This section of the FEDERAL REGISTER

contains regulatory documents having general

applicability and legal effect, most of which

are keyed to and codified in the Code of

Federal Regulations, which is published under

50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by

the Superintendent of Documents.

Rules and Regulations Federal Register

463 

Vol. 83, No. 3 

Thursday, January 4, 2018 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No. FAA–2017–0963; Special 

Conditions No. 25–707–SC] 

Special Conditions: Learjet Inc., Model 

45 Airplane; Non-Rechargeable 

Lithium Battery Installations 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final special conditions; request 

for comment. 

SUMMARY: These special conditions are 

issued for non-rechargeable lithium 

battery installations on the Learjet Inc. 

(Learjet) Model 45 airplane. Nonrechargeable lithium batteries are a 

novel or unusual design feature when 

compared to the state of technology 

envisioned in the airworthiness 

standards for transport-category 

airplanes. 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 Learjet 

on January 4, 2018. We must receive 

your comments by February 20, 2018. 

ADDRESSES: Send comments identified 

by docket number FAA–2017–0963 

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), 

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 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 and Flight 

Crew Interface Branch, AIR–671, 

Transport Airplane Directorate, Aircraft 

Certification Service, 1601 Lind Avenue 

SW, Renton, Washington 98057–3356; 

telephone 425–227–2432; facsimile 

425–227–1149. 

SUPPLEMENTARY INFORMATION: 

Future Requests for Installation of NonRechargeable Lithium Batteries 

The FAA anticipates that nonrechargeable lithium batteries will be 

installed in most makes and models of 

transport-category airplanes. We intend 

to require special conditions for 

certification projects involving nonrechargeable lithium battery 

installations to address certain safety 

issues until we can revise the 

airworthiness requirements. Applying 

special conditions to these installations 

across the range of transport-category 

airplanes will ensure regulatory 

consistency. 

Typically, the FAA issues special 

conditions after receiving an application 

for type certificate approval of a novel 

or unusual design feature. However, the 

FAA has found that the presence of nonrechargeable lithium batteries in 

certification projects is not always 

immediately identifiable, because the 

battery itself may not be the focus of the 

project. Meanwhile, the inclusion of 

these batteries has become virtually 

ubiquitous on in-production transport 

category airplanes, which shows that 

there will be a need for these special 

conditions. Also, delaying the issuance 

of special conditions until after each 

design application is received could 

lead to costly certification delays. 

Therefore, the FAA finds it necessary to 

issue special conditions applicable to 

these battery installations on particular 

makes and models of aircraft. 

On April 22, 2016, the FAA published 

special conditions no. 25–612–SC in the 

Federal Register (81 FR 23573) 

applicable to Gulfstream Aerospace 

Corporation for the Model GVI airplane. 

Those were the first special conditions 

the FAA issued for non-rechargeable 

lithium battery installations. We 

explained in that document our 

decision to make those special 

conditions effective one year after 

publication in the Federal Register, 

which is April 22, 2017. In those special 

conditions, the FAA stated its intention 

to apply non-rechargeable lithium 

battery special conditions to design 

changes on other airplane makes and 

models applied for after this same date. 

Section 1205 of the FAA 

Reauthorization Act of 1996 requires the 

FAA to consider the extent to which 

Alaska is not served by transportation 

modes other than aviation, and to 

establish appropriate regulatory 

distinctions when modifying 

airworthiness regulations that affect 

intrastate aviation in Alaska. In 

consideration of this requirement and 

the overall impact on safety, the FAA 

does not intend to require nonrechargeable lithium battery special 

conditions for design changes that only 

replace a 121.5 megahertz (MHz) 

emergency-locator transmitter (ELT) 

with a 406 MHz ELT that meets 

Technical Standard Order C126b, or 

later revision, on transport airplanes 

operating only in Alaska. This will 

support FAA efforts of encouraging 

operators in Alaska to upgrade to a 406 

MHz ELT. These ELTs provide 

significantly improved accuracy for 


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464 Federal Register / Vol. 83, No. 3 / Thursday, January 4, 2018 / Rules and Regulations 

lifesaving services to locate an accident 

site in Alaskan terrain. The FAA 

considers that the safety benefits from 

upgrading to a 406 MHz ELT for Alaska 

operations will outweigh the battery fire 

risk. 

Comments Invited 

The substance of these special 

conditions has been subjected to the 

public-notice and comment period in 

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 

impracticable, 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. 

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 

Learjet holds type certificate no. 

T00008WI, which provides the 

certification basis for the Model 45 

airplane. The Model 45 airplane is a 

twin-engine, transport-category 

airplanes with a passenger seating 

capacity of 9 and a maximum takeoff 

weight of 20,500 pounds. 

The FAA is issuing these special 

conditions for non-rechargeable lithium 

battery installations on the Model 45 

airplane. The current battery 

requirements in title 14, Code of Federal 

Regulations (14 CFR) part 25 are 

inadequate for addressing an airplane 

with non-rechargeable lithium batteries. 

Type Certification Basis 

Under the provisions of 14 CFR 

21.101, Learjet must show that the 

Model 45 airplane meets the applicable 

provisions of the regulations listed in 

type certificate no. T00008WI or the 

applicable regulations in effect on the 

date of application for the change, 

except for earlier amendments as agreed 

upon by the FAA. In addition, the 

certification basis includes certain 

special conditions, exemptions, or later 

amended sections that are not relevant 

to these special conditions. 

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 45 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 airplane 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 Model 45 airplane must 

comply with the fuel-vent and exhaustemission 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 novel or unusual design feature is 

the installation of non-rechargeable 

lithium batteries. 

For the purpose of these special 

conditions, we refer to a battery and 

battery system as a battery. A battery 

system consists of the battery and any 

protective, monitoring, and alerting 

circuitry or hardware inside or outside 

of the battery. It also includes vents 

(where necessary) and packaging. 

Discussion 

The FAA derived the current 

regulations governing installation of 

batteries in transport-category airplanes 

from Civil Air Regulations (CAR) 

4b.625(d), as part of the recodification of 

CAR 4b that established 14 CFR part 25, 

in February 1965. This recodification 

basically reworded the CAR 4b battery 

requirements, which are currently in 

§ 25.1353(b)(1) through (4). Nonrechargeable lithium batteries are novel 

and unusual with respect to the state of 

technology considered when these 

requirements were codified. 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. 

Recent events involving rechargeable 

and non-rechargeable lithium batteries 

prompted the FAA to initiate a broad 

evaluation of these energy storage 

technologies. In January 2013, two 

independent events involving 

rechargeable lithium-ion batteries 

revealed unanticipated failure modes. A 

National Transportation Safety Board 

(NTSB) letter to the FAA, dated May 22, 

2014, which is available at http://

www.ntsb.gov, filename A–14–032– 

036.pdf, describes these events. 

On July 12, 2013, an event involving 

a non-rechargeable lithium battery in an 

emergency-locator transmitter 

installation demonstrated unanticipated 

failure modes. The United Kingdom’s 

Air Accidents Investigation Branch 

Bulletin S5/2013 describes this event. 

Some known uses of rechargeable and 

non-rechargeable lithium batteries on 

airplanes include: 

• Flight deck and avionics systems 

such as displays, global positioning 

systems, cockpit voice recorders, flightdata recorders, underwater-locator 

beacons, navigation computers, 

integrated avionics computers, satellite 

network and communication systems, 

communication management units, and 

remote-monitor electronic linereplaceable units; 

• Cabin safety, entertainment, and 

communications equipment, including 

emergency-locator transmitters, life 

rafts, escape slides, seatbelt air bags, 

cabin-management systems, Ethernet 

switches, routers and media servers, 

wireless systems, internet and in-flight 

entertainment systems, satellite 

televisions, remotes, and handsets; 

• Systems in cargo areas including 

door controls, sensors, videosurveillance equipment, and security 

systems. 

Some known potential hazards and 

failure modes associated with nonrechargeable lithium batteries are: 

• Internal failures: In general, these 

batteries are significantly more 

susceptible to internal failures that can 

result in self-sustaining increases in 

temperature and pressure (i.e., thermal 

runaway) than their nickel-cadmium or 

lead-acid counterparts. The metallic 

lithium can ignite, resulting in a selfsustaining fire or explosion. 

• Fast or imbalanced discharging: 

Fast discharging or an imbalanced 

discharge of one cell of a multi-cell 

battery may create an overheating 

condition that results in an 


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Federal Register / Vol. 83, No. 3 / Thursday, January 4, 2018 / Rules and Regulations 465 

uncontrollable venting condition, which 

in turn leads to a thermal event or an 

explosion. 

• Flammability: Unlike nickelcadmium and lead-acid batteries, 

lithium batteries use higher energy and 

current in an electrochemical system 

that can be configured to maximize 

energy storage of lithium. They also use 

liquid electrolytes that can be extremely 

flammable. The electrolyte, as well as 

the electrodes, can serve as a source of 

fuel for an external fire if the battery 

casing is breached. 

Special condition no. 1 of these 

special conditions requires that each 

individual cell within a nonrechargeable lithium battery be designed 

to maintain safe temperatures and 

pressures. Special condition no. 2 

addresses these same issues, but for the 

entire battery. Special condition no. 2 

requires that the battery be designed to 

prevent propagation of a thermal event, 

such as self-sustained, uncontrollable 

increases in temperature or pressure 

from one cell to adjacent cells. 

Special conditions nos. 1 and 2 are 

intended to ensure that the nonrechargeable lithium battery and its 

cells 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 battery designer. 

Therefore, other special conditions are 

intended to protect the airplane and its 

occupants if failure occurs. 

Special conditions 3, 7, and 8 are selfexplanatory. 

Special condition no. 4 makes it clear 

that the flammable-fluid fire protection 

requirements of § 25.863 apply to nonrechargeable lithium battery 

installations. Section 25.863 is 

applicable to areas of the airplane that 

could be exposed to flammable-fluid 

leakage from airplane systems. Nonrechargeable lithium batteries contain 

an electrolyte that is a flammable fluid. 

Special condition no. 5 requires that 

each non-rechargeable lithium battery 

installation 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. 

While special condition no. 5 

addresses corrosive fluids and gases, 

special condition no. 6 addresses heat. 

Special condition no. 6 requires that 

each non-rechargeable lithium battery 

installation has provisions to prevent 

any hazardous effect on airplane 

structure or systems caused by the 

maximum amount of heat the battery 

installation can generate due to any 

failure of it or its individual cells. The 

means of meeting special conditions 

nos. 5 and 6 may be the same, but the 

requirements are independent and 

address different hazards. 

These special conditions apply to all 

non-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 

These special conditions are 

applicable to the Learjet Model 45 

airplane. Should Learjet apply at a later 

date for a change to the type certificate 

to include another model incorporating 

the same novel or unusual design 

feature, these special conditions would 

apply to that model as well. 

These special conditions are only 

applicable to design changes applied for 

after the effective date. 

These special conditions are not 

applicable to changes to previously 

certified non-rechargeable lithium 

battery installations where the only 

change is either cosmetic, or to relocate 

the installation to improve the safety of 

the airplane and occupants. Previously 

certified non-rechargeable lithium 

battery installations, as used in this 

paragraph, are those installations 

approved for certification projects 

applied for on or before the effective 

date of these special conditions. A 

cosmetic change is a change in 

appearance only, and does not change 

any function or safety characteristic of 

the battery installation. These special 

conditions are also not applicable to 

unchanged, previously certified nonrechargeable lithium battery 

installations that are affected by a 

change in a manner that improves the 

safety of its installation. The FAA 

determined that these exclusions are in 

the public interest because the need to 

meet all of the special conditions might 

otherwise deter these design changes 

that improve safety. 

Conclusion 

This action affects only certain a 

novel or unusual design feature on one 

model of airplane. It is not a rule of 

general applicability. 

The substance of these special 

conditions has been subjected to the 

notice and comment period in 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 

impracticable, 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 record keeping 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 the Learjet Model 

45 airplane. 

Non-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, each 

non-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. 

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 means for the flightcrew or 

maintenance personnel to determine the 


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466 Federal Register / Vol. 83, No. 3 / Thursday, January 4, 2018 / Rules and Regulations 

battery charge state if the battery’s 

function is required for safe operation of 

the airplane. 

Note: A battery system consists of the 

battery 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 ‘‘battery system’’ are referred to 

as a battery. 

Issued in Renton, Washington, on 

December 28, 2017. 

Suzanne Masterson, 

Acting Manager, Transport Standards 

Branch, Policy and Innovation Division, 

Aircraft Certification Service. 

[FR Doc. 2017–28454 Filed 1–3–18; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No. FAA–2017–0483; Special 

Conditions No. 25–708–SC] 

Special Conditions: Airbus Model 

A330–841 and A330–941 (A330neo) 

Airplanes; Electronic Flight-Control 

System; Lateral-Directional and 

Longitudinal Stability, and Low-Energy 

Awareness 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final special conditions; request 

for comments. 

SUMMARY: These special conditions are 

issued for the Airbus Model A330–841 

and A330–941 (A330neo) 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 low-energy awareness 

and directional stability with respect to 

electronic flight-control systems (EFCS). 

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 Airbus 

on January 4, 2018. Send your 

comments by February 20, 2018. 

ADDRESSES: Send comments identified 

by docket number FAA–2017–0483 

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: Paul 

Giesman, FAA, Airplane and Flight 

Crew Interface, AIR–671, Transport 

Standards Branch, Policy and 

Innovation Division, Aircraft 

Certification Service, 1601 Lind Avenue 

SW, Renton, Washington 98057–3356; 

telephone 425–227–2790; facsimile 

425–227–1320. 

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. The FAA therefore 

finds it unnecessary to delay the 

effective date and finds it unnecessary 

to delay the effective date and 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 January 20, 2015, Airbus applied 

for an amendment to Type Certificate 

No. A46NM to include the new Model 

A330–841 (A330–800neo) and A330– 

941 (A330–900neo) airplanes, 

collectively marketed as Model 

A330neo airplanes. These airplanes, 

which are derivatives of the Model 

A330–200 and A330–300 airplanes 

currently approved under Type 

Certificate No. A46NM, are wide-body, 

jet-engine airplanes with a maximum 

takeoff weight of 533,519 pounds and a 

passenger capacity of 257 (A330–841); 

and a maximum takeoff weight of 

535,503 pounds and a passenger 

capacity of 287 (A330–941). 

Type Certification Basis 

Under the provisions of title 14, Code 

of Federal Regulations (14 CFR) 21.101, 

Airbus must show that the Model 

A330neo airplanes meet the applicable 

provisions of the regulations listed in 

Type Certificate No. A46NM, 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 

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

adequate or appropriate safety standards 

for Model A330neo 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 Airbus Model A330neo 

airplanes must comply with the fuelvent and exhaust-emission requirements 

of 14 CFR part 34 and the noiseVerDate Sep<11>2014 14:53 Jan 03, 2018 Jkt 244001 PO 00000 Frm 00004 Fmt 4700 Sfmt 4700 E:\FR\FM\04JAR1.SGM 04JAR1

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