67436 Federal Register / Vol. 85, No. 206 / Friday, October 23, 2020 / Rules and Regulations 
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 7737–300, –400, –700, –800, –8, and –9 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 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 737 series airplane 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 737–300, –400, 
–700, –800, –8, and –9 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 sources internal to the airplane, to the airplane’s 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 737 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, and 
•passenger entertainment. 
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 other network sources. This network architecture creates a potential for unauthorized persons to access the aircraft control domain and airline information-services domain from sources internal 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) 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 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 Boeing 
Model 737–300, –400, –700, –800, –8, and –9 series airplanes. Should Archeion apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. A16WE 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 
Boeing Model 737–300, –400, –700, –800, –8, and –9 series 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. 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 Boeing Model 737–300, –400, –700, –800, –8, and –9 series airplanes, as modified by Archeion Holdings, LLC, for airplane 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 aircraft 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 
October 5, 2020. 
James E. Wilborn, Acting Manager, Transport Standards 
Branch, Policy and Innovation Division, Aircraft Certification Service. 
[FR Doc. 2020–22357 Filed 10–22–20; 8:45 am] 
BILLING CODE 4910–13–P 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 25 
[Docket No. FAA–2020–0927; Special 
Conditions No. 25–776–SC] 
Special Conditions: Chicago Jet 
Group, Dassault Aviation Model Falcon 900 Airplane; Rechargeable Lithium Batteries 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final special conditions; request 
for comments. 
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SUMMARY : These special conditions are 
issued for the Dassault Aviation 
(Dassault) Model Falcon 900 airplane. This airplane, as modified by Chicago Jet Group, 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 Midcontinent Instrument TS835 Standby Batteries that contain rechargeable lithium batteries. 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 
Chicago Jet Group on October 23, 2020. Send comments on or before December 7, 2020. 
ADDRESSES : Send comments identified 
by Docket No. FAA–2020–0927 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: The FAA will post all 
comments it receives, without change, to http://www.regulations.gov/, 
including any personal information the commenter provides. Using the search function of the docket website, anyone can find and read the electronic form of all comments received into any FAA docket, including the name of the individual sending the comment (or signing the comment for an association, business, labor union, etc.). DOT’s complete Privacy Act Statement can be found in the Federal Register published on April 11, 2000 (65 FR 19477–19478). 
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 : 
Nazih Khaouly, Airplane & Flight Crew Interface Section, AIR–671, Transport Standards Branch, Policy and Innovation Division, Aircraft Certification Service, Federal Aviation Administration, 2200 South 216th Street, Des Moines, Washington 98198; telephone and fax 206–231–3160; email nazih.khaouly@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 has determined that prior public notice and comment are unnecessary, and finds that, for the same reason, good cause exists for adopting these special conditions upon publication in the Federal Register. 
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 April 27, 2020, Chicago Jet Group 
applied for a supplemental type 
certificate to install, in the Dassault Model Falcon 900 airplane, Midcontinent Instrument TS835 Standby Batteries that contain rechargeable lithium batteries. The Dassault Model Falcon 900 airplane is a three-engine, transport category business jet, with capacity for 19 passengers, and a maximum takeoff weight of 45,500 lbs. 
Type Certification Basis 
Under the provisions of title 14, Code 
of Federal Regulations (14 CFR) 21.101, 
Chicago Jet Group must show that the Dassault Model Falcon 900 airplane, as changed, continues to meet the applicable provisions of the regulations listed in Type Certificate No. A46EU 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 Dassault Model Falcon 900 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 Dassault Model Falcon 900 airplane 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 Features 
The Dassault Model Falcon 900 
airplane will incorporate the following 
novel or unusual design features: 
Midcontinent Instrument TS835 
Standby Batteries that contain rechargeable lithium batteries. 
Discussion 
Rechargeable lithium batteries are 
considered to be a novel or unusual 
design feature in transport category airplanes, with respect to the requirements in § 25.1353. This type of battery has certain failure, operational, and maintenance characteristics that differ significantly from those of the nickel-cadmium and lead-acid rechargeable batteries currently approved for installation on transport category airplanes. These batteries introduce higher energy levels into airplane systems through new chemical compositions in various battery-cell sizes and construction. Interconnection of these cells in battery packs introduces failure modes that require unique design considerations, such as provisions for thermal management. 
Known uses of rechargeable and non- 
rechargeable lithium batteries on airplanes include: 
•Flightdeck and avionics systems 
such as displays, global positioning systems, cockpit voice recorders, flight data recorders, underwater-locator- beacons, navigation computers, 
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integrated avionics computers, satellite 
network/communication systems, communication management units, and remote monitor electronic line replaceable units; 
•Cabin safety, entertainment and 
communications equipment including emergency locator transmitters, life rafts, escape slides, seat belt air bags, cabin management systems, Ethernet switches, routers and media servers, wireless systems, internet/in-flight entertainment systems, satellite televisions, remotes and handsets; and 
•Systems in cargo areas including 
door controls, sensors, video surveillance equipment and security systems. 
Special Condition 1 requires that each 
individual cell within a battery be designed to maintain safe temperatures and pressures. Special Condition 2 addresses these same issues but for the entire battery. Special Condition 2 requires that the battery be designed to prevent propagation of a thermal event, such as self-sustained, uncontrolled increases in temperature or pressure from one cell to adjacent cells. 
Special Conditions 1 and 2 are 
intended to ensure that the cells and battery are designed to eliminate the potential for uncontrollable failures. However, a certain number of failures will occur due to various factors beyond the control of the designer. Therefore, other special conditions are intended to protect the airplane and its occupants if failure occurs. 
Special Conditions 3, 7, and 8 are self- 
explanatory, and the FAA does not provide further explanation for them at this time. 
Special Condition 4 clarifies that the 
flammable-fluid fire-protection requirements of § 25.863 apply to rechargeable lithium battery 
installations. Section 25.863 is applicable to areas of the airplane that could be exposed to flammable fluid leakage from airplane systems. Rechargeable lithium batteries contain electrolyte that is a flammable fluid. 
Special Condition 5 requires each 
rechargeable lithium battery installation to not damage surrounding structure or adjacent systems, equipment, or electrical wiring from corrosive fluids or gases that may escape in such a way as to cause a major or more severe failure condition. Special Condition 6 requires each rechargeable lithium battery installation to have provisions to prevent any hazardous effect on airplane structure or systems caused by the maximum amount of heat it can generate due to any failure of it or its individual cells. The means of meeting special conditions 5 and 6 may be the same, but they are independent requirements addressing different hazards. Special Condition 5 addresses corrosive fluids and gases, whereas special condition 6 addresses heat. 
Special Condition 9 requires 
rechargeable lithium batteries to have ‘‘automatic’’ means, for charge rate and disconnect, due to the fast-acting nature of lithium battery chemical reactions. Manual intervention would not be timely or effective in mitigating the hazards associated with these batteries. 
These special conditions apply to all 
rechargeable lithium battery installations in lieu of § 25.1353(b)(1) through (4) at Amendment 25–123 or § 25.1353(c)(1) through (4) at earlier amendments. Those regulations remain in effect for other battery installations. 
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 Dassault 
Model Falcon 900 airplane. Should Chicago Jet Group apply at a later date for a supplemental type certificate to modify any other model included on Type Certificate No. A46EU 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 Chicago Jet Group. It is not a rule of general applicability and affects only the applicant who applied to the FAA for approval of this feature on the airplane. 
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 Dassault Model Falcon 900 airplanes, as modified by Chicago Jet Group. In lieu of § 25.1353(b)(1) through 
(b)(4) at amendment 25–123 or § 25.1353(c)(1) through (c)(4) at earlier amendments, each rechargeable lithium battery installation must: 
1. Be designed to maintain safe cell 
temperatures and pressures under all foreseeable operating conditions to prevent fire and explosion. 
2. Be designed to prevent the 
occurrence of self-sustaining, uncontrollable increases in temperature or pressure, and automatically control the charge rate of each cell to protect against adverse operating conditions, such as cell imbalance, back charging, overcharging and overheating. 
3. Not emit explosive or toxic gases, 
either in normal operation or as a result of its failure, that may accumulate in hazardous quantities within the airplane. 
4. Meet the requirements of § 25.863. 
5. Not damage surrounding structure 
or adjacent systems, equipment, or 
electrical wiring from corrosive fluids or gases that may escape in such a way as to cause a major or more-severe failure condition. 
6. Have provisions to prevent any 
hazardous effect on airplane structure or systems caused by the maximum amount of heat it can generate due to any failure of it or its individual cells. 
7. Have a failure sensing and warning 
system to alert the flightcrew if its failure affects safe operation of the airplane. 
8. Have a monitoring and warning 
feature that alerts the flightcrew when its charge state falls below acceptable levels if its function is required for safe operation of the airplane. 
9. Have a means to automatically 
disconnect from its charging source in the event of an over-temperature condition, cell failure, or battery failure. 
Note: A battery system consists of the 
battery, battery charger, and any protective monitoring and alerting circuitry or hardware inside or outside of the battery. It also includes vents (where necessary) and packaging. For the purpose of these special conditions, a battery and the battery system is referred to as a battery. 
Issued in Des Moines, Washington, on 
October 7, 2020. 
James E. Wilborn, Acting Manager, Transport Standards 
Branch, Policy and Innovation Division, Aircraft Certification Service. 
[FR Doc. 2020–22618 Filed 10–22–20; 8:45 am] 
BILLING CODE 4910–13–P 
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