[Federal Register Volume 85, Number 149 (Monday, August 3, 2020)]
[Rules and Regulations]
[Pages 46533-46536]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-16727]


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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 C[ocirc]te Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514 855-
7401; email [email protected]; 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 [email protected].

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

[[Page 46534]]

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
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                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
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1 work-hour x $85 per hour = $85.............................              $0              $85          $32,300
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                                     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

0
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]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2020-12-14 Bombardier, Inc.: Amendment 39-19923; Docket No. FAA-
2020-0104; Product Identifier 2019-NM-210 AD.

(a) Effective Date

    This AD is effective September 8, 2020.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-
700-1A11 airplanes, certificated in any category, serial numbers 
9002 through 9828 inclusive, 9830, 9832 through 9835 inclusive, 
9840, 9854, 9855, and 9998.

(d) Subject

    Air Transport Association (ATA) of America Code 24, Electrical 
power.

[[Page 46535]]

(e) Reason

    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. Incorrect application 
of this anti-fretting coating may lead to galling of the piston rod 
over time, which could cause the unit to seize and fail to fully 
deploy. The FAA is issuing this AD to address 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.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Determine RAT Serial Number

    Within 36 months after the effective date of this AD: Perform an 
inspection to determine the serial number of the RAT deployment 
actuator, having part number (P/N) BZ02001-01 (GL456-1301-1). A 
review of the airplane maintenance records is acceptable in lieu of 
this inspection, provided the serial number of the RAT deployment 
actuator can be conclusively determined from that review.
    (1) If the serial number of the RAT deployment actuator is not 
listed in the table referred to in paragraph 2.B., Part A-Special 
Check, of the Accomplishment Instructions of the applicable 
Bombardier service information specified in figure 1 to paragraphs 
(g)(1) and (2), (h), and (i) of this AD, no further action is 
required by this AD.
[GRAPHIC] [TIFF OMITTED] TR03AU20.000

    (2) If the serial number of the RAT deployment actuator is 
listed in the table referred to in paragraph 2.B., Part A-Special 
Check, of the Accomplishment Instructions of the applicable 
Bombardier service information specified in figure 1 to paragraphs 
(g)(1) and (2), (h), and (i) of this AD, do the replacement required 
by paragraph (h) of this AD.

(h) Replacement

    If, during the inspection or records review required by 
paragraph (g) of this AD, any RAT deployment actuator is found to 
have an affected serial number: Within 36 months after the effective 
date of this AD, replace the RAT deployment actuator, having P/N 
BZ02001-01 (GL456-1301-1), with an upgraded part, in accordance with 
Paragraph 2.C., Part B-Modification, of the Accomplishment 
Instructions of the applicable Bombardier service information 
specified in figure 1 to paragraphs (g)(1) and (2), (h), and (i) of 
this AD.

(i) Parts Installation Prohibition

    As of the effective date of this AD, no person may install on 
any airplane, a RAT deployment actuator having P/N BZ02001-01 
(GL456-1301-1) with a serial number referred to in Paragraph 2.B., 
Part A-Special Check, of the Accomplishment Instructions, of the 
applicable Bombardier service information specified in figure 1 to 
paragraphs (g)(1) and (2), (h), and (i) of this AD.

(j) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO Branch, FAA, has the authority to approve AMOCs for this 
AD, if requested using the procedures found in 14 CFR 39.19. In 
accordance with 14 CFR 39.19, send your request to your principal 
inspector or local Flight Standards District Office, as appropriate. 
If sending information directly to the manager of the certification 
office, send it to ATTN: Program Manager, Continuing Operational 
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. Before 
using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
local flight standards district office/certificate holding district 
office.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or 
Bombardier, Inc.'s TCCA Design Approval Organization (DAO). If 
approved by the DAO, the approval must include DAO-authorized 
signature.

(k) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian AD CF-2019-38, dated October 30, 2019, for related 
information. This MCAI may be found in the AD docket on the internet 
at https://www.regulations.gov by searching for and locating Docket 
No. FAA-2020-0104.
    (2) For more information about this AD, 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 [email protected].

(l) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) Bombardier Service Bulletin 700-1A11-24-029, dated February 
22, 2019.
    (ii) Bombardier Service Bulletin 700-24-090, dated February 22, 
2019.
    (iii) Bombardier Service Bulletin 700-24-5015, dated February 
22, 2019.

[[Page 46536]]

    (iv) Bombardier Service Bulletin 700-24-6015, dated February 22, 
2019.
    (3) 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 [email protected]; internet https://www.bombardier.com.
    (4) 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.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on June 19, 2020.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2020-16727 Filed 7-31-20; 8:45 am]
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