DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0521; Product Identifier 2016-NM-189-AD; Amendment
39-19086; AD 2017-22-06]
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-600-2B16 (CL-601-3A, CL-601-3R, and CL-604
Variants) airplanes. This AD was prompted by reports of fuel leaks in
the engine and auxiliary power unit (APU) electrical fuel pump (EFP)
cartridge/canister electrical connectors and conduits. This AD requires
repetitive inspections for fuel leakage at the engine and APU fuel
pumps, and related investigative and corrective actions if necessary.
We are issuing this AD to address the unsafe condition on these
products.

DATES: This AD is effective November 30, 2017.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 30,
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-2017-0521.

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-
0521; 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: Steven Dzierzynski, Aerospace
Engineer, Avionics and Administrative Services Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7367; 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-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants)
airplanes. The NPRM published in the Federal Register on June 2, 2017
(82 FR 25556) (``the NPRM''). The NPRM was prompted by reports of fuel
leaks in the engine and APU EFP cartridge/canister electrical
connectors and conduits. The NPRM proposed to require repetitive
inspections for fuel leakage at the engine and APU fuel pumps, and
related investigative and corrective actions if necessary. We are
issuing this AD to detect and correct fuel leaks in certain fuel pumps
to remove a potential fuel ignition hazard.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2016-32R1, dated October 12, 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-
2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) airplanes. The MCAI
states:

Fuel leaks have been reported in the engine and auxiliary power
unit (APU) electrical fuel pump (EFP) cartridge/canister electrical
connectors and conduits on production aeroplanes. Initially,
Bombardier had determined that the subject discrepancy was limited
to the new pump canister installations on 24 production aeroplanes.
Bombardier also reported the possibility of cut insulation on the
electric harness wires of the newly installed canister housing
assemblies.
Emergency [Canadian] AD CF-2014-17 [which corresponds to FAA AD
2014-15-17, Amendment 39-17919 (79 FR 44268, July 31, 2014)] was
issued to limit landing light operation on-ground in order to
address a potential fire hazard as result of a possible fuel leak
from the APU, EFP electrical conduit in the landing light
compartment. In addition, [Canadian] AD CF-2014-21 [which
corresponds to FAA AD 2014-20-01, Amendment 39-17974 (79 FR 59640,
October 3, 2014), superseded by FAA AD 2016-10-10, Amendment 39-
18521 (81 FR 31497, May 19, 2016) (``AD 2016-10-10'')] was issued to
mandate removal of then identified 24 discrepant EFP canister
assemblies from service.
Bombardier has recently determined that the subject fuel leaks
may not be limited to the 24 units affected by [Canadian] AD CF-
2014-21 [(AD 2016-10-10)], but may potentially affect other in-
service [Bombardier Model] CL-600-2B16 aeroplanes. Until such time
that a final fix for the fuel leak problem is realized, Bombardier
as an interim mitigating action, has issued [Service Bulletin] SB
604-28-022 and SB 605-28-010 that introduces [a] repeat [general
visual] inspection and if required, rectification [related
investigative and corrective actions] of subject fuel leaks on
affected aeroplanes. [Canadian] AD CF-2016-32 was issued on 29
September 2016 to mandate compliance with applicable Bombardier SBs,
to mitigate any potential safety hazard resulting from fuel leaks.
Revision 1 of this [Canadian] AD is being issued to correct a
typographic error in paragraph B.1. of the [Canadian AD] Corrective
Actions.

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-
0521.

Comments

We gave the public the opportunity to participate in developing
this AD. The following presents the comment received on the NPRM and
the FAA's response.
Request To Delay Issuance Until the Release of New Service
Information

Bombardier, Inc., indicated its intent to revise Bombardier Service
Bulletin 604-28-022, dated October 19, 2015; and Bombardier Service
Bulletin 605-28-010, dated October 19, 2015. Bombardier, Inc., stated
that these revisions will change the inspection instructions.
Bombardier, Inc., further added that it plans to publish new service
information to introduce similar inspections on Model CL-650 airplanes.
We infer that Bombardier, Inc., is requesting that we delay the
issuance of this final rule until after the revised service information
is released and then refer to the revised service information. We
disagree with the commenter's request. We do not consider that delaying
this action until release of the planned service information is
warranted since the service information incorporated by reference in
this AD adequately addresses the unsafe condition. We might consider
additional rulemaking once the revised service information is released,
or if new service information is issued for Model CL-650 airplanes,
which are not included in the applicability of this AD. We have not
changed this AD in this regard.

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 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 Service Bulletin 604-28-022, dated
October 19, 2015; and Service Bulletin 605-28-010, dated October 19,
2015. This service information describes procedures for repetitive
general visual inspections for fuel leakage at the engine and APU fuel
pumps, and related investigative and corrective actions if necessary.
These documents are distinct since they apply to airplanes in different
configurations. 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 121 airplanes of U.S. registry.
We estimate the following costs to comply with this AD:

Estimated Costs

For Model CL-600-2B16 airplanes having serial numbers 5701 through
5955 inclusive, 5957, 5960 through 5966 inclusive, 5968 through 5971
inclusive, and 5981, we estimate the following costs to do any
necessary replacements that would be required based on the results of
the required inspection. We have no way of determining the number of
aircraft that might need these replacements:

On-Condition Costs

For Model CL-600-2B16 airplanes having serial numbers 5301 through
5665 inclusive, we have received no definitive data that would enable
us to provide cost estimates for the on-condition actions specified in
this AD.
According to the manufacturer, some of the costs of this AD may be
covered under warranty, thereby reducing the cost impact on affected
individuals. We do not control warranty coverage for affected
individuals. As a result, we have included all costs in our cost
estimate.

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):