Proposed Rule2024-00810
Special Conditions: Gulfstream Aerospace Corporation Model GVIII-G700 and GVIII-G800 Series Airplanes; Flight Envelope Protection: Takeoff Stall Protection
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
January 18, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
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.
Full Text
<html>
<head>
<title>Federal Register, Volume 89 Issue 12 (Thursday, January 18, 2024)</title>
</head>
<body><pre>
[Federal Register Volume 89, Number 12 (Thursday, January 18, 2024)]
[Proposed Rules]
[Pages 3364-3365]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-00810]
========================================================================
Proposed Rules
Federal Register
________________________________________________________________________
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.
========================================================================
Federal Register / Vol. 89, No. 12 / Thursday, January 18, 2024 /
Proposed Rules
[[Page 3364]]
=======================================================================
-----------------------------------------------------------------------
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 <a href="http://www.regulations.gov">www.regulations.gov</a> 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
<a href="http://www.regulations.gov">www.regulations.gov</a> 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 <a href="/cdn-cgi/l/email-protection#4c383e2335622d622e3e233b220c2a2d2d622b233a"><span class="__cf_email__" data-cfemail="7307011c0a5d125d11011c041d331512125d141c05">[email protected]</span></a>.
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 <a href="http://www.regulations.gov">www.regulations.gov</a>, 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 twin-engine, transport-category
airplanes, with seating for 19 passengers, and a maximum take-off
weight of 107,600
[[Page 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
Sec. 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 Sec. 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 Sec. 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
</pre><script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script></body>
</html>Indexed from Federal Register on January 18, 2024.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.