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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2014-1046; Directorate Identifier 2014-NM-021-AD;
Amendment 39-18286; AD 2015-20-07]
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
certain
Bombardier, Inc. 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. This AD was prompted by a determination that
no instructions for continued airworthiness exist for the nose landing
gear (NLG) alternate extension actuator of the NLG alternate release
system. This AD requires revising the maintenance or inspection
program, as applicable, to incorporate a new airworthiness limitation
task for the NLG alternate extension actuator. We are issuing this AD
to prevent failure of the NLG alternate release system and, if the
normal NLG extension system also fails, failure of the NLG to extend,
and consequent damage to the airplane and injury to occupants.
DATES: This AD becomes effective November 10, 2015.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of November 10,
2015.
ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2014-1046
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. It
is also available on the Internet at http://www.regulations.gov by
searching for and locating Docket No. FAA-2014-1046.
FOR FURTHER INFORMATION CONTACT: Luke Walker, 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 516-228-7363; 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 certain Bombardier, Inc.
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. The NPRM published in the Federal Register on January 23,
2015 (80 FR 3502).
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2013-24R1, dated December 24, 2013 (referred to after this as the
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to
correct an unsafe condition for certain Bombardier, Inc. 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. The
MCAI states:
It was discovered that there are no instructions for continued
airworthiness for the Nose Landing Gear (NLG) alternate extension
actuator. Without an effective maintenance task to maintain the
aeroplane's inherent level of safety, there is a potential that a
dormant failure of the alternate release system of the NLG could
occur. Failure of the NLG alternate release system could prevent the
nose landing gear from extending in the case of a failure of the
normal NLG extension system.
This [Canadian] AD is to mandate the incorporation of a new
maintenance task to prevent failure of the NLG alternate release
system.
Revision 1 of this [Canadian] AD changes the phase-in time to be
based on the NLG manual release actuators instead of aeroplanes.
You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2014-1046-0002.
Comments
We gave the public the opportunity to participate in developing
this AD. The following presents the comments received on the NPRM (80
FR 3502, January 23, 2015) and the FAA's response to each comment.
Support for the NPRM (80 FR 3502, January 23, 2015)
Airline Pilots Association (ALPA) International agreed with the
intent of the NPRM (80 FR 3502, January 23, 2015).
Request To Revise Compliance Time
Envoy Airlines and Mesa Airlines asked that we revise the
compliance time language in paragraph (h) of the proposed AD (80 FR
3502, January 23, 2015) from ``whichever occurs first'' to ``whichever
occurs later.'' The compliance time, as written, could result in
airplanes being grounded. Envoy Airlines added that the compliance time
referred to in the TCCA AD is ``whichever occurs later.'' Mesa Airlines
noted that changing the compliance time would also allow for scheduling
and parts procurement.
We agree with the commenters' request for the reasons provided, and
due to the fact that this was an inadvertent error. We have revised the
compliance time in paragraph (h) of this AD as requested.
Conclusion
We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
this AD with the change described previously and minor editorial
changes. We have determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM (80 FR 3502, January 23, 2015) for correcting the unsafe
condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM (80 FR 3502, January 23, 2015).
We also determined that these changes will not increase the
economic burden on any operator or increase the scope of this AD.
Related Service Information Under 1 CFR Part 51
Bombardier, Inc. has issued Task 320100-225, Restoration of the NLG
Manual Release Actuator, of Subject 1-32, Landing Gear, of Section 1,
Systems and Powerplant Program, Volume 1 of Part 1, Maintenance Review
Board Report, Revision 14, dated July 10, 2013, of the CRJ 700/900/1000
Maintenance Requirements Manual, CSP-B-053. This service information
describes an airworthiness limitation task for the NLG alternate
extension actuator. This service information is reasonably available
because the interested parties have access to it through their normal
course of business or by the means identified in the ADDRESSES section
of this AD.
Costs of Compliance
We estimate that this AD affects 416 airplanes of U.S. registry.
We also estimate that it takes about 1 work-hour 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 $35,360, or $85 per product.
In addition, we estimate that any necessary follow-on actions take
about 1 work-hour and require parts costing $0, for a cost of $85 per
product. We have no way of determining the number of aircraft that
might 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.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2014-1046;
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
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 adding the following new airworthiness
directive (AD):
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