
[Federal Register Volume 78, Number 161 (Tuesday, August 20, 2013)]
[Unknown Section]
[Pages 51055-51058]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-20109]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2013-0367; Directorate Identifier 2012-NM-177-AD; 
Amendment 39-17546; AD 2013-16-08]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Bombardier, Inc. 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. This AD was 
prompted by a report of corrosion of the components of the main landing 
gear (MLG) retraction actuator found in service; the corrosion was 
found at the interface of the rod end and the piston, and at the 
bracket and related pins. This AD requires inspection of the MLG 
retraction actuator components; corrective actions if necessary; and, 
for certain retraction actuators, installation of a new jam nut. We are 
issuing this AD to prevent disconnection of the MLG retraction 
actuator, which could result in extension of the MLG without damping, 
and consequent structural damage and collapse of the MLG during 
landing.

DATES: This AD is effective September 24, 2013.

[[Page 51056]]

    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the AD as of September 24, 
2013.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at U.S. Department of Transportation, 
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 
New Jersey Avenue SE., Washington, DC 20590.

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. 
The NPRM published in the Federal Register on May 10, 2013 (78 FR 
27318). The NPRM proposed to correct an unsafe condition for the 
specified products.
    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2011-36R1, dated October 3, 2012, the Mandatory Continuing 
Airworthiness Information (MCAI), to correct an unsafe condition for 
the specified products. The MCAI states:

    Corrosion of the main landing gear (MLG) retraction actuator 
components was found in-service, either at the interface of the rod 
end and the piston or at the bracket and its related pins. This can 
cause the MLG retraction actuator to disconnect, leading to an MLG 
extension without damping, and a potential for MLG structural damage 
and possible collapse during landing.
    This [Canadian] AD mandates the inspection and rectification 
[corrective action] of the MLG retraction actuator components.
    This revision is to mandate [, for certain MLG retraction 
actuators,] the installation of the new retraction actuator jam nut. 
This revision also corrects the background information and updates 
Service Bulletin (SB) references.

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 (78 FR 27318, May 10, 
2013) or on the determination of the cost to the public.

Conclusion

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

Costs of Compliance

    Based on the service information, we estimate that this AD affects 
about 391 products of U.S. registry. We also estimate that it takes up 
to 16 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 $1,018 per product. Where the service information lists 
required parts costs that are covered under warranty, we have assumed 
that there will be no charge for these parts. As we do not control 
warranty coverage for affected parties, some parties may incur costs 
higher than estimated here. Based on these figures, we estimate the 
cost of this AD on U.S. operators to be up to $929,798, or up to $2,378 
per product.
    We have received no definitive data that would enable us to provide 
cost estimates for the on-condition actions specified in this AD.

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 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 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 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 this AD, the MCAI, 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 airworthiness 
directive (AD):

2013-16-08 Bombardier, Inc.: Amendment 39-17546; Docket No. FAA-
2013-0367; Directorate Identifier 2012-NM-177-AD.

(a) Effective Date

    This AD becomes effective September 24, 2013.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to the airplanes specified in paragraphs (c)(1) 
and (c)(2) of this AD, certificated in any category.
    (1) Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 
701, & 702) airplanes, serial numbers 10002 and subsequent.

[[Page 51057]]

    (2) Bombardier, Inc. Model CL-600-2D15 (Regional Jet Series 705) 
and CL-600-2D24 (Regional Jet Series 900) airplanes, serial numbers 
15001 and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 32: Landing 
gear.

(e) Reason

    This AD was prompted by a report of corrosion of the components 
of the main landing gear (MLG) retraction actuator found in service; 
the corrosion was found at the interface of the rod end and the 
piston, and at the bracket and related pins. We are issuing this AD 
to prevent disconnection of the MLG retraction actuator, which could 
result in extension of the MLG without damping, and consequent 
structural damage and collapse of the MLG during landing.

(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) Inspection of the MLG Retraction Actuator and Corrective Actions

    For any airplane with an MLG retraction actuator assembly having 
any part number and serial number identified in paragraph 1.A., 
Effectivity, of Bombardier Service Bulletin 670BA-32-031, Revision 
C, dated April 17, 2012, except airplanes on which modification 
status ``32-64'' is marked on the identification plate: At the 
applicable time specified in paragraph (g)(1) or (g)(2) of this AD, 
perform a detailed inspection of the retraction actuator assembly 
for evidence of corrosion and security of the jam nut, as 
applicable, in accordance with Part A of the Accomplishment 
Instructions of Bombardier Service Bulletin 670BA-32-031, Revision 
C, dated April 17, 2012; and Goodrich Service Bulletin 49600-32-63 
R1, dated May 17, 2011. If any corrosion or unsecured jam nut is 
found, before further flight, replace the retract actuator with a 
new or serviceable retract actuator; and install the retract 
actuator in accordance with Part A of the Accomplishment 
Instructions of Bombardier Service Bulletin 670BA-32-031, Revision 
C, dated April 17, 2012. Repeat the inspection at intervals not to 
exceed 1,200 flight hours or 12 months, whichever occurs first.
    (1) For MLG retraction actuator assemblies on which, as of the 
effective date of this AD, 8,000 or more total flight hours have 
accumulated since new or since overhaul, or have been in service for 
more than 4 years since new or since overhaul: Inspect within 1,200 
flight hours or 12 months after the effective date of this AD, 
whichever occurs first.
    (2) For MLG retraction actuator assemblies on which, as of the 
effective date of this AD, less than 8,000 total flight hours have 
accumulated since new or since overhaul, and have been in service 
for 4 years or less since new or since overhaul: Inspect before the 
accumulation of 9,200 total flight hours on the MLG retraction 
actuator assembly since new or since overhaul or within 5 years in 
service since new or since overhaul, whichever occurs first.

(h) Inspection of MLG Retraction Actuator Bracket and Related Pins, and 
Corrective Actions

    For any airplane with an MLG dressed shock strut having any part 
number and serial number identified in paragraph 1.A., Effectivity, 
of Bombardier Service Bulletin 670BA-32-033, Revision B, dated June 
26, 2012: Within 4,400 flight hours or 24 months after the effective 
date of this AD, whichever occurs first, perform a detailed 
inspection of the retract actuator bracket assembly, associated 
pins, and the mating lugs on the outer cylinder for evidence of 
corrosion, in accordance with Bombardier Service Bulletin 670BA-32-
033, Revision B, dated June 26, 2012; and Goodrich Service Bulletin 
49000-32-46 R2, dated November 11, 2011. Do all applicable 
corrective actions before further flight (i.e., replace retract 
actuator bracket assembly and pins, or outer cylinder lugs, as 
applicable).

(i) Installation of New Jam Nut

    For any airplane with an MLG retraction actuator assembly having 
any part number and serial number identified in paragraph 1.A., 
Effectivity, of Bombardier Service Bulletin 670BA-32-031, Revision 
C, dated April 17, 2012, except airplanes on which modification 
status ``32-64'' is marked on the identification plate: Within 
20,000 flight hours or 10 years after the effective date of this AD, 
whichever occurs first, install a new jam nut having part number 
49606-5, in accordance with Part B of the Accomplishment 
Instructions of Bombardier Service Bulletin 670BA-32-031, Revision 
C, dated April 17, 2012; and Goodrich Service Bulletin 49600-32-64 
R3, dated December 15, 2011.

(j) Credit for Previous Actions

    (1) This paragraph provides credit for the actions required by 
paragraphs (g) and (i) of this AD, if those actions were performed 
before the effective date of this AD using the service information 
specified in paragraphs (j)(1)(i), (j)(1)(ii), or (j)(1)(iii) of 
this AD, which is not incorporated by reference in this AD.
    (i) Bombardier Service Bulletin 670BA-32-031, dated March 14, 
2011.
    (ii) Bombardier Service Bulletin 670BA-32-031, Revision A, dated 
June 9, 2011.
    (iii) Bombardier Service Bulletin 769BA-32-031, Revision B, 
dated July 29, 2011.
    (2) This paragraph provides credit for the actions required by 
paragraph (h) of this AD, if those actions were performed before the 
effective date of this AD using the service information specified in 
paragraph (j)(2)(i) or (j)(2)(ii) of this AD, which is not 
incorporated by reference in this AD.
    (i) Bombardier Service Bulletin 670BA-32-033, dated March 14, 
2011.
    (ii) Bombardier Service Bulletin 670BA-32-033, Revision A, dated 
July 29, 2011.

(k) Parts Installation Limitations

    (1) As of the effective date of this AD, no person may install 
on any airplane an MLG retraction actuator assembly having any part 
number and serial number identified in paragraph 1.A., Effectivity, 
of Bombardier Service Bulletin 670BA-32-031, Revision C, dated April 
17, 2012, unless that retraction actuator assembly has been 
inspected as specified in paragraph (g) of this AD, and all 
applicable corrective actions (i.e., replacement of the retract 
actuator) specified in paragraph (g) of this AD have been done. 
Repeat the inspection specified in paragraph (g) of this AD 
thereafter at the intervals specified in paragraph (g) of this AD.
    (2) As of the effective date of this AD, no person may install 
on any airplane an MLG retraction actuator assembly having any part 
number and serial number identified in paragraph 1.A., Effectivity, 
of Bombardier Service Bulletin 670BA-32-033, Revision B, dated June 
26, 2012, unless that retraction actuator assembly has been 
inspected and all applicable corrective actions have been done, in 
accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 670BA-32-033, Revision B, dated June 26, 2012.

(l) 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, 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.

(m) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
Canadian Airworthiness Directive CF-2011-36R1, dated October 3, 
2012, for related information, which can be found in the AD docket 
on the internet at http://www.regulations.gov.
    (2) Service information identified in this AD that is not 
incorporated by reference may be obtained at the address specified 
in paragraph (n)(3) of this AD.

(n) 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.

[[Page 51058]]

    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Bombardier Service Bulletin 670BA-32-031, Revision C, dated 
April 17, 2012.
    (ii) Bombardier Service Bulletin 670BA-32-033, Revision B, dated 
June 26, 2012.
    (iii) Goodrich Service Bulletin 49000-32-46 R2, dated November 
11, 2011.
    (iv) Goodrich Service Bulletin 49600-32-63 R1, dated May 17, 
2011.
    (v) Goodrich Service Bulletin 49600-32-64 R3, dated December 15, 
2011.
    (3) For Bombardier 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) For Goodrich service information identified in this AD, 
contact Goodrich Corporation, Landing Gear, 1400 South Service Road, 
West Oakville L6L 5Y7, Ontario, Canada; telephone 905-825-1568; 
email jean.breed@goodrich.com; Internet http://www.goodrich.com/TechPubs.
    (5) 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.
    (6) 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 July 31, 2013.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2013-20109 Filed 8-19-13; 8:45 am]
BILLING CODE 4910-13-P


