may review copies of the referenced 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.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://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: Cesar Gomez, Aerospace Engineer, 
Airframe & Mechanical Systems Branch, ANE-171, New York Aircraft 
Certification Office (ACO), FAA, 1600 Stewart Avenue, Suite 410, 
Westbury, New York 11590; telephone (516) 228-7318; 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-2012-0335; 
Directorate Identifier 2011-NM-252-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 https://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

    On September 28, 2011, we issued AD 2011-21-07, Amendment 39-16830 
(76 FR 64801, October 19, 2011). That AD required actions intended to 
address an unsafe condition on the products listed above.
    Since we issued AD 2011-21-07, Amendment 39-16830 (76 FR 64801, 
October 19, 2011), an error was discovered in the document number 
specified in paragraph (i), ``Credit for Actions Accomplished in 
Accordance with Previous Service Information,'' of that AD. The 
citation in that paragraph should have read ``Bombardier Service 
Bulletin 601R-34-147, Revision A, dated November 3, 2009.'' 
Additionally, we have determined that ``Bombardier Service Bulletin 
670BA-34-147, dated April 1, 2009,'' was incorrectly included in AD 
2011-21-07 and should be removed from paragraph (i), ``Credit for 
Actions Accomplished in Accordance with Previous Service Information,'' 
of that AD.

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.

Costs of Compliance

    We estimate that this proposed AD affects 1,041 airplanes of U.S. 
registry.
    We estimate the following costs to comply with this proposed AD:

[[Page 23170]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
               Action                        Labor cost           Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
Replacement [retained actions from    2 work-hours x $85 per           $1,200           $1,370       $1,426,170
 AD 2011-21-07, Amendment 39-16830     hour = $170.
 (76 FR 64801, October 19, 2011)].
----------------------------------------------------------------------------------------------------------------

    The new requirements of this proposed AD add no additional economic 
burden.

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);
    3. Will not affect intrastate aviation in Alaska; and
    4. 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.

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 removing airworthiness directive 
(AD) 2011-21-07, Amendment 39-16830 (76 FR 64801, October 19, 2011), 
and adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2012-0335; Directorate Identifier 
2011-NM-252-AD.

(a) Comments Due Date

    We must receive comments by June 4, 2012.

(b) Affected ADs

    This AD revises AD 2011-21-07, Amendment 39-16830 (76 FR 64801, 
October 19, 2011).

(c) Applicability

    This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional 
Jet Series 100 & 440) airplanes, serial numbers 7003 through 7067 
inclusive, 7069 through 7990 inclusive, 8000 through 8107 inclusive, 
and subsequent; all Model CL-600-2C10 (Regional Jet Series 700, 701, 
& 702) airplanes; all Model CL-600-2D15 (Regional Jet Series 705) 
airplanes; and all Model CL-600-2D24 (Regional Jet Series 900) 
airplanes; certificated in any category.

(d) Subject

    Air Transport Association (ATA) of America Code 34: Navigation.

(e) Reason

    This AD was prompted by reports of airspeed mismatch between the 
pilot and co-pilot's airspeed indicators. We are issuing this AD 
prevent pitot-static tubing from becoming partially or completely 
blocked by water, which could result in erroneous airspeed and 
altitude indications and consequent loss of control of the airplane.

(f) Compliance

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

(g) Retained Replacement, With Corrections

    This paragraph restates the replacement required by paragraph 
(g) of AD 2011-21-07, Amendment 39-16830 (76 FR 64801, October 19, 
2011), with corrections. Within 9 months after November 23, 2011 
(the effective date of AD 2011-21-07), do the actions specified in 
paragraphs (g)(1) and (g)(2) of this AD, as applicable.
    (1) For Model CL-600-2B19 (Regional Jet Series 100 & 440) 
airplanes identified in Bombardier Service Bulletin 601R-34-147, 
Revision B, dated March 8, 2011: Replace water accumulator 
assemblies having part numbers (P/N) 50029-001, 9435015, 50030-001, 
and 9435014 installed on the pitot and static lines of the air data 
computer (ADC) with new or serviceable water accumulator assemblies 
having P/N 50036-001, in accordance with the Accomplishment 
Instructions of Bombardier Service Bulletin 601R-34-147, Revision B, 
dated March 8, 2011.
    (2) For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), 
CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet 
Series 900) airplanes: Replace water accumulator assemblies having 
P/N 50033-001 installed on the pitot and static lines of the ADC 
with new or serviceable water accumulator assemblies having P/N 
50036-001, in accordance with the Accomplishment Instructions of 
Bombardier Service Bulletin 670BA-34-030, Revision B, dated March 
23, 2010.

(h) Parts Installation

    As of November 23, 2011, no person may install on any airplane a 
water accumulator assembly, P/N 50029-001, 9435015, 50030-001, or 
9435014 for Model CL-600-2B19 (Regional Jet Series 100 & 440) 
airplanes; or P/N 50033-001 for Model CL-600-2C10 (Regional Jet 
Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet 
Series 705) airplanes, and Model CL-600-2D24 (Regional Jet Series 
900) airplanes; on the pitot and static lines of the ADC.

(i) Credit for Previous Actions

    (1) This paragraph provides credit for the replacement required 
by paragraph (g)(1) of this AD, if the replacement was performed 
before November 23, 2011, using Bombardier Service Bulletin 601R-34-
147, Revision A, dated November 3, 2009 (for Model CL-600-2B19 
(Regional Jet Series 100 & 440) airplanes).
    (2) This paragraph provides credit for the replacement required 
by paragraph (g)(2) of this AD, if the replacement was performed

[[Page 23171]]

before November 23, 2011, using Bombardier Service Bulletin 670BA-
34-030, dated April 1, 2009; or Revision A, dated November 3, 2009 
(for Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, 
and Model CL-600-2D24 (Regional Jet Series 900) airplanes).

(j) Other FAA AD Provisions

    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 manager of 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.

(k) Related Information

    Refer to MCAI Canadian Airworthiness Directive CF-2010-37, dated 
October 28, 2010, and the following service information, for related 
information.
    (1) Bombardier Service Bulletin 601R-34-147, Revision B, dated 
March 8, 2011.
    (2) Bombardier Service Bulletin 670BA-34-030, Revision B, dated 
March 23, 2010.

    Issued in Renton, Washington, on April 6, 2012.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2012-9266 Filed 4-17-12; 8:45 am]
BILLING CODE 4910-13-P
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