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

75284 

Vol. 78, No. 238 

Wednesday, December 11, 2013 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No. FAA–2013–1038; Notice No. 25– 

13–37–SC] 

Special Conditions: Bombardier Inc., 

Models BD–500–1A10 and BD–500– 

1A11 Series Airplanes; Flight Envelope 

Protection: High Speed Limiting 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed special 

conditions. 

SUMMARY: This action proposes special 

conditions for the Bombardier Inc. 

Models BD–500–1A10 and BD–500– 

1A11 series airplanes. These airplanes 

will have a novel or unusual design 

feature associated with an electronic 

flight control system that contains flyby-wire control laws, including 

envelope protections, for the overspeed 

protection and roll limiting function. 

The applicable airworthiness 

regulations do not contain adequate or 

appropriate safety standards for this 

design feature. These 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. 

DATES: Send your comments on or 

before January 27, 2014. 

ADDRESSES: Send comments identified 

by docket number FAA–2013–1038 

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 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: Joe 

Jacobsen, FAA, Airplane and Flight 

Crew Interface Branch, ANM–111, 

Transport Airplane Directorate, Aircraft 

Certification Service, 1601 Lind Avenue 

SW., Renton, Washington 98057–3356; 

telephone 425–227–2011; facsimile 

425–227–1149. 

SUPPLEMENTARY INFORMATION: 

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 on or before the closing date for 

comments. We may change these special 

conditions based on the comments we 

receive. 

Background 

On December 10, 2009, Bombardier 

Inc. applied for a type certificate for 

their new Models BD–500–1A10 and 

BD–500–1A11 series airplanes (hereafter 

collectively referred to as ‘‘C-series’’). 

The C-series airplanes are swept-wing 

monoplanes with a pressurized cabin. 

They share an identical supplier base 

and significant common design 

elements. The fuselage is aluminum 

alloy material, blended double-bubble 

fuselage, sized for nominal 5-abreast 

seating. Each airplane’s powerplant 

consists of two under wing Pratt and 

Whitney PW1524G ultra-high bypass, 

geared turbofan engines. Flight controls 

are fly-by-wire flight with two passive/ 

uncoupled side sticks. Avionics 

includes five landscape primary cockpit 

displays. The dimension of the 

airplanes encompass a wingspan of 115 

feet; a height of 37.75 feet; and a length 

of 114.75 feet for the Model BD–500– 

1A10 and a length of 127 feet for the 

Model BD–500–1A11. Passenger 

capacity is designated as 110 for the 

Model BD–500–1A10 and 125 for the 

Model BD–500–1A11. Maximum takeoff 

weight is 131,000 pounds for the Model 

BD–500–1A10 and 144,000 pounds for 

the Model BD–500–1A11. Maximum 

takeoff thrust is 21,000 pounds for the 

Model BD–500–1A10 and 23,300 

pounds for the Model BD–500–1A11. 

Range is 3,394 miles (5,463 kilometers) 

for both models of airplanes. Maximum 

operating altitude is 41,000 feet for both 

model airplanes. 

The longitudinal control law design of 

the Bombardier C-series airplanes 

incorporates an overspeed protection 

system in the normal mode. This mode 

prevents the pilot from inadvertently or 

intentionally exceeding a speed 

approximately equivalent to the 

maximum speed for stability 

characteristics (VFC) or attaining 

demonstrated flight diving speed (VDF). 

Current Title 14, Code of Federal 

Regulations (14 CFR) part 25 standards 

did not envision a high speed limiter 

that might preclude or modify flying 

qualities assessments in the overspeed 

region. 

Type Certification Basis 

Under the provisions of 14 CFR 21.17, 

Bombardier Inc. must show that the Cseries airplanes meet the applicable 

provisions of part 25 as amended by 

Amendments 25–1 through 25–129 

thereto. 

If the Administrator finds that the 

applicable airworthiness regulations 


emcdonald on DSK67QTVN1PROD with PROPOSALS
Federal Register / Vol. 78, No. 238 / Wednesday, December 11, 2013 / Proposed Rules 75285 

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

adequate or appropriate safety standards 

for the C-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 or similar novel 

or unusual design feature, the special 

conditions would also apply to the other 

model under § 21.101. 

In addition to the applicable 

airworthiness regulations and special 

conditions, the C-series airplanes 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, in accordance 

with § 11.38, and they become part of 

the type-certification basis under 

§ 21.17(a)(2). 

Novel or Unusual Design Features 

The C-series airplanes will 

incorporate the following novel or 

unusual design features: An electronic 

flight control system that contains flyby-wire control laws, including 

envelope protections, for the overspeed 

protection and roll limiting function. 

Current part 25 requirements do not 

contain appropriate standards for high 

speed protection systems. 

Discussion 

The overspeed protection 

functionality includes multifunction 

spoilers (MFS) that will automatically 

deploy as speed brakes once the 

airspeed exceeds a small tolerance 

above maximum operating limit speed 

(Vmo/Mmo); the MFS will retract 

automatically when speed is 

subsequently reduced. Special 

conditions are necessary in addition to 

the requirements of § 25.143 for the 

operation of the high speed protection. 

The general intent is that the overspeed 

protection does not impede normal 

maneuvering and speed control, and 

that the overspeed protection does not 

restrict or prevent emergency 

maneuvering. 

These 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 Models 

BD–500–1A10 and BD–500–1A11 series 

airplanes. Should Bombardier Inc. 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 two 

model 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. 

The authority citation for these 

special conditions is as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701, 

44702, 44704. 

The Proposed Special Conditions 

Accordingly, the Federal Aviation 

Administration (FAA) proposes the 

following special conditions as part of 

the type certification basis for the 

Bombardier Inc. Models BD–500–1A10 

and BD–500–1A11 series airplanes. 

1. Flight Envelope Protection—High 

Speed Limiting. In addition to § 25.143, 

the following requirements apply: 

Operation of the high speed limiter 

during all routine and descent 

procedure flight must not impede 

normal attainment of speeds up to 

overspeed warning. 

Issued in Renton, Washington, on 

November 29, 2013. 

Jeffrey E. Duven, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2013–29485 Filed 12–10–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No. FAA–2013–1039; Notice No. 25– 

13–38–SC] 

Special Conditions: Bombardier Inc., 

Models BD–500–1A10 and BD–500– 

1A11 Series Airplanes; Flight Envelope 

Protection: Normal Load Factor (g) 

Limiting 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed special 

conditions. 

SUMMARY: This action proposes special 

conditions for the Bombardier Inc. 

Models BD–500–1A10 and BD–500– 

1A11 series airplanes. These airplanes 

will have a novel or unusual design 

feature associated with an electronic 

flight control system that prevents the 

pilot from inadvertently or intentionally 

exceeding the positive or negative 

airplane limit load factor. The 

applicable airworthiness regulations do 

not contain adequate or appropriate 

safety standards for this design feature. 

These 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. 

DATES: Send your comments on or 

before January 27, 2014. 

ADDRESSES: Send comments identified 

by docket number FAA–2013–1039 

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 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, 


emcdonald on DSK67QTVN1PROD with PROPOSALS