Federal Register / Vol. 78, No. 239 / Thursday, December 12, 2013 / Rules and Regulations 75451 

in appendix C to part 30 of this chapter. 

* * * 

* * * * * 

Dated at Rockville, Maryland, this 6th day 

of December, 2013. 

For the Nuclear Regulatory Commission. 

Cindy Bladey, 

Chief, Rules, Announcements, and Directives 

Branch, Division of Administrative Services, 

Office of Administration. 

[FR Doc. 2013–29694 Filed 12–11–13; 8:45 am] 

BILLING CODE 7590–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No. FAA–2013–1036; Special 

Conditions No. 25–510–SC] 

Special Conditions: Cessna Model 750 

Series Airplanes; Aircraft Electronic 

System Security Protection From 

Unauthorized External Access 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final special condition; request 

for comments. 

SUMMARY: These special conditions are 

issued for the Cessna Model 750 Series 

airplanes. These airplanes will have a 

novel or unusual design feature 

associated with the architecture and 

connectivity capabilities of the 

airplanes’ computer systems and 

networks. Connectivity to, or access by, 

external systems and networks may 

result in security vulnerabilities to the 

airplanes’ systems. 

DATES: The effective date of these 

special conditions is December 12, 

2013. We must receive your comments 

by January 27, 2014. 

ADDRESSES: Send comments identified 

by docket number [FAA–2013–XXXX] 

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 8 

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 Web site, 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), 

as well as at http://DocketsInfo.dot 

.gov/. 

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 the 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, FAA, Airplane and 

Flight Crew Interface Branch, ANM– 

111, Transport Airplane Directorate, 

Aircraft Certification Service, 1601 Lind 

Avenue SW., Renton, Washington 

98057–3356; telephone 425–227–1298; 

facsimile 425–227–1149. 

SUPPLEMENTARY INFORMATION: The 

proposed network architecture includes 

the following connectivity between 

systems: 

1. Airplane control, communication, 

display, monitoring and navigation 

systems, 

2. Operator business and 

administrative support systems, and 

3. Passenger entertainment systems, 

and access by systems external to the 

airplane. 

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. 

The FAA has determined that notice 

of, and opportunity for prior public 

comment on, these special conditions 

are impracticable because these 

procedures would significantly delay 

issuance of the design approval and 

thus delivery of the affected aircraft. 

The FAA has also determined that 

notice of these special conditions is 

unnecessary because the substance of 

these special conditions has been 

subject to the public comment process 

in several prior instances with no 

substantive comments received. The 

FAA therefore finds that good cause 

exists for making these special 

conditions effective upon publication in 

the Federal Register. 

Comments Invited 

We invite 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. 

We will consider all comments we 

receive by the closing date for 

comments. We may change these special 

conditions based on the comments we 

receive. 

Background 

On September 10, 2010, Cessna 

Aircraft Company applied for an 

amendment to the Model 750 Type 

Certificate No. T00007WI. 

The Model 750 is a twin-engine 

pressurized executive jet airplane with 

standard seating provisions for 14 

passenger/crew. This airplane will have 

a maximum takeoff weight of 36,600 

pounds with a wingspan of 69.2 feet, a 

maximum operating altitude of 51,000 

feet, and will have two aft-mounted 

Rolls-Royce AE3007C2 engines. 

The proposed Cessna Model 750 

avionics architecture is novel or 

unusual for executive jet airplanes by 

allowing connection to airplane 

electronic systems and networks, and 

access from aircraft external sources 

(e.g., wireless devices, Internet 

connectivity) to the previously isolated 

airplane electronic assets. Cessna’s 

proposed design is considered by the 

FAA to be an architecture which 

introduces potential security risks and 

vulnerabilities not addressed in current 

regulations and aircraft-level or systemlevel safety assessment methods. 

Consequently, this special condition has 

been produced to address security and 

safety issues arising from the use of this 

type of architecture, and foreseeable 

flight and maintenance applications 

impacted by these interconnected data 

networks and the addition of external 

access points. 

Type Certification Basis 

Under Title 14, Code of Federal 

Regulations (14 CFR) 21.17, Cessna 

must show that the Model 750 series 

meets the applicable provisions of 14 

CFR part 25, as amended by 

Amendments 25–1 through 25–128. The 


wreier-aviles on DSK5TPTVN1PROD with RULES
75452 Federal Register / Vol. 78, No. 239 / Thursday, December 12, 2013 / Rules and Regulations 

certification basis for the 750 (S/N 

-000501 and on) is documented and 

agreed to within the Cessna Aircraft 

Company Model 750 Block Point 

Change G–1 Issue Paper. 

If the Administrator finds that the 

applicable airworthiness regulations 

(i.e., 14 CFR part 25) do not contain 

adequate or appropriate safety standards 

for the Model 750 series because of a 

novel or unusual design feature, special 

conditions are prescribed under § 21.16. 

Special conditions are initially 

applicable to the model for which they 

are issued. Should the type certificate 

for that model be amended later to 

include any other model that 

incorporates the same novel or unusual 

design feature, the proposed special 

conditions would also apply to the other 

model under § 21.101. 

In addition to the applicable 

airworthiness regulations and proposed 

special conditions, the Cessna Model 

750 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 and the FAA must issue a 

finding of regulatory adequacy under 

§ 611 of Public Law 92–574, the ‘‘Noise 

Control Act of 1972.’’ 

The FAA issues special conditions, as 

defined in 14 CFR 11.19, under § 11.38, 

and they become part of the typecertification basis under § 21.17(a)(2). 

Novel or Unusual Design Features 

The Cessna Model 750 will 

incorporate the following novel or 

unusual design features: digital systems 

architecture composed of several 

connected networks. The proposed 

architecture and network configuration 

may be used for, or interfaced with, a 

diverse set of functions, including: 

1. Flight-safety related control, 

communication, display, monitoring, 

and navigation systems (aircraft control 

functions); 

2. Operator business and 

administrative support (operator 

information services); 

3. Passenger information and 

entertainment systems (passenger 

entertainment services); and, 

4. The capability to allow access to or 

by systems external to the airplane. 

Discussion 

The architecture and network 

configuration in the Cessna Model 750 

Series airplanes may allow increased 

connectivity to, or access by, external 

airplane sources, airline operations, and 

maintenance systems to the aircraft 

control functions and airline 

information services. The aircraft 

control functions and airline 

information services perform functions 

required for the safe operation and 

maintenance of the airplane. Previously 

these functions and services had very 

limited connectivity with external 

sources. The architecture and network 

configuration may allow the 

exploitation of network security 

vulnerabilities resulting in intentional 

or unintentional destruction, disruption, 

degradation, or exploitation of data, 

systems, and networks critical to the 

safety and maintenance of the airplane. 

This configuration may also include the 

electronic transmission of field-loadable 

software (and hardware) applications 

and databases to the airplane, which 

would subsequently be loaded into the 

safety-related equipment and systems. 

The existing regulations and guidance 

material did not anticipate these types 

of airplane system architectures. 

Furthermore, 14 CFR regulations and 

current system safety assessment policy 

and techniques do not address potential 

security vulnerabilities, which could be 

exploited by unauthorized access to 

airplane systems, data buses, and 

servers. Therefore, these special 

conditions are issued to ensure that the 

security (i.e., confidentiality, integrity, 

and availability) of airplane systems is 

not compromised by unauthorized 

wired or wireless electronic 

connections. 

For the reasons discussed above, 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 Cessna 

Model 750 Series airplanes. Should 

Cessna apply at a later date for a change 

to the type certificate to include another 

model incorporating the same novel or 

unusual design feature, the special 

conditions would apply to that model as 

well. 

Conclusion 

This action affects only certain novel 

or unusual design features on one model 

series of airplanes. It is not a rule of 

general applicability. 

The substance of these special 

conditions has been subjected to the 

notice and comment period in several 

prior instances and has been derived 

without substantive change from those 

previously issued. It is unlikely that 

prior public comment would result in a 

significant change from the substance 

contained herein. Therefore, the FAA 

has determined that prior public notice 

and comment are unnecessary, and good 

cause exists for adopting these special 

conditions upon publication in the 

Federal Register. The FAA is requesting 

comments to allow interested persons to 

submit views that may not have been 

submitted in response to the prior 

opportunities for comment described 

above. 

List of Subjects in 14 CFR Part 25 

Aircraft, Aviation safety, Reporting 

and recordkeeping requirements. 

The authority citation for these 

special conditions is as follows: 

Authority: 49 U.S.C. 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 Cessna Model 750 

Series airplanes. 

System Security Protection for Aircraft 

Control Domain and Information 

Services Domain From External Access 

1. The applicant must ensure airplane 

electronic system security protection 

from access by unauthorized sources 

external to the airplane, including those 

possibly caused by maintenance 

activity. 

2. The applicant must ensure that 

electronic system security threats are 

identified and assessed, and that 

effective electronic system security 

protection strategies are implemented to 

protect the airplane from all adverse 

impacts on safety, functionality, and 

continued airworthiness. 

3. The applicant must establish 

appropriate procedures to allow the 

operator to ensure that continued 

airworthiness of the aircraft is 

maintained, including all post-typecertification modifications that may 

have an impact on the approved 

electronic system security safeguards. 

Issued in Renton, Washington, on 

December 4, 2013. 

John P. Piccola, Jr., 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2013–29684 Filed 12–11–13; 8:45 am] 

BILLING CODE 4910–13–P 


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