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

66198 

Vol. 76, No. 207 

Wednesday, October 26, 2011 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1092; Directorate 

Identifier 2011–NM–111–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model BD–700–1A10 and BD–700– 

1A11 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

originated by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

During a routine inspection, deformation was 

found at the neck of the pressure regulator 

body on the oxygen Cylinder and Regulator 

Assemblies (CRA). 

An investigation by the vendor * * * 

revealed that the deformation was attributed 

to two (2) batches of raw material that did not 

meet the required tensile strength. This may 

cause elongation of the pressure regulator 

neck, which could result in rupture of the 

oxygen cylinder, and in the case of cabin 

depressurization, oxygen not being available 

when required. 

* * * * * 

The proposed AD would require actions 

that are intended to address the unsafe 

condition described in the MCAI. 

DATES: We must receive comments on 

this proposed AD by December 12, 

2011. 

ADDRESSES: You may send comments 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: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue, SE., Washington, DC, between 

9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Bombardier, 

Inc., 400 Coˆte-Vertu Road West, Dorval, 

Que ́bec H4S 1Y9, Canada; telephone 

514–855–5000; fax 514–855–7401; 

e-mail thd.crj@aero.bombardier.com; 

Internet http://www.bombardier.com. 

You may review copies of the 

referenced service information at the 

FAA, Transport Airplane Directorate, 

1601 Lind Avenue, SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, 

call 425–227–1221. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone (800) 647–5527) is in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7318; fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2011–1092; Directorate Identifier 

2011–NM–111–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

The Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2011–10, 

dated May 13, 2011 (referred to after 

this as ‘‘the MCAI’’), to correct an unsafe 

condition for the specified products. 

The MCAI states: 

During a routine inspection, deformation 

was found at the neck of the pressure 

regulator body on the oxygen Cylinder and 

Regulator Assemblies (CRA). 

An investigation by the vendor, Avox 

Systems Inc., revealed that the deformation 

was attributed to two (2) batches of raw 

material that did not meet the required 

tensile strength. This may cause elongation of 

the pressure regulator neck, which could 

result in rupture of the oxygen cylinder, and 

in the case of cabin depressurization, oxygen 

not being available when required. 

This [Canadian] directive mandates [an 

inspection to determine if a certain oxygen 

CRA is installed and] the replacement of 

oxygen CRAs containing pressure regulators, 

part number (P/N) 806370–06, that do not 

meet the required material properties. 

You may obtain further information by 

examining the MCAI in the AD docket. 

Relevant Service Information 

Bombardier has issued Service 

Bulletins 700–1A11–35–010 (for Model 

BD–700–1A11 airplanes) and 700–35– 

011 (for Model BD–700–1A10 

airplanes), both Revision 01, both dated 

February 1, 2011. The actions described 

in this service information are intended 

to correct the unsafe condition 

identified in the MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to our 

bilateral agreement with the State of 

Design Authority, we have been notified 


jlentini on DSK4TPTVN1PROD with PROPOSALS
Federal Register / Vol. 76, No. 207 / Wednesday, October 26, 2011 / Proposed Rules 66199 

of the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all pertinent 

information and determined an unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 

general, agree with their substance. But 

we might have found it necessary to use 

different words from those in the MCAI 

to ensure the AD is clear for U.S. 

operators and is enforceable. In making 

these changes, we do not intend to differ 

substantively from the information 

provided in the MCAI and related 

service information. 

We might also have proposed 

different actions in this AD from those 

in the MCAI in order to follow FAA 

policies. Any such differences are 

highlighted in a NOTE within the 

proposed AD. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 39 products of U.S. registry. 

We also estimate that it would take 

about 10 work-hours per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $85 per work-hour. Required 

parts would cost about $0 per product. 

Where the service information lists 

required parts costs that are covered 

under warranty, we have assumed that 

there will be no charge for these parts. 

As we do not control warranty coverage 

for affected parties, some parties may 

incur costs higher than estimated here. 

Based on these figures, we estimate the 

cost of the proposed AD on U.S. 

operators to be $33,150, or $850 per 

product. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. ‘‘Subtitle VII: 

Aviation Programs,’’ describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in ‘‘Subtitle VII, 

Part A, Subpart III, Section 44701: 

General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

2. Is not a ‘‘significant rule’’ under the 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

3. Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD and placed it in the 

AD docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

2. The FAA amends § 39.13 by adding 

the following new AD: 

Bombardier, Inc.: Docket No. FAA–2011– 

1092; Directorate Identifier 2011–NM– 

111–AD. 

Comments Due Date 

(a) We must receive comments by 

December 12, 2011. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

Model BD–700–1A10 and BD–700–1A11 

airplanes, certificated in any category, serial 

numbers (S/N) 9002 through 9126 inclusive, 

9128 through 9312 inclusive, 9314 through 

9322 inclusive, 9324 through 9335 inclusive, 

9337, 9338, 9340, 9341, 9343, 9344, 9346, 

9347, 9350, 9353, 9355, 9356, 9358, 9361, 

9365, 9372, 9374, 9384, 9402, 9403, and 

subsequent. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 35: Oxygen. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

During a routine inspection, deformation 

was found at the neck of the pressure 

regulator body on the oxygen Cylinder and 

Regulator Assemblies (CRA). 

An investigation by the vendor * * * 

revealed that the deformation was attributed 

to two (2) batches of raw material that did not 

meet the required tensile strength. This may 

cause elongation of the pressure regulator 

neck, which could result in rupture of the 

oxygen cylinder, and in the case of cabin 

depressurization, oxygen not being available 

when required. 

* * * * * 

Compliance 

(f) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Actions 

(g) For airplanes having S/N 9002 through 

9126 inclusive, 9128 through 9312 inclusive, 

9314 through 9322 inclusive, 9324 through 

9335 inclusive, 9337, 9338, 9340, 9341, 9343, 

9344, 9346, 9347, 9350, 9353, 9355, 9356, 

9358, 9361, 9365, 9372, 9374, 9384, 9402, 

9403: Within 7 months after the effective date 

of this AD, do an inspection of oxygen 

pressure regulators having P/N 806370–06 to 

determine if the serial number is listed in 

Table 2 of the Accomplishment Instructions 

of Bombardier Service Bulletin 700–35–011 

(for Model BD–700–1A10 airplanes) or 700– 

1A11–35–010 (for Model BD–700–1A11 

airplanes), both Revision 01, both dated 

February 1, 2011. 

(1) If the serial number of the pressure 

regulator having P/N 806370–06 is listed in 

Table 2 of the Accomplishment Instructions 

of Bombardier Service Bulletin 700–35–011 

(for Model BD–700–1A10 airplanes) or 700– 

1A11–35–010 (for Model BD–700–1A11 

airplanes), both Revision 01, both dated 

February 1, 2011, within 7 months after the 

effective date of this AD, replace the affected 

oxygen CRA, in accordance with paragraph 

2.C. of the Accomplishment Instructions of 

Bombardier Service Bulletin 700–35–011 (for 

Model BD–700–1A10 airplanes) or 700– 

1A11–35–010 (for Model BD–700–1A11 

airplanes), both Revision 01, both dated 

February 1, 2011. 

(2) If the serial number of the oxygen 

pressure regulator having P/N 806370–06 is 

not listed in Table 2 of the Accomplishment 

Instructions of Bombardier Service Bulletin 

700–35–011 (for Model BD–700–1A10 

airplanes) or 700–1A11–35–010 (for Model 

BD–700–1A11 airplanes), both Revision 01, 


jlentini on DSK4TPTVN1PROD with PROPOSALS
66200 Federal Register / Vol. 76, No. 207 / Wednesday, October 26, 2011 / Proposed Rules 

both dated February 1, 2011, no further 

action is required by this paragraph. 

Parts Installation 

(h) For all airplanes: As of the effective 

date of this AD, no person may install an 

oxygen pressure regulator (P/N 806370–06) 

having any serial number listed in Table 2 of 

the Accomplishment Instructions of 

Bombardier Service Bulletin 700–35–011 (for 

Model BD–700–1A10 airplanes) or 700– 

1A11–35–010 (for Model BD–700–1A11 

airplanes), both Revision 01, both dated 

February 1, 2011, on any airplane, unless a 

suffix ‘‘-A’’ is beside the serial number. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: 

The MCAI applicability specifies only 

airplanes having certain serial numbers and 

prohibits installation of the affected part on 

those airplanes. Because the affected part 

could be rotated onto any of the Model BD– 

700–1A10 and BD–700–1A11 airplanes, this 

AD applies to S/N 9002 through 9126 

inclusive, 9128 through 9312 inclusive, 9314 

through 9322 inclusive, 9324 through 9335 

inclusive, 9337, 9338, 9340, 9341, 9343, 

9344, 9346, 9347, 9350, 9353, 9355, 9356, 

9358, 9361, 9365, 9372, 9374, 9384, 9402, 

9403, and subsequent. This has been 

coordinated with the Transport Canada Civil 

Aviation (TCCA). 

Other FAA AD Provisions 

(i) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (ACO), ANE–170, FAA, 

has the authority to approve AMOCs for this 

AD, if requested using the procedures found 

in 14 CFR 39.19. In accordance with 14 CFR 

39.19, send your request to your principal 

inspector or local Flight Standards District 

Office, as appropriate. If sending information 

directly to the ACO, send it to Attn: Program 

Manager, Continuing Operational Safety, 

FAA, New York ACO, 1600 Stewart Avenue, 

Suite 410, Westbury, New York 11590; 

telephone 516–228–7300; fax 516–794–5531. 

Before using any approved AMOC, notify 

your appropriate principal inspector, or 

lacking a principal inspector, the manager of 

the local flight standards district office/ 

certificate holding district office. The AMOC 

approval letter must specifically reference 

this AD. 

(2) Airworthy Product: For any requirement 

in this AD to obtain corrective actions from 

a manufacturer or other source, use these 

actions if they are FAA-approved. Corrective 

actions are considered FAA-approved if they 

are approved by the State of Design Authority 

(or their delegated agent). You are required 

to assure the product is airworthy before it 

is returned to service. 

Related Information 

(j) Refer to MCAI Transport Canada Civil 

Aviation (TCCA) Airworthiness Directive 

CF–2011–10, dated May 13, 2011; 

Bombardier Service Bulletin 700–35–011, 

Revision 01, dated February 1, 2011; and 

Bombardier Service Bulletin 700–1A11–35– 

010, Revision 01, dated February 1, 2011; for 

related information. 

Issued in Renton, Washington, on October 

17, 2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–27650 Filed 10–25–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1094; Directorate 

Identifier 2011–NM–070–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 757 

airplanes. This proposed AD would 

require inspecting for discrepancies and 

insufficient coverage of the secondary 

fuel barrier, determining the thickness 

of the secondary fuel barrier, and 

corrective actions if necessary. This 

proposed AD was prompted by reports 

that inspections of the wing center 

section revealed defective, misapplied, 

or missing secondary fuel vapor barrier 

on the center fuel tank. We are 

proposing this AD to detect and correct 

defective surfaces and insufficient 

thickness of secondary fuel barrier, 

which could allow fuel leaks or fumes 

into the pressurized cabin, and allow 

fuel or fuel vapors to come in contact 

with an ignition source, which could 

result in a fire or an explosion. 

DATES: We must receive comments on 

this proposed AD by December 12, 

2011. 

ADDRESSES: You may send comments 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– 

2207; telephone 206–544–5000, 

extension 1; fax 206–766–5680; e-mail 

me.boecom@boeing.com; Internet 

https://www.myboeingfleet.com. You 

may review copies of the referenced 

service information at the FAA, 

Transport Airplane Directorate, 1601 

Lind Avenue SW., Renton, Washington. 

For information on the availability of 

this material at the FAA, call 425–227– 

1221. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://www.regulations.

gov; or in person at the Docket 

Management Facility between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Office 

(phone: 800–647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Kevin Nguyen, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, 

Seattle Aircraft Certification Office 

(ACO), 1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; phone: 425– 

917–6501; fax: 425–917–6590; e-mail: 

kevin.nguyen@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2011–1094; Directorate Identifier 2011– 

NM–070–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD because of those 

comments. 

We will post all comments we 

receive, without change, to http://www.

regulations.gov, including any personal 

information you provide. We will also 

post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

We received reports that inspections 

of the wing center section revealed 


jlentini on DSK4TPTVN1PROD with PROPOSALS