2662 Federal Register / Vol. 77, No. 12 / Thursday, January 19, 2012 / Proposed Rules 

assembly having P/N 3–1571–3 or 3–1571–4, 

unless it has been inspected, measured, and 

re-identified, in accordance with paragraph 

(g) of this AD, and all applicable repairs or 

replacements have been done. 

(i) Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

Actions done before the effective date of 

this AD in accordance with Cessna Service 

Bulletin SB560XL–32–41, dated February 25, 

2011, are acceptable for compliance with the 

corresponding requirements of this AD. 

(j) No Reporting Required 

Although Cessna Service Bulletin 

SB560XL–32–41, Revision 1, dated May 5, 

2011, specifies to submit certain information 

to the manufacturer, this AD does not 

include that requirement. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Wichita Aircraft 

Certification Office (ACO), 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 manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

(2) 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. 

(l) Related Information 

(1) For more information about this AD, 

contact David Fairback, Aerospace Engineer, 

Mechanical Systems and Propulsion Branch, 

ACE–116W, FAA, Wichita Aircraft 

Certification Office, 1801 Airport Road, 

Room 100, Mid-Continent Airport, Wichita, 

KS 67209; phone: (316) 946–4154; fax: (316) 

946–4107; email: david.fairback@faa.gov. 

(2) For Cessna service information 

identified in this AD, contact Cessna Aircraft 

Co., P.O. Box 7706, Wichita, Kansas 67277; 

telephone (316) 517–6215; fax (316) 517– 

5802; email 

citationpubs@cessna.textron.com; Internet 

https://www.cessnasupport.com/ 

newlogin.html. For Goodrich service 

information identified in this proposed AD, 

contact Goodrich Corporation, Aircraft 

Wheels & Brakes, P.O. Box 340, Troy, Ohio 

45373–3872; telephone (937) 440–2130; fax 

(937) 440–2055; email WBPubsAdmin@goodrich.com; Internet http:// 

www.goodrich.com/TechPubs. You may 

review copies of the referenced service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Ave. SW., Renton, 

WA. For information on the availability of 

this material at the FAA, call (425) 227–1221. 

Issued in Renton, Washington, on January 

6, 2012. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–855 Filed 1–18–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1416; Directorate 

Identifier 2011–NM–156–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. 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 

Bombardier, Inc. Model CL–600–2C10 

(Regional Jet Series 700, 701, & 702); 

CL–600–2D15 (Regional Jet Series 705); 

CL–600–2D24 (Regional Jet Series 900); 

and CL–600–2E25 (Regional Jet Series 

1000) airplanes. This proposed AD was 

prompted by reports of deformation of 

the pressure regulator on the oxygen 

cylinder, which was attributed to 

batches of raw material that did not 

meet required tensile strength. This 

proposed AD would require an 

inspection to determine if certain 

oxygen pressure regulators are installed, 

and replacement of oxygen cylinder and 

regulator assemblies (CRAs) containing 

pressure regulators that do not meet 

required material properties. We are 

proposing this AD to prevent elongation 

of the pressure regulator neck, which 

could result in rupture of the oxygen 

cylinder, and in the case of cabin 

depressurization, oxygen would not be 

available when required. 

DATES: We must receive comments on 

this proposed AD by March 5, 2012. 

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; 

email 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 (ACO), 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–2011–1416; Directorate Identifier 

2011–NM–156–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. 


EMCDONALD on DSK29S0YB1PROD with PROPOSALS
Federal Register / Vol. 77, No. 12 / Thursday, January 19, 2012 / Proposed Rules 2663 

Discussion 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2011–28, 

dated July 28, 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) of a BD–700– 

1A11 aeroplane. 

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 

would not be available when required. 

Although there have been no reported 

failures to date on any CL–600–2C10, CL– 

600–2D15, CL–600–2D24 or CL–600–2E25 

aeroplanes, similar oxygen pressure 

regulators, Part Number (P/N) 806370–06, 

could also be installed on the aeroplanes 

listed in the Applicability section of this 

[TCCA] directive. 

This [TCCA] directive mandates [an 

inspection for certain serial numbers, and if 

necessary, replacement of the affected oxygen 

CRA in accordance with the accomplishment 

instructions of Bombardier Service Bulletin 

670BA–35–011, dated July 5, 2011; and] the 

replacement of oxygen CRAs containing 

pressure regulators 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 

Bulletin 670BA–35–011, dated July 5, 

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 

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. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 263 products of U.S. 

registry. We also estimate that it would 

take about 2 work-hours per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $85 per work-hour. 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 

$44,710, or $170 per product. 

In addition, we estimate that any 

necessary follow-on actions would take 

about 1 work-hour and require parts 

costing $0, for a cost of $85 per product. 

We have no way of determining the 

number of products that may need these 

actions. 

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); 

3. Will not affect intrastate aviation in 

Alaska; and 

4. 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– 

1416; Directorate Identifier 2011–NM– 

156–AD. 

(a) Comments Due Date 

We must receive comments by March 5, 

2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the airplanes identified 

in paragraphs (c)(1), (c)(2), and (c)(3) of this 

AD, certificated in any category. 

(1) Bombardier, Inc. Model CL–600–2C10 

(Regional Jet Series 700, 701, & 702) 

airplanes, serial numbers 10002 through 

10999 inclusive. 

(2) Bombardier, Inc. Model CL–600–2D15 

(Regional Jet Series 705) and CL–600–2D24 

(Regional Jet Series 900) airplanes, serial 

numbers 15001 through 15990 inclusive. 

(3) Bombardier, Inc. Model CL–600–2E25 

(Regional Jet Series 1000) airplanes, serial 

numbers 19001 through 19990 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 35: Oxygen. 

(e) Reason 

This AD was prompted by reports of 

deformation of the pressure regulator on the 

oxygen cylinder, which was attributed to 

batches of raw material that did not meet 

required tensile strength. We are issuing this 


EMCDONALD on DSK29S0YB1PROD with PROPOSALS
2664 Federal Register / Vol. 77, No. 12 / Thursday, January 19, 2012 / Proposed Rules 

AD to prevent elongation of the pressure 

regulator neck, which could result in rupture 

of the oxygen cylinder, and in the case of 

cabin depressurization, oxygen would not be 

available when required. 

(f) Compliance 

You are responsible for having the actions 

required by this AD performed within the 

compliance times specified, unless the 

actions have already been done. 

(g) Actions 

Within 1,800 flight hours or 6 months after 

the effective date of this AD, whichever 

occurs first: Inspect the serial number of each 

oxygen pressure regulator, part number (P/N) 

806370–06, to determine if the serial number 

of the regulator is listed in ‘‘Table 2, 

Regulators’’ of paragraph 1.A.(1) of 

Bombardier Service Bulletin 670BA–35–011, 

dated July 5, 2011. If the serial number of the 

oxygen pressure regulator, P/N 806370–06, is 

listed in ‘‘Table 2, Regulators’’ of paragraph 

1.A.(1) of Bombardier Service Bulletin 

670BA–35–011, dated July 5, 2011, before 

further flight: Replace the affected oxygen 

cylinder and regulator assembly (CRA), in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

670BA–35–011, dated July 5, 2011. 

(h) Parts Installation 

As of the effective date of this AD, no 

person may install an oxygen pressure 

regulator, P/N 806370–06, having a serial 

number listed in ‘‘Table 2, Regulators’’ of 

paragraph 1.A.(1) of Bombardier Service 

Bulletin 670BA–35–011, dated July 5, 2011, 

on any airplane unless the serial number of 

the CRA and pressure regulator have a suffix 

‘‘A’’ beside the serial number. 

(i) Other FAA AD Provisions 

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. 

(j) Related Information 

Refer to MCAI Canadian Airworthiness 

Directive CF–2011–28, dated July 28, 2011; 

and Bombardier Service Bulletin 670BA–35– 

011, dated July 5, 2011; for related 

information. 

Issued in Renton, Washington, on January 

6, 2012. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–857 Filed 1–18–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1415; Directorate 

Identifier 2011–NM–145–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 all The 

Boeing Company Model 717–200 

airplanes. This proposed AD was 

prompted by reports of cracks found on 

the center section ribs of the horizontal 

stabilizers. This proposed AD would 

require repetitive inspections for 

cracking of the aft face of the left and 

right rib hinge bearing lugs of the center 

section of the horizontal stabilizer; and 

crack measurement, repairs, and 

installation of a new center section rib 

if necessary. We are proposing this AD 

to detect and correct cracks in the left 

and right bearing lugs of the rib hinge 

spreading at the same time, which could 

result in failure of both hinge bearing 

lugs. Failure of the hinge bearing lugs 

could result in the inability of the 

horizontal stabilizer to sustain flight 

loads and therefore reduce the 

controllability of the airplane. 

DATES: We must receive comments on 

this proposed AD by March 5, 2012. 

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, 3855 

Lakewood Boulevard, MC D800–0019, 

Long Beach, California 90846–0001; 

phone: (206) 544–5000, extension 2; fax: 

(206) 766–5683; email: 

dse.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: 

George Garrido, Aerospace Engineer, 

Airframe Branch, ANM–120L, FAA, Los 

Angeles Aircraft Certification Office 

(ACO), 3960 Paramount Boulevard, 

Lakewood, California 90712–4137; 

phone: (562) 627–5357; fax: (562) 627– 

5210; email: George.Garrido@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– 

2011–1415; Directorate Identifier 2011– 

NM–145–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 


EMCDONALD on DSK29S0YB1PROD with PROPOSALS