31174 Federal Register / Vol. 77, No. 102 / Friday, May 25, 2012 / Rules and Regulations 

0272; or at http://www.bellcustomer.com/ 

files/. 

(3) You may review a copy of the 

referenced service information at the FAA, 

Office of the Regional Counsel, Southwest 

Region, 2601 Meacham Blvd., Room 663, Fort 

Worth, Texas 76137 or at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at NARA, call (202) 741– 

6030, or go to: http://www.archives.gov/ 

federal_register/code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Fort Worth, Texas, on May 10, 

2012. 

Kim Smith, 

Manager, Rotorcraft Directorate, Aircraft 

Certification Service. 

[FR Doc. 2012–12399 Filed 5–24–12; 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; Amendment 

39–17056; AD 2012–10–07] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting 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 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 AD 

requires 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 issuing 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: This AD becomes effective June 

29, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of June 29, 2012. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at the 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue SE., 

Washington, DC. 

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: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on January 19, 2012 (77 FR 

2662). That NPRM proposed 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 

[Transport Canada Civil Aviation (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. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM (77 

FR 2662, January 19, 2012) or on the 

determination of the cost to the public. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed, except for minor editorial 

changes. We have determined that these 

minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (77 FR 2662, 

January 19, 2012) for correcting the 

unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (77 FR 2662, 

January 19, 2012). 

Costs of Compliance 

We estimate that this AD will affect 

263 products of U.S. registry. We also 

estimate that it will take about 2 workhours per product to comply with the 

basic requirements of this AD. The 

average labor rate is $85 per work-hour. 

Based on these figures, we estimate the 

cost of this AD to the 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 AD will not 

have federalism implications under 

Executive Order 13132. This AD will 

not have a substantial direct effect on 

the States, on the relationship between 

the national government and the States, 


wreier-aviles on DSK5TPTVN1PROD with RULES
Federal Register / Vol. 77, No. 102 / Friday, May 25, 2012 / Rules and Regulations 31175 

or on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

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 AD and placed it in the AD docket. 

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 the NPRM (77 FR 2662, 

January 19, 2012), 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. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of the Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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: 

2012–10–07 Bombardier, Inc.: Amendment 

39–17056. Docket No. FAA–2011–1416; 

Directorate Identifier 2011–NM–156–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective June 29, 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 

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. 

(k) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) of the 

following service information under 5 U.S.C. 

552(a) and 1 CFR part 51: 

(i) Bombardier Service Bulletin 670BA–35– 

011, dated July 5, 2011. 

(2) For service information identified in 

this AD, contact Bombardier, Inc., 400 CoˆteVertu 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. 

(3) You may review copies of the 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. 

(4) You may also review copies of the 

service information that is incorporated by 

reference at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at an NARA facility, call 202–741– 

6030, or go to http://www.archives.gov/ 

federal_register/code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on May 10, 

2012. 

Michael Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–12333 Filed 5–24–12; 8:45 am] 

BILLING CODE 4910–13–P 


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