DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0550; Product Identifier 2018-NM-024-AD; Amendment
39-19455; AD 2018-20-21]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Bombardier, Inc., Model CL-600-2B16 (CL-604 Variants) airplanes. This
AD was prompted by reports of floodlight lamps found burned and the
corresponding circuit breaker tripped as a result of fluid entering the
cockpit floodlight fixtures. This AD requires installation of new
gasket seals on floodlight fixtures. We are issuing this AD to address
the unsafe condition on these products.

DATES: This AD is effective November 20, 2018.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 20,
2018.

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 service information at the FAA, Transport Standards
Branch, 2200 South 216th St., Des Moines, WA. For information on the
availability of this material at the FAA, call 206-231-3195. It is also
available on the internet at http://www.regulations.gov by searching
for and locating Docket No. FAA-2018-0550.

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-2018-
0550; or in person at Docket Operations between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays. The AD docket contains
this final rule, the regulatory evaluation, any comments received, and
other information. The address for Docket Operations (phone: 800-647-
5527) is 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 Electrical Systems Services Section, FAA, New
York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7367; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

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-604 Variants) airplanes. The NPRM published in
the Federal Register on June 22, 2018 (83 FR 29061). The NPRM was
prompted by reports of floodlight lamps found burned and the
corresponding circuit breaker tripped as a result of fluid entering the
cockpit floodlight fixtures. The NPRM proposed to require installation
of new gasket seals on floodlight fixtures.
We are issuing this AD to address fluid entering the cockpit
floodlight fixtures, which could cause short circuits and damage to
electrical components, which may result in a fire in the cockpit.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2016-40, dated December
15, 2016; and Canadian AD CF-2018-06, dated February 19, 2018; to
correct an unsafe condition for certain Bombardier, Inc., Model CL-600-
2B16 (CL-604 Variants) airplanes. Canadian AD CF-2016-40 and Canadian
AD CF-2018-06 are referred to after this as the Mandatory Continuing
Airworthiness Information, or ``the MCAI.''

Canadian AD CF-2016-40 states:
Several operators have reported a burning odor and smoke
emanating from the cockpit floodlights. Bombardier Aerospace (BA)
has determined the cause to be fluid entering into the cockpit
floodlight fixtures causing short circuits and damage to electrical
components. If not corrected, this condition may result in a fire in
the cockpit.
This [Canadian] AD is issued to mandate the installation of a
new gasket seal on the floodlight fixture.
Canadian AD CF-2018-06 states:
[Canadian] AD CF-2016-40, applicable to Bombardier Inc. model
CL-600-2B16 (604 [CL-604 Variants serial numbers 5301 through 5665
inclusive] and 605 [CL-604 Variants serial numbers 5701 through 5988
inclusive] variants) aeroplanes, was issued to address the potential
of water penetrating into cockpit floodlight fixtures. A similar
condition exists on the CL-600-2B16 (650 variant [CL-604 Variants
serial numbers 6050 through 6070 inclusive]) aeroplanes. This
condition can cause short circuits and damage to electrical
components, which may result in a fire in the cockpit.
This [Canadian] AD mandates the installation of gasket seals on
the pilot and co-pilot floodlight fixtures to prevent fluid from
entering them.

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-2018-
0550.

Comments

We gave the public the opportunity to participate in developing
this final rule. 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 final rule 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 addressing 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 has issued the following service information:
Bombardier Service Bulletin 604-33-007, Revision 02, dated
October 2, 2017.
Bombardier Service Bulletin 605-33-005, Revision 02, dated
October 2, 2017.
Bombardier Service Bulletin 650-33-001, Revision 03, dated
October 2, 2017.
The service information describes procedures to install new gasket
seals on floodlight fixtures. These documents are distinct since they
apply to different configurations of the same airplane model. 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 123 airplanes of U.S. registry. We
estimate the following costs to comply with this AD:

Estimated Costs for Required Actions

According to the manufacturer, some or all 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 known 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 and
associated appliances to the Director of the System Oversight Division.

Regulatory Findings

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):