
[Federal Register Volume 79, Number 41 (Monday, March 3, 2014)]
[Rules and Regulations]
[Pages 11691-11693]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-03825]



[[Page 11691]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0687; Directorate Identifier 2012-NM-118-AD; 
Amendment 39-17767; AD 2014-04-08]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. 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 all 
Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) 
airplanes. This AD was prompted by reports of burr marks on the primary 
wheels, and cracked rings on the primary wheel shaft, on certain 
horizontal stabilizer trim actuators (HSTAs). This AD requires 
replacing certain HSTAs. We are issuing this AD to prevent burr marks 
on the primary wheels, and cracked rings on the primary wheel shaft, on 
certain HSTAs, which may lead to a disconnect of the pitch trim surface 
and subsequent loss of pitch control, resulting in loss of control of 
the airplane.

DATES: This AD becomes effective April 7, 2014.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of April 7, 
2014.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2013-0687; or in person at the 
Docket Management Facility, U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC.
    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; email 
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You 
may view this referenced service information at the FAA, Transport 
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information 
on the availability of this material at the FAA, call 425-227-1221.

FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury, 
NY 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 by adding an AD that would apply to all Bombardier, Inc. Model 
CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. The NPRM 
published in the Federal Register on August 13, 2013 (78 FR 49227). The 
NPRM was prompted by reports of burr marks on the primary wheels, and 
cracked rings on the primary wheel shaft, on certain HSTAs. The NPRM 
proposed to require replacing certain HSTAs. We are issuing this AD to 
prevent burr marks on the primary wheels, and cracked rings on the 
primary wheel shaft, on certain HSTAs, which may lead to a disconnect 
of the pitch trim surface and subsequent loss of pitch control, 
resulting in loss of control of the airplane.
    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2012-18, dated May 29, 2012 (referred to after this as the Mandatory 
Continuing Airworthiness Information, or ``the MCAI''), to correct an 
unsafe condition for the specified products. The MCAI states:

    It was discovered that a number of primary wheels on the HSTA P/
N [part number] 601R92305-5 (or vendor P/N 8396-4) had burr marks. 
Investigation revealed that the burr marks were a result of 
incorrectly using the manufacturing process. In addition, some rings 
that were fitted on the primary wheel shaft were found cracked. If 
not corrected, this condition may lead to a disconnect of the pitch 
trim surface and subsequent loss of pitch control.
    This [Canadian] AD mandates the removal of the affected units 
that have the above described manufacturing defect.

Corrective actions include replacement of certain HSTAs. You may 
examine the MCAI in the AD docket on the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2013-0687-0003.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We have considered the comment received. The following 
presents the comment received on the proposal (78 FR 49227, August 13, 
2013) and the FAA's response to the comment.

Request To Revise the Applicability

    Air Wisconsin Airlines requested that we limit the applicability of 
the NPRM (78 FR 49227, August 13, 2013) to Model CL-6-2B19 (Regional 
Jet Series 100 & 440) airplanes ``equipped with HSTAs having part 
number (P/N) 601R92305-5 or vendor P/N 8396-4, with serial numbers (S/
N)s as identified in paragraph (g) of this AD.''
    We disagree with the commenter's request. The intent of the 
applicability in the NPRM (78 FR 49227, August 13, 2013) and this final 
rule was to capture all possible airplanes that could have an affected 
HSTA, or on which an affected HSTA could be installed in the future. 
This issue was coordinated with TCCA.
    The parts installation limitation, which applies to all Model CL-
600-2B19 (Regional Jet Series 100 & 440) airplanes, is retained in this 
final rule. This provision matches the intent of Canadian AD CF-2012-
18, dated May 29, 2012. We have made no changes to this final rule in 
this regard.
    Also, we have specified serial numbers 7003 and subsequent (which 
includes all serial numbers) in paragraph (c) in this final rule, which 
corresponds with the Applicability of Canadian AD CF-2012-18, dated May 
29, 2012.

Conclusion

    We reviewed the relevant data, considered the comment received, and 
determined that air safety and the public interest require adopting 
this AD as proposed except for minor editorial changes. We have 
determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM (78 FR 49227, August 13, 2013) for correcting the unsafe 
condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM (78 FR 49227, August 13, 2013).

Costs of Compliance

    We estimate that this AD affects 575 airplanes of U.S. registry.
    We also estimate that it will take about 19 work-hours per product 
to comply with the basic requirements of this AD. The average labor 
rate is $85 per work-hour. Required parts will cost about $0 per 
product. Based on these figures, we estimate the cost of this AD on 
U.S. operators to be $928,625, or $1,615 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

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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 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);
    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.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2013-0687; or in person at the 
Docket Management Facility between 9 a.m. and 5 p.m., Monday through 
Friday, except Federal holidays. The AD docket contains this 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.

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.


Sec.  39.13  [Amended]

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

2014-04-08 Bombardier, Inc.: Amendment 39-17767. Docket No. FAA-
2013-0687; Directorate Identifier 2012-NM-118-AD.

(a) Effective Date

    This airworthiness directive (AD) becomes effective April 7, 
2014.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Bombardier, Inc. Model CL-600-2B19 
(Regional Jet Series 100 & 440) airplanes, certificated in any 
category, serial numbers 7003 and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 27, Flight 
Controls.

(e) Reason

    This AD was prompted by reports of burr marks on the primary 
wheels, and cracked rings on the primary wheel shaft, on certain 
horizontal stabilizer trim actuators (HSTAs). We are issuing this AD 
to prevent burr marks on the primary wheels, and cracked rings on 
the primary wheel shaft, on certain HSTAs, which may lead to a 
disconnect of the pitch trim surface and subsequent loss of pitch 
control, resulting in loss of control of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Inspection

    Within 1,000 flight hours or 4 months after the effective date 
of this AD, whichever occurs first, inspect to determine if any HSTA 
having part number (P/N) 601R92305-5 or vendor P/N 8396-4, with 
serial numbers (S/N)s 287, 724, 813, 841, 998, 1031, 1035, 1049, 
1053, 1067, 1068, 1136, 1252, 1268, 1303, 1319, 1338, 1354, 1374, 
1378, 1445, 1470, 1498, 1513, 1546, 1632, 1736, 1766, 1846, 1849, 
2002 through 2009, 2011, 2013 through 2016, 2019, 2020, and 2022 is 
installed. A review of airplane maintenance records is acceptable in 
lieu of this inspection if the part number of the HSTA can be 
conclusively determined from that review.

(h) Replacement

    Within 1,000 flight hours or 4 months after the effective date 
of this AD, whichever occurs first, replace any affected HSTA 
identified in paragraph (g) of this AD with a serviceable HSTA, in 
accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 601R-27-159, dated June 15, 2011.

(i) Parts Installation Limitations

    As of the effective date of this AD, no person may install any 
HSTA having P/N 601R92305-5 or vendor P/N 8396-4 with a serial 
number listed in paragraph (g) of this AD, unless the serial number 
has the suffix ``A'' beside it.

(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 ACO, send it to ATTN: Program Manager, Continuing 
Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 
410, Westbury, NY 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 Mandatory Continuing Airworthiness Information Canadian 
Airworthiness Directive CF-2012-18, dated May 29, 2012, for related 
information. This MCAI may be found in the AD docket on the Internet 
at http://www.regulations.gov/#!documentDetail;D=FAA-2013-0687-0003.

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) Bombardier Service Bulletin 601R-27-159, dated June 15, 
2011.
    (ii) Reserved.
    (3) 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; email thd.crj@aero.bombardier.com; Internet http://www.bombardier.com.
    (4) You may view this service information at the FAA, Transport 
Airplane Directorate,

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1601 Lind Avenue SW., Renton, WA. For information on the 
availability of this material at the FAA, call 425-227-1221.
    (5) You may view this 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/cfr/ibr-locations.html.

    Issued in Renton, Washington, on February 10, 2014.
Jeffrey E. Duven,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2014-03825 Filed 2-28-14; 8:45 am]
BILLING CODE 4910-13-P


