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Federal Register / Vol. 86, No. 132 / Wednesday, July 14, 2021 / Rules and Regulations
telephone and fax 2062313159; 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 11.38b, that new comments are unlikely and prior public notice and comment 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.

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Background On July 14, 2020, Archeion applied for a change to Type Certificate No.
T00001SE for the installation of an Avionica avWIFI system with wireless network and hosted application functionality in Boeing Model 777200/
200LR/300/300ER series airplanes.
These airplanes, currently approved under Type Certificate No. T00001SE, are twin-engine, transport category airplanes, with a maximum takeoff weight between 535,000 lbs and 775,000
lbs pounds, and a maximum passenger capacity of 550 persons.
Type Certification Basis Under the provisions of title 14, Code of Federal Regulations 14 CFR 21.101, Archeion must show that the Boeing Model 777200/200LR/300/300ER
series airplanes, as changed, continue to meet the applicable provisions of the regulations listed in Type Certificate No.
T00001SE 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 Boeing Model 777200/200LR/
300/300ER series airplanes 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
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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 Boeing Model 777200/
200LR/300/300ER series airplanes must comply with the fuel vent and exhaust emission 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 Feature The Boeing Model 777200/200LR/
300/300ER series airplanes will incorporate the following novel or unusual design feature:
A digital systems architecture for the installation of a system with wireless network and hosted application functionality that allows access from external sources to the airplanes internal electronic components.
Discussion The digital systems architecture for the installation of an Avionica avWIFI
system with wireless network and hosted application functionality on these Boeing model 777 airplanes is a novel or unusual design feature for transport-category airplanes because it is composed of several connected networks. This proposed network architecture is used for a diverse set of airplane functions, including:
Flight-safety related control and navigation systems.
airline business and administrative support.
passenger entertainment, and access by systems external to the airplane.
The airplane-control domain and airline information-services domain of these networks perform functions required for the safe operation and maintenance of the airplane. Previously, these domains had very limited connectivity with external network sources. This network architecture creates a potential for unauthorized persons to access the airplane-control domain and airline information-services domain from sources external to the airplane, 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
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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 electronic connections. This includes ensuring that the security of the airplanes systems is not compromised during maintenance of the airplanes electronic systems. 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 Boeing Model 777200/200LR/300/300ER
series airplanes. Should Archeion apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No.
T00001SE 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 features on one model series of airplanes. 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. 106f, 106g, 40113, 44701, 44702, 44704.

The Special Conditions Accordingly, pursuant to the authority delegated to me by the Administrator, the following special
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