14233 Federal Register / Vol. 86, No. 48 / Monday, March 15, 2021 / Rules and Regulations 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 25 
[Docket No. FAA–2020–1207; Special 
Conditions No. 25–782–SC] 
Special Conditions: Rockwell Collins, 
Bombardier Model BD–100–1A10 Airplane; Electronic-System Security Protection From Unauthorized Internal Access 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final special conditions; request 
for comments. 
SUMMARY : These special conditions are 
issued for the Bombardier Model BD– 100–1A10 airplane. This airplane, as modified by Rockwell Collins, will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport-category airplanes. This design feature is the installation of a system that allows connection to airplane electronic systems and networks, and access from sources internal to the airplane to the previously isolated internal airplane electronic assets. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. 
DATE : This action is effective on 
Rockwell Collins on March 15, 2021. Send comments on or before April 29, 2021. 
ADDRESSES : Send comments identified 
by Docket No. FAA–2020–1207 using any of the following methods: 
•Federal eRegulations Portal: Go to 
http://www.regulations.gov/ and follow 
the online instructions for sending your comments electronically. 
•Mail: Send comments to Docket 
Operations, M–30, U.S. Department of Transportation (DOT), 1200 New Jersey Avenue SE, Room W12–140, West Building Ground Floor, Washington, DC 20590–0001. 
•Hand Delivery or Courier: Take 
comments to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. 
•Fax: Fax comments to Docket 
Operations at 202–493–2251. Privacy: Except for Confidential 
Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received without change, to http://www.regulations.gov/, including any 
personal information you provide. The FAA will also post a report summarizing each substantive verbal contact received about this proposal. 
Confidential Business Information: 
Confidential Business Information (CBI) is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this Notice contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this Notice, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as ‘‘PROPIN.’’ The FAA will treat such marked submissions as confidential under the FOIA, and the indicated comments will not be placed in the public docket of this Notice. Send submissions containing CBI to the person indicated in the Contact section below. Comments the FAA receives, which are not specifically designated as CBI, will be placed in the public docket for this rulemaking. 
Docket: Background documents or 
comments received may be read at http://www.regulations.gov/ at any time. 
Follow the online instructions for accessing the docket or go to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. 
FOR FURTHER INFORMATION CONTACT : 
Varun Khanna, Aircraft Information Systems Section, AIR–622, Technical Innovation Policy Branch, Policy and Innovation Division, Aircraft Certification Service, Federal Aviation Administration, 2200 South 216th Street, Des Moines, Washington 98198; telephone and fax 206–231–3159; email varun.khanna@faa.gov. 
SUPPLEMENTARY INFORMATION : The 
substance of these special conditions has been published in the Federal Register for public comment in several 
prior instances with no substantive comments received. Therefore, the FAA finds, pursuant to 14 CFR 11.38(b), that new comments are unlikely, and public notice and comment prior to this publication are unnecessary. 
Comments Invited 
The FAA invites interested people to 
take part in this rulemaking by sending 
written comments, data, or views. The most helpful comments reference a specific portion of the special conditions, explain the reason for any recommended change, and include supporting data. 
The FAA will consider all comments 
received by the closing date for comments. The FAA may change these special conditions based on the comments received. 
Background 
On May 3, 2019, Rockwell Collins 
applied for a supplemental type 
certificate for installation of the Rockwell Collins Pro Line Fusion System in the Bombardier Model BD– 100–1A10 airplane, requiring security protection from unauthorized internal access. The Bombardier Model BD–100– 1A10 airplane is a twin-engine, transport-category airplane with a passenger capacity of 19 and a maximum takeoff weight of 40,600 pounds. 
Type Certification Basis 
Under the provisions of title 14, Code 
of Federal Regulations (14 CFR) 21.101, 
Rockwell Collins must show that the Bombardier Model BD–100–1A10 airplane, as changed, continues to meet the applicable provisions of the regulations listed in Type Certificate No. T00005NY, or the applicable regulations in effect on the date of application for the change, except for earlier amendments as agreed upon by the FAA. 
If the Administrator finds that the 
applicable airworthiness regulations (e.g., 14 CFR part 25) do not contain 
adequate or appropriate safety standards for the Bombardier Model BD–100– 1A10 airplane because of a novel or unusual design feature, special conditions are prescribed under the provisions of § 21.16. 
Special conditions are initially 
applicable to the model for which they are issued. Should the applicant apply for a supplemental type certificate to modify any other model included on the same type certificate to incorporate the same novel or unusual design feature, these special conditions would also apply to the other model under § 21.101. 
In addition to the applicable 
airworthiness regulations and special conditions, the Bombardier Model BD– 100–1A10 airplane must comply with the fuel-vent and exhaust-emission 
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requirements of 14 CFR part 34, and the 
noise-certification requirements of 14 CFR part 36. 
The FAA issues special conditions, as 
defined in 14 CFR 11.19, in accordance with § 11.38, and they become part of the type certification basis under § 21.101. 
Novel or Unusual Design Features 
The Bombardier Model BD–100–1A10 
airplane, as modified by Rockwell 
Collins, will incorporate the following 
novel or unusual design feature: 
Installation of the Rockwell Collins 
Pro Line Fusion System, which allows connection to airplane electronic systems and networks, and access from sources internal to the airplane to the previously isolated internal airplane electronic assets. 
Discussion 
The Bombardier Model BD–100–1A10 
airplane architecture is novel or unusual 
for commercial transport airplanes because it allows connection to previously isolated data networks connected to systems that perform functions required for the safe operation and maintenance of the airplane. This data network and design integration creates a potential for unauthorized persons to access the aircraft-control domain and airline information-services domain, and presents security vulnerabilities related to the introduction of computer viruses and worms, user errors, and intentional sabotage of airplane electronic assets (networks, systems, and databases) critical to the safety and maintenance of the airplane. 
The existing FAA regulations did not 
anticipate these networked airplane system architectures. Furthermore, these regulations and the current guidance material do not address potential security vulnerabilities, which could be exploited by unauthorized access to airplane networks, data buses, and servers. Therefore, these special conditions ensure that the security (i.e., confidentiality, integrity, and availability) of airplane systems will not be compromised by unauthorized wired or wireless connections from within the airplane. These special conditions also require the applicant to provide appropriate instructions to the operator to maintain all electronic-system safeguards that have been implemented as part of the original network design so that this feature does not allow or reintroduce security threats. 
These special conditions contain the 
additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing 
airworthiness standards. 
Applicability 
As discussed above, these special 
conditions are applicable to the 
Bombardier Model BD–100–1A10 airplane. Should Rockwell Collins apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. T00005NY to incorporate the same novel or unusual design feature, these special conditions would apply to that model as well. 
Conclusion 
This action affects only a certain 
novel or unusual design feature on one 
model of airplane, as modified by Rockwell Collins. It is not a rule of general applicability and affects only the applicant. 
List of Subjects in 14 CFR Part 25 
Aircraft, Aviation safety, Reporting 
and recordkeeping requirements. Authority Citation 
The authority citation for these 
special conditions is as follows: 
Authority: 49 U.S.C. 106(f), 106(g), 40113, 
44701, 44702, 44704. 
The Special Conditions 
Accordingly, pursuant to the 
authority delegated to me by the 
Administrator, the following special conditions are issued as part of the type certification basis for Bombardier Model BD–100–1A10 airplanes, as modified by Rockwell Collins, for electronic-system security protection from unauthorized internal access. 
1. The applicant must ensure that the 
design provides isolation from, or airplane electronic-system security protection against, access by unauthorized sources internal to the airplane. The design must prevent inadvertent and malicious changes to, and all adverse impacts upon, airplane equipment, systems, networks, or other assets required for safe flight and operations. 
2. The applicant must establish 
appropriate procedures to allow the operator to ensure that continued airworthiness of the airplane is maintained, including all post-type- certification modifications that may have an impact on the approved electronic-system security safeguards. Issued in Des Moines, Washington, on 
February 9, 2021. 
Suzanne Masterson, Manager, Transport Airplane Strategic Policy 
Section, Policy and Innovation Division, Aircraft Certification Service. 
[FR Doc. 2021–05293 Filed 3–12–21; 8:45 am] 
BILLING CODE 4910–13–P 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 25 
[Docket No. FAA–2020–0817; Special 
Conditions No. 25–779–SC] 
Special Conditions: Airbus Model 
A321neo ACF Airplane; Dynamic Test Requirements for Single-Occupant Oblique (Side-Facing) Seats With 3- Point Restraints 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final special conditions; request 
for comments. 
SUMMARY : These special conditions are 
issued for the Airbus Model A321neo Cabin Flex (ACF) airplane. This airplane will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport- category airplanes. This design feature is single-occupant oblique seats with 3- point restraints. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. 
DATES : This action is effective on Airbus 
on March 15, 2021. Send comments on or before April 29, 2021. 
ADDRESSES : Send comments identified 
by Docket No. FAA–2020–0817 using any of the following methods: 
•Federal eRegulations Portal: Go to 
http://www.regulations.gov/ and follow 
the online instructions for sending your comments electronically. 
•Mail: Send comments to Docket 
Operations, M–30, U.S. Department of Transportation (DOT), 1200 New Jersey Avenue SE, Room W12–140, West Building Ground Floor, Washington, DC 20590–0001. 
•Hand Delivery or Courier: Take 
comments to Docket Operations in Room W12–140 of the West Building Ground Floor at 1200 New Jersey Avenue SE, Washington, DC, between 9 
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