DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-0676; Directorate Identifier 2014-NM-164-AD;
Amendment 39-18238; AD 2015-17-05]
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 BD-700-1A10 and BD-700-1A11 airplanes. This AD
was prompted by a report of several events where pilots experienced
difficulty in lateral control of the airplane after doing a climb
through heavy rain conditions and a determination that the cause was
water ingress in the aileron control pulley assembly. This AD requires,
for certain airplanes, inspecting for correct clearance and rework if
necessary, and, for certain other airplanes, installing a cover for the
aileron pulley assembly. We are issuing this AD to prevent water
ingress in the aileron control pulley assembly, which could freeze in
cold conditions and result in reduced control of the airplane.

DATES: This AD becomes effective September 29, 2015.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of September 29,
2015.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2015-0676 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-2015-0676.

FOR FURTHER INFORMATION CONTACT: Fabio Buttitta, 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 516-228-7303; 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 BD-700-1A10 and BD-700-1A11 airplanes. The NPRM published in the
Federal Register on March 30, 2015 (80 FR 16608).
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2014-23, dated July 18, 2014 (referred to after this as the Mandatory
Continuing Airworthiness Information, or ``the MCAI''), to correct an
unsafe condition for certain Bombardier, Inc. Model BD-700-1A10 and BD-
700-1A11 airplanes. The MCAI states:

There have been several reports whereby pilots have experienced
difficulty in lateral control following climb through heavy rain
conditions. In each event, the pilots were able to overcome this
difficulty without disconnecting the aileron control. An
investigation has determined that the root cause of the restricted
movement of the aileron was due to water ingress into the wing root
aileron control pulley assembly through a gap on the wing-to-
fuselage fairing resulting in freezing of the aileron control
system.

If not corrected, this condition could result in reduced lateral
control of the aeroplane.
This [Canadian] AD mandates [for certain airplanes] the
incorporation of a cover for the aileron pulley assembly [and
inspection and rework if necessary] to prevent water ingress in the
aileron control pulley assembly [and for certain other airplanes,
mandates an inspection and rework if necessary].

The inspection involves doing a general visual inspection for
correct clearance. You may examine the MCAI in the AD docket on the
Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2015-
0676-0002.

Comments

We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM (80 FR 16608, March 30,
2015) 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 (80 FR 16608, March 30, 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 16608, March 30, 2015).

Related Service Information Under 1 CFR Part 51

Bombardier has issued the following service information:
Service Bulletin 700-1A11-27-034, Revision 04, dated
September 4, 2014;
Service Bulletin 700-27-076, Revision 04, dated September
4, 2014;
Service Bulletin 700-27-5004, Revision 04, dated September
4, 2014; and
Service Bulletin 700-27-6004, Revision 04, dated September
4, 2014.
This service information describes procedures, for certain
airplanes, for installing a cover for the No. 1 aileron pulley,
including an inspection for correct clearance and rework, and for
certain other airplanes, for an inspection for correct clearance and
rework. 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 60 airplanes of U.S. registry.
We also estimate that it will take about 9 work-hours per product
to comply with the basic requirements of this AD. The average labor
rate is $85 per work-hour. Based on these figures, we estimate the cost
of this AD on U.S. operators to be $45,900, or $765 per product.
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.

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-2015-0676; 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):