[Federal Register Volume 77, Number 211 (Wednesday, October 31, 2012)]
[Rules and Regulations]
[Pages 65810-65812]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2012-26088]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2012-0592; Directorate Identifier 2011-NM-253-AD;
Amendment 39-17230 AD 2012-21-14]
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 superseding an existing airworthiness directive (AD)
for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100
& 440) airplanes. That AD currently requires a one-time inspection of
the shafts of the main landing gear (MLG) side-brace fittings to detect
corrosion, and the forward and aft bushings in the left-hand and right-
hand MLG side-brace fittings to detect discrepancies. The existing AD
also requires corrective and related actions if necessary. This new AD
requires repetitive detailed inspections for corrosion and damage of
the MLG side-brace fitting, and replacing the side-brace fitting shaft
with the re-designed side-brace fitting shaft of the MLG if necessary.
This AD also requires eventual replacement of certain side-brace
fitting shafts with the re-designed part. Replacement with a re-
designed side-brace fitting shaft of the MLG is terminating action for
the repetitive inspections. This AD was prompted by reports of failure
of the side-brace fitting shaft of the main landing gear (MLG) due to
corrosion. We are issuing this AD to prevent fractures of the side-
brace fitting shafts of the MLG, and possible collapse of the MLG.
DATES: This AD becomes effective December 5, 2012.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of December 5,
2012.
ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC.
FOR FURTHER INFORMATION CONTACT: Jeffrey Zimmer, 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) 228-7306; 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.
That NPRM was published in the Federal Register on June 12, 2012 (77 FR
34870), and proposed to supersede AD 2004-22-23, Amendment 39-13851 (69
FR 64856, November 9, 2004). That NPRM proposed to correct an unsafe
condition for the specified products. The MCAI states:
Due to the failure of the main landing gear (MLG) side brace
fitting shaft, caused by corrosion, [Transport Canada Civil Aviation
(TCCA)] Airworthiness Directive (AD) CF-2002-41 was issued to
require inspection and
[[Page 65811]]
if needed, parts replacement. However, the existing MLG side-brace
fitting shafts continued to fail. Failure of the MLG side brace
fitting shaft could result in the collapse of the main landing gear.
This [TCCA] directive mandates the repetitive detailed visual
inspection [for cracking and corrosion] of the MLG side brace
fitting and the incorporation of the re-designed MLG side brace
fitting shaft part number (P/N) 601R10247-3 as the terminating
action.
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 considered the comment received.
Request to Reference Revised Service Bulletin
Comair, Inc. requested that we allow the use of Bombardier Service
Bulletin 601R-57-052, Revision A, dated October 28, 2011, in the AD.
Comair, Inc. provided no reasons for the request.
We agree to reference the most recent service information.
Bombardier, Inc. has issued Service Bulletin 601R-57-052, Revision A,
dated October 28, 2011. This service bulletin includes editorial
changes, but does not add work for airplanes that have done the actions
using Bombardier Service Bulletin 601R-57-052, dated July 28, 2011
(which was referenced to as the appropriate source of service
information in the NPRM (77 FR 34870, June 12, 2012). Therefore we have
revised paragraphs (g)(1), (g)(2), (h)(1), and (h)(2) of this AD to
refer to Bombardier Service Bulletin 601R-57-052, Revision A, dated
October 28, 2011. We have also added paragraph (i) to this AD to allow
credit for actions performed before the effective date of this AD using
Bombardier Service Bulletin 601R-57-052, dated July 28, 2011. We have
re-designated subsequent paragraphs accordingly.
Conclusion
We reviewed the available data, including the comment received, and
determined that air safety and the public interest require adopting the
AD with the changes described previously and except for minor editorial
changes. We have determined that these changes:
Are consistent with the intent that was proposed in the
NPRM (77 FR 34870, June 12, 2012) for correcting the unsafe condition;
and
Do not add any additional burden upon the public than was
already proposed in the NPRM (77 FR 34870, June 12, 2012).
Costs of Compliance
We estimate that this AD will affect about 584 products of U.S.
registry.
We estimate that it will take about 10 work-hours per product to
comply with the new basic requirements of this AD. The average labor
rate is $85 per work-hour. Required parts will cost about $0 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 to the
U.S. operators to be $496,400, or $850 per product.
In addition, we estimate that any necessary follow-on actions would
take about 14 work-hours and require parts costing $3,860, for a cost
of $5,050 per product. We have no way of determining the number of
products that may need these actions.
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 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 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 the NPRM (77 FR 34870, June 12, 2012),
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.
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 removing airworthiness directive (AD)
2004-22-23, Amendment 39-13851 (69 FR 64856, November 9, 2004), and
adding the following new AD:
2012-21-14 Bombardier, Inc.: Amendment 39-17230. Docket No. FAA-
2012-0592; Directorate Identifier 2011-NM-253-AD.
(a) Effective Date
This airworthiness directive (AD) becomes effective December 5,
2012.
(b) Affected ADs
This AD supersedes AD 2004-22-23, Amendment 39-13851 (69 FR
64856, November 9, 2004).
(c) Applicability
This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional
Jet Series 100 & 440) airplanes; certificated in any category;
serial numbers 7003 through 7990 inclusive, and 8000 through 8999
inclusive.
[[Page 65812]]
(d) Subject
Air Transport Association (ATA) of America Code 57: Wings.
(e) Reason
This AD was prompted by reports of failure of the side-brace
fitting shaft of the main landing gear (MLG) due to corrosion. We
are issuing this AD to prevent fractures of the side-brace fitting
shafts of the MLG, and possible collapse of the MLG.
(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 MLG Side-Brace Fitting Shaft and Replacement
(1) At the applicable times specified in paragraphs (g)(1)(i),
(g)(1)(ii), (g)(1)(iii), and (g)(1)(iv) of this AD, do a detailed
inspection for corrosion and damage of each side-brace fitting shaft
of the MLG, in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 601R-57-052, Revision A, dated October
28, 2011. Repeat the inspections at the applicable times specified
in paragraphs (g)(1)(i), (g)(1)(ii), (g)(1)(iii), and (g)(1)(iv) of
this AD.
(i) For airplanes that average greater than 900 flight hours per
year and have side-brace shafts part number (P/N) 601R10237-1
installed in either the left- or right-hand MLG, or if the side-
brace shaft part number cannot be identified without removal: Within
1,000 flight hours after the effective date of this AD, do the
inspection. Repeat the inspections thereafter at intervals not to
exceed 1,000 flight hours until the replacement specified in
paragraph (g)(2) or (h) of this AD is done.
(ii) For airplanes that average 900 flight hours or less per
year and have side-brace shafts P/N 601R10237-1 installed on either
the left- or right-hand MLG, or if the side-brace shaft part number
cannot be identified without removal: Within 18 months after the
effective date of this AD, do the inspection. Repeat the inspections
thereafter at intervals not to exceed 18 months until the
replacement specified in paragraph (g)(2) or (h) of this AD is done.
(iii) For airplanes that average greater than 900 flight hours
per year and have side-brace shafts P/N 601R10237-3 installed on
either the left- or right-hand MLG: Within 36 months after the
effective date of this AD, do the inspection. Repeat the inspections
thereafter at intervals not to exceed 36 months until the
replacement specified in paragraph (g)(2) or (h) of this AD is done.
(iv) For airplanes that average 900 flight hours or less per
year and have side-brace shafts P/N 601R10237-3 installed on either
the left- or right-hand MLG: Within 60 months after the effective
date of this AD, do the inspection. Repeat the inspections
thereafter at intervals not to exceed 60 months until the
replacement specified in paragraph (g)(2) or (h) of this AD is done.
(2) If any corrosion or damage is found during any inspection
required by paragraph (g) of this AD: Before further flight, replace
the side-brace fitting shaft with a new shaft P/N 601R10247-3, in
accordance with the Accomplishment Instructions of Bombardier
Service Bulletin 601R-57-052, Revision A, dated October 28, 2011.
Doing this replacement terminates the inspection requirements of
paragraph (g) of this AD.
(h) Replacement
Do the replacement at the applicable time specified in paragraph
(h)(1) or (h)(2) of this AD.
(1) For any airplanes that have side-brace shafts P/N 601R10237-
1 installed, or if the side-brace shaft part number cannot be
identified without removal: Within 27 months after the effective
date of this AD, replace the side-brace fitting shaft of the MLG
with a new shaft having P/N 601R10247-3, in accordance with the
Accomplishment Instructions of Bombardier Service Bulletin 601R-57-
052, Revision A, dated October 28, 2011. Doing this replacement
terminates the inspection requirements of paragraph (g) of this AD.
(2) For airplanes that have side-brace shafts P/N 601R10237-3
installed: Within 117 months after the effective date of this AD,
replace the side-brace fitting shaft of the MLG with a new shaft P/N
601R10247-3, in accordance with the Accomplishment Instructions of
Bombardier Service Bulletin 601R-57-052, Revision A, dated October
28, 2011. Doing this replacement terminates the inspection
requirements of paragraph (g) of this AD.
(i) Credit for Previous Actions
This paragraph provides credit for the actions specified in
paragraphs (g) and (h) of this AD, if those actions were performed
before the effective date of this AD using Bombardier Service
Bulletin 601R-57-052, dated July 28, 2011 (which is not incorporated
by reference in this AD).
(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, 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-2011-39, dated
October 25, 2011; and Bombardier Service Bulletin 601R-57-052, dated
July 28, 2011; for related information.
(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 the AD specifies otherwise.
(i) Bombardier Service Bulletin 601R-57-052, Revision A, dated
October 28, 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 [email protected]; Internet http://www.bombardier.com.
(4) You may review copies of the 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.
(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 October 14, 2012.
John P. Piccola,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2012-26088 Filed 10-30-12; 8:45 am]
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