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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2020-0104; Product Identifier 2019-NM-210-AD; Amendment
39-19923; AD 2020-12-14]
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: The FAA is 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 that the anti-fretting coating on the
piston rods of certain ram air turbine (RAT) deployment actuators may
have been incorrectly applied. This AD requires a review of airplane
maintenance records or an inspection of the RAT deployment actuator to
determine the serial number and, depending on the findings, replacement
with an upgraded RAT deployment actuator. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective September 8, 2020.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of September 8,
2020.
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 https://www.bombardier.
com. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety 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 https://www.regulations.gov by searching for and locating
Docket No. FAA-2020-0104.
Examining the AD Docket
You may examine the AD docket on the internet at https://www.regulations.
gov by searching for and locating Docket No. FAA-2020-
0104; 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, any comments received, and other information. The
address for Docket Operations 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: Thomas Niczky, Aerospace Engineer,
Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7347;
fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian AD CF-2019-38, dated October
30, 2019 (also referred to 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.
You may examine the MCAI in the AD docket on the internet at https://www.
regulations.gov by searching for and locating Docket No. FAA-2020-0104.
The FAA 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 February 24, 2020 (85 FR 10346). The NPRM
was prompted by a report that the anti-fretting coating on the piston
rods of certain RAT deployment actuators may have been incorrectly
applied. The NPRM proposed to require a review of airplane maintenance
records or an inspection of the RAT deployment actuator to determine
the serial number and, depending on the findings, replacement with an
upgraded RAT deployment actuator. The FAA is issuing this AD to address
incorrect application of the anti-fretting coating that may lead to
galling of the piston rod over time, which could cause the unit to
seize and fail to fully deploy. This condition which, if not corrected,
could result in the inability to power essential systems in the event
that other sources of power are also lost. See the MCAI for additional
background information.
Comment
The FAA gave the public the opportunity to participate in
developing this final rule. The following presents the comment received
on the NPRM and the FAA's response.
Request To Require Testing of the Anti-Fretting Coating in Lieu of
Inspection
Paul Risenhoover questioned why the FAA doesn't require testing
instead of the inspection of the anti-fretting coating on the piston
rods of certain ram air turbine (RAT) deployment actuators. The
commenter did not provide justification for his request.
The FAA infers that the commenter was requesting testing of the RAT
deployment actuator in lieu of an inspection of the anti-fretting
coating on the piston rods. The FAA disagrees with the commenter's
request. This AD requires an inspection of the RAT deployment actuator
to
determine the serial number, not an inspection of the anti-fretting coating
on
the piston rods. If the inspection reveals the RAT deployment actuator
is
an older model, the actuator needs to be replaced, regardless of it
passing any test. The older RAT deployment actuator models are
susceptible to failure due to the anti-fretting coating not being
applied correctly to the piston rods. Even if the RAT deployment
actuator passed a test, it would still be susceptible to failure in the
future. The FAA finds it necessary to issue this AD as proposed.
Conclusion
The FAA reviewed the relevant data, considered the comment
received, and determined that air safety and the public interest
require adopting this final rule as proposed, except for minor
editorial changes. The FAA has 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, which
describes procedures for inspecting the RAT deployment actuator to
identify the serial number and replacing certain RAT deployment
actuators with upgraded parts. These documents are distinct since they
apply to different airplane models with different configurations.
Bombardier Service Bulletin 700-1A11-24-029, dated
February 22, 2019.
Bombardier Service Bulletin 700-24-090, dated February 22,
2019.
Bombardier Service Bulletin 700-24-5015, dated February
22, 2019.
Bombardier Service Bulletin 700-24-6015, dated February
22, 2019.
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
The FAA estimates that this AD affects 380 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Action
|
Labor cost
|
Parts cost
|
Cost per
product
|
Cost on
U.S. operators
|
| 1 work-hour x $85 per hour =
$85 |
$0
|
$85
|
$32,300
|
Estimated Costs of On-Condition
Actions
|
Labor
cost
|
Parts cost
|
Cost per
product
|
| 5 work-hours x $85 per hour =
$425 |
Up to $41,006
|
Up to $41,431
|
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 operators. The FAA does not control warranty coverage for
affected operators. As a result, the FAA has included all known costs
in the 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.
The FAA is 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
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) Will not affect intrastate aviation in Alaska, and
(3) 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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