This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

3364 

Vol. 89, No. 12 

Thursday, January 18, 2024 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No. FAA–2023–2437; Notice No. 25– 

24–01–SC] 

Special Conditions: Gulfstream 

Aerospace Corporation Model GVIII– 

G700 and GVIII–G800 Series Airplanes; 

Flight Envelope Protection: Takeoff 

Stall Protection 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed special 

conditions. 

SUMMARY: These special conditions are 

issued for the Gulfstream Aerospace 

Corporation (Gulfstream) Model GVIII– 

G700 and GVIII–G800 series airplanes. 

These airplanes 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 an envelope protection 

function to protect the airplane from 

over- and rapid-rotation on takeoff. 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: Send comments on or before 

February 7, 2024. 

ADDRESSES: Send comments identified 

by Docket No. FAA–2023–2437 using 

any of the following methods: 

Federal eRegulations Portal: Go to 

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. 

Docket: Background documents or 

comments received may be read at 

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: Troy 

Brown, Performance and Environment 

Unit, AIR–621A, Technical Policy 

Branch, Policy and Standards Division, 

Aircraft Certification Service, Federal 

Aviation Administration, 1801 S Airport 

Rd, Wichita, KS 67209–2190; telephone 

and fax 405–666–1050; email 

troy.a.brown@faa.gov. 

SUPPLEMENTARY INFORMATION: 

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 proposed special 

conditions, explain the reason for any 

recommended change, and include 

supporting data. 

On December 31, 2019, Gulfstream 

applied for an amendment to Type 

Certificate No. T00015AT to include the 

new Model GVIII–G700 and GVIII–G800 

series airplanes. While the comment 

period provided by the FAA for 

proposed special conditions has 

typically been thirty days, the FAA is 

providing twenty days in this instance, 

due to the relative similarity of these 

conditions with the terms of previously 

issued special conditions, and due to 

the pendency of the anticipated delivery 

date for the affected airplane models, 

per the criteria in 14 CFR 11.38. The 

FAA will consider all comments 

received by the closing date for 

comments and will consider comments 

filed late if it is possible to do so 

without incurring delay. The FAA may 

change these special conditions based 

on the comments received. 

Privacy 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in title 14, 

Code of Federal Regulations (14 CFR) 

11.35, the FAA will post all comments 

received without change to 

www.regulations.gov, including any 

personal information you provide. The 

FAA will also post a report 

summarizing each substantive verbal 

contact received about these special 

conditions. 

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 these special 

conditions contain commercial or 

financial information that is customarily 

treated as private, that you actually treat 

as private, and that is relevant or 

responsive to these special conditions, 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 these special 

conditions. Send submissions 

containing CBI to the individual listed 

in the FOR FURTHER INFORMATION

CONTACT section above. Comments the 

FAA receives, which are not specifically 

designated as CBI, will be placed in the 

public docket for these special 

conditions. 

Background 

As noted above, on December 31, 

2019, Gulfstream applied for an 

amendment to Type Certificate No. 

T00015AT to include the new Model 

GVIII–G700 and GVIII–G800 series 

airplanes. These airplanes, which will 

be derivatives of the Model GVI 

currently approved under Type 

Certificate No. T00015AT, are twinengine, transport-category airplanes, 

with seating for 19 passengers, and a 

maximum take-off weight of 107,600 


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Federal Register / Vol. 89, No. 12 / Thursday, January 18, 2024 / Proposed Rules 3365 

pounds (GVIII–G700) and 105,600 

pounds (GVIII–G800). 

Type Certification Basis 

Under the provisions of title 14, Code 

of Federal Regulations (14 CFR) 21.101, 

Gulfstream must show that the Model 

GVIII–G700 and GVIII–G800 series 

airplanes meet the applicable provisions 

of the regulations listed in Type 

Certificate No. T00015AT, 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 Gulfstream Model GVIII–G700 

and GVIII–G800 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 type certificate 

for that model be amended later to 

include any other model that 

incorporates the same novel or unusual 

design feature, or should any other 

model already included on the same 

type certificate be modified 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 Gulfstream Model 

GVIII–G700 and GVIII–G800 series 

airplanes must comply with the 

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 14 CFR 11.38, and they become 

part of the type certification basis under 

§ 21.101. 

Novel or Unusual Design Features 

The Gulfstream Model GVIII–G700 

and GVIII–G800 airplanes will 

incorporate the following novel or 

unusual design feature: 

An envelope protection function 

within the electronic flight control 

system (EFCS) to protect the airplane 

from over- and rapid-rotation on takeoff. 

Discussion 

The Gulfstream Model GVIII–G700 

and GVIII–G800 series airplanes are 

equipped with an envelope protection 

function within the EFCS that is 

designed to provide enhanced takeoff 

stall protection (TSP). This feature 

protects against excessive pitch rate and 

pitch attitude during takeoff using a 

limitation in the electronic flight 

controls. It is designed to provide 

conventional behavior using a normal 

takeoff technique, including 

‘‘performance’’ takeoffs. The on-ground 

mode is a pitch rate command with a 

pitch attitude limit. The functionality in 

on-ground mode is that pitch rate 

command is proportional to stick input. 

The limit to pitch attitude will 

indirectly limit the angle of attack. 

The TSP involves a control law 

update in the on-ground control mode 

only. The Model GVIII–G700 and GVIII– 

G800 series airplane’s pitch control 

behavior, with regard to rotation rates 

and attitudes for normal takeoffs, will be 

similar to other Gulfstream airplanes 

equipped with side sticks; however, 

takeoffs with rapid rotation rates and 

over-rotation will be influenced by the 

TSP. 

The current regulations in Subpart B 

of 14 CFR part 25 do not address 

envelope protections for electronic 

flight control systems as this technology 

is novel or unusual for transport 

category airplanes. These special 

conditions are specific to the GVIII– 

G700 and GVIII–G800 series airplanes. 

These conditions are necessary to 

ensure a smooth transition from normal 

flight to the TSP mode and adequate 

maneuver capability. These conditions 

also ensure that the structural limits of 

the airplane are not exceeded. 

Furthermore, failure of the TSP function 

must not create hazardous flight 

conditions. 

The proposed 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 

Gulfstream Model GVIII–G700 and 

GVIII–G800 series airplanes. Should 

Gulfstream apply at a later date for a 

change to the type certificate to include 

another model that incorporates the 

same novel or unusual design feature, or 

should any other model already 

included on the same type certificate be 

modified to incorporate the same novel 

or unusual design feature, these special 

conditions would apply to the other 

model as well. 

Conclusion 

This action affects only a certain 

novel or unusual design feature on 

Gulfstream Model GVIII–G700 and 

GVIII–G800 series of airplanes. It is not 

a rule of general applicability. 

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, and 44704. 

The Special Conditions 

Accordingly, pursuant to the 

authority delegated to me by the 

Administrator, the following special 

conditions are proposed as part of the 

type certification basis for the 

Gulfstream Model GVIII–G700 and 

GVIII–G800 series airplanes. 

For airplanes that employ a takeoff 

stall protection function: 

(a) The takeoff stall protection 

function must not unduly limit the 

maneuvering capability of the airplane 

nor interfere with its ability to perform 

maneuvers required for normal and 

emergency operations. 

(b) Onset characteristics of the takeoff 

stall protection function must be 

appropriate to the phase of flight and 

type of maneuver and must not conflict 

with the ability of the pilot to 

satisfactorily control the airplane flight 

path, speed, or attitude. 

(c) Excursions of a limited flight 

parameter beyond its nominal design 

limit value due to dynamic 

maneuvering, airframe and system 

tolerances, and non-steady atmospheric 

conditions must not result in unsafe 

flight characteristics or conditions. 

(d) Operation of the takeoff stall 

protection function must not adversely 

affect aircraft control during expected 

levels of atmospheric disturbances, nor 

impede the application of recovery 

procedures in case of windshear. 

(e) Activation of the takeoff stall 

protection function must not result in 

adverse coupling or adverse priority. 

(f) In case of abnormal attitude or 

excursion of any flight parameters 

outside the protected boundaries, 

operation of the takeoff stall protection 

functions must not hinder airplane 

recovery. 

Issued in Kansas City, Missouri, on January 

11, 2024. 

Patrick R. Mullen, 

Manager, Technical Policy Branch, Policy and 

Standards Division, Aircraft Certification 

Service. 

[FR Doc. 2024–00810 Filed 1–17–24; 8:45 am] 

BILLING CODE P 


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