```

[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]

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

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 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 W12-140, 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: http://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 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: 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 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

    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
```