DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2017-0691; Product Identifier 2017-NM-029-AD; Amendment
39-19068; AD 2017-20-11]
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-600-1A11 (CL-600), CL-600-2A12 (CL-601
Variant), and CL-600-2B16 (CL-601-3A and CL-601-3R Variants) airplanes.
This AD was prompted by a report of laminated shims that may have been
improperly installed at a certain wing tie beam. This AD requires
revising the maintenance or inspection program to incorporate
certification maintenance requirement tasks that introduce revised
checks of the tie beam. We are issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective November 15, 2017.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 15,
2017.
ADDRESSES: For service information identified in this final rule,
contact Bombardier, Inc., 400 Cote-Vertu Road West, Dorval,
Quebec H4S 1Y9, Canada; Widebody Customer Response Center North
America toll-free telephone 1-866-538-1247 or direct-dial telephone 1-
514-855-2999; fax 514-855-7401; email ac.yul@aero.bombardier.com;
Internet http://www.bombardier.com. You may view this referenced
service information at the FAA, Transport Standards Branch, 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-2017-0691.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.
gov by searching for and locating Docket No. FAA-2017-
0691; 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 Office (telephone
800-647-5527) is 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 20590.
FOR FURTHER INFORMATION CONTACT: Aziz Ahmed, Aerospace Engineer,
Airframe and Mechanical Systems Section, FAA, New York ACO Branch, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7329;
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-600-1A11 (CL-600), CL-600-2A12 (CL-601 Variant), and CL-600-
2B16 (CL-601-3A and CL-601-3R Variants) airplanes. The NPRM published
in the Federal Register on July 17, 2017 (82 FR 32652) (``the NPRM'').
The NPRM was prompted by a report of laminated shims that may have been
improperly installed at a certain wing tie beam. The NPRM proposed to
require revising the maintenance or inspection program to incorporate
certification maintenance requirement tasks that introduce revised
checks of the tie beam. We are issuing this AD to detect and correct
degradation of the structural integrity of the affected tie beam, which
could result in cracking of the pressure floor.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2016-34, dated October 14, 2016 (referred to after
this as the Mandatory Continuing Airworthiness Information, or ``the
MCAI''), to correct an unsafe condition for certain Bombardier, Inc.,
Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601 Variant), and CL-600-
2B16 (CL-601-3A and CL-601-3R Variants) airplanes. The MCAI states:
Bombardier has determined that laminated shims may have been
improperly installed at the floor/wing tie beam bumper pads.
Improperly installed shims may become damaged, which could result in
a gapping condition. This would lead to increased stress and
degradation of structural integrity of the tie beam. Undetected
failure may lead to premature cracking of the pressure floor.
Bombardier has introduced revised maintenance tasks through
revisions of the applicable CL-600 Time Limits Maintenance Checks
(TLMCs) to confirm structural integrity of the affected tie beam.
This [Canadian] AD is issued to mandate the incorporation of the
applicable revised TLMC tasks.
You may examine the MCAI in the AD docket on the Internet at http://
www.regulations.gov by searching for and locating Docket No. FAA-2017-
0691.
This AD requires revisions to certain operator maintenance
documents to include new actions (e.g., inspections). Compliance with
these actions is required by 14 CFR 91.403(c). For airplanes that have
been previously modified, altered, or repaired in the areas addressed
by this AD, the operator may not be able to accomplish the actions
described in the revisions. In this situation, to comply with 14 CFR
91.403(c), the operator must request approval for an alternative method
of compliance according to paragraph (i)(1) of this AD. The request
should include a description of changes to the required actions that
will ensure the continued operational safety of the airplane.
Comments
We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM 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 except for
minor editorial changes. We have determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM for correcting the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.
Related Service Information Under 1 CFR Part 51
Bombardier, Inc., has issued the following service information.
Task 53-10-00-131, ``Pressure Floor--Wing Tie Beam--
FS460.00,'' of Section 5-10-30, ``Airworthiness Limitation Checks by
ATA Chapter Number,'' of Bombardier Challenger 600 Time Limits/
Maintenance Checks, Publication No. PSP 605, Revision 37, dated April
29, 2016.
Task 53-10-00-133, ``Pressure Floor--Wing Tie Beam--
FS460.00,'' of Section 5-10-30, ``Airworthiness Limitation Checks by
ATA Chapter Number,'' of Bombardier Challenger 601 Time Limits/
Maintenance Checks, Publication No. PSP 601-5, Revision 44, dated April
29, 2016.
Task 53-10-00-134, ``Pressure Floor--Wing Tie Beam--
FS460.00,'' of Section 5-10-30, ``Airworthiness Limitation Checks by
ATA Chapter Number,'' of Bombardier Challenger 601 Time Limits/
Maintenance Checks, Publication No. PSP 601A-5, Revision 40, dated
April 29, 2016.
This service information identifies airworthiness limitation tasks
for checks of the pressure floor at a certain wing tie beam. These
documents are distinct since they apply to different airplane models.
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.
Costs of Compliance
We estimate that this AD affects 137 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:
Estimated Costs
Action |
Labor cost |
Parts cost |
Cost per product |
Cost on U.S. operators |
Maintenance or inspection program
revision |
1 work-hour x $85 per hour =
$85 |
$0 |
$85 |
$11,645 |
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.
This AD is issued in accordance with authority delegated by the
Executive Director, Aircraft Certification Service, as authorized by
FAA Order 8000.51C. In accordance with that order, issuance of ADs is
normally a function of the Compliance and Airworthiness Division, but
during this transition period, the Executive Director has delegated the
authority to issue ADs applicable to transport category airplanes to
the Director of the System Oversight Division.
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.
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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