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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2017-0481; Product Identifier 2016-NM-196-AD; Amendment
39-19003; AD 2017-17-13]
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-100-1A10 airplanes. This AD was prompted by
reports of low clearance in the aft equipment bay between auxiliary
power unit (APU) generator power cables and a hydraulic line, which can
cause damage to wire insulation. This AD requires an inspection of the
APU generator power cables and the adjacent hydraulic line for damage,
and repair, if necessary; and modification of the APU generator power
cable installation. We are issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective October 2, 2017.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of October 2,
2017.
ADDRESSES: For service information identified in this final rule,
contact Bombardier, Inc., 400 Cote-Vertu Road West, Dorval,
Quebec 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 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-2017-0481.
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-
0481; 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: Assata Dessaline, Aerospace Engineer,
Avionics and Administrative Services Section, FAA, New York ACO Branch,
1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-
7301; 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-100-1A10 airplanes. The NPRM published in the Federal Register
on May 19, 2017 (82 FR 22913) (``the NPRM''). The NPRM was prompted by
reports of low clearance in the aft equipment bay between APU generator
power cables and a hydraulic line, which can cause damage to wire
insulation. The NPRM proposed to require an inspection of the APU
generator power cables and the adjacent hydraulic line for damage, and
repair, if necessary; and modification of the APU
generator power cable installation. We are issuing this AD to prevent
electrical arcing from power cables, which could cause a fire in the
aft equipment bay.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2016-28, dated September 15, 2016 (referred to after this as the
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to
correct an unsafe condition for certain Bombardier, Inc., Model BD-100-
1A10 airplanes. The MCAI states:
Low clearance between the APU generator power cables and a
hydraulic return line was found in the Aft Equipment Bay (AEB) on
some aeroplanes in service. Absence of clearance can cause damage to
the insulation of the wire, which can lead to a fault in the APU
electrical system or arcing with the metallic hydraulic return line
and could cause a fire in the AEB.
This [Canadian] AD is issued to mandate an [general visual]
inspection [for damage] of the APU generator power cables and the
hydraulic return line, [and repair, if necessary] and a modification
of the clamp arrangement to give sufficient clearance between the
power cables and the hydraulic return line.
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-
0481.
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
We reviewed Bombardier Service Bulletin 100-24-28, dated July 27,
2016; and Bombardier Service Bulletin 350-24-003, dated July 27, 2016.
This service information describes procedures for the inspection of the
APU generator power cables and adjacent hydraulic line for damage, and
repair, if necessary; and modification of the APU generator power cable
installation. These documents are distinct since they apply to
different airplane 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 162 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
|
| Inspect and modify cables |
1 work-hour x $85 per hour =
$85 |
(¹)
|
$85
|
$13,770
|
¹ We have received no definitive data
that would enable us to provide cost
estimates for the parts cost associated with the modification specified
in this AD.
We estimate the following costs to do any necessary repairs that
would be required based on the results of the inspection. We have no
way of determining the number of aircraft that might need these
repairs:
On-Condition Costs
|
Action
|
Labor cost
|
Parts cost
|
Cost per
product
|
| Repair |
Up to 5 work-hours x $85 per
hour = Up to $425 |
(¹)
|
Up to $425
|
¹ We have received no definitive
data that would enable us to provide cost
estimates for the parts cost associated with the repair specified in this
AD.
According to the manufacturer, 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 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):
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