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

75511 

Vol. 78, No. 239 

Thursday, December 12, 2013 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 25 

[Docket No.FAA–2013–1041; Notice No. 25– 

13–40–SC] 

Special Conditions: Bombardier Inc., 

Models BD–500–1A10 and BD–500– 

1A11 Series Airplanes; Electronic 

Flight Control System: Control Surface 

Awareness and Mode Annunciation 

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 control surface 

awareness and mode annunciation of 

the electronic flight control system. 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–2013–1041 

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 Flightcrew 

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. 

Type Certification Basis 

Under the provisions of Title 14, Code 

of Federal Regulations (CFR) 21.17, 

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

provisions of 14 CFR part 25 as 

amended by Amendments 25–1 through 

25–129 thereto. 

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 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 


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75512 Federal Register / Vol. 78, No. 239 / Thursday, December 12, 2013 / Proposed Rules 

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 section 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: A fly-by-wire 

electronic flight control system (EFCS) 

and no direct coupling from the 

flightdeck controller to the control 

surface. As a result, the pilot is not 

aware of the actual control surface 

position as envisioned under current 

airworthiness standards. 

Discussion 

These special conditions propose that 

the flightcrew receive a suitable flight 

control position annunciation when a 

flight condition exists in which nearly 

full surface authority (not crewcommanded) is being used. Suitability 

of such a display must take into account 

that some pilot-demanded maneuvers 

(e.g., rapid roll) are necessarily 

associated with intended full 

performance, which may saturate the 

surface. Therefore, simple alerting 

systems function in both intended and 

unexpected control-limiting situations. 

As a result, they must be properly 

balanced between providing necessary 

crew awareness and being a potential 

nuisance to the flightcrew. A monitoring 

system that compares airplane motion 

and surface deflection with the demand 

of the pilot side stick controller could 

help reduce nuisance alerting. 

These special conditions also address 

flight control system mode 

annunciation. It proposes suitable mode 

annunciation be provided to the 

flightcrew for events that significantly 

change the operating mode of the 

system but do not merit the classic 

‘‘failure warning.’’ 

These special conditions establish a 

level of safety equivalent to that 

provided by a conventional flight 

control system and existing regulations. 

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. Electronic Flight Control System: 

Control Surface Awareness and Mode 

Annunciation. In addition to the 

requirements of §§ 25.143, 25.671, and 

25.672, the following requirements 

apply: 

a. The system design must ensure that 

the flightcrew is made suitably aware 

whenever the primary control means 

nears the limit of control authority. 

Note: The term ‘‘suitably aware’’ 

indicates annunciations provided to the 

flightcrew are appropriately balanced 

between nuisance and that necessary for 

crew awareness. 

b. If the design of the flight control 

system has multiple modes of operation, 

a means must be provided to indicate to 

the flightcrew any mode that 

significantly changes or degrades the 

normal handling or operational 

characteristics of the airplane. 

Issued in Renton, Washington, on 

November 27, 2013. 

John Piccola, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–29685 Filed 12–11–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–1027; Directorate 

Identifier 2013–NM–121–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 737–600, 

–700, 700C, –800, –900, and –900ER 

series airplanes. This proposed AD was 

prompted by a report of installation of 

incorrect wire support clamps within 

the left and right Environmental Control 

Systems (ECS) bay area during 

production, which is a flammable 

leakage zone. Use of incorrect wire 

support clamps that are not fully 

cushioned could allow electrical power 

wiring to come in contact with the 

exposed metal of the improper clamp, 

causing a short circuit and subsequent 

electrical arcing. This proposed AD 

would require inspecting to identify the 

part number of the wire support clamp, 

and related investigative and corrective 

actions if necessary. We are proposing 

this AD to prevent electrical arcing and 

a potential ignition source, which, in 

combination with flammable fuel 

vapors, could result in a fuel tank 

explosion, and consequent loss of the 

airplane. 

DATES: We must receive comments on 

this proposed AD by January 27, 2014. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, Washington 98124– 


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