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

19902 

Vol. 74, No. 82 

Thursday, April 30, 2009 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0399; Directorate 

Identifier 2008–NM–226–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier 

Model CL–600–2C10 (Regional Jet 

Series 700, 701 & 702), CL–600–2D15 

(Regional Jet Series 705), and CL–600– 

2D24 (Regional Jet Series 900) 

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: 

A change in dimensions of the fuse blocks 

in the Auxiliary Power Unit (APU) Start 

Contactor Assembly (ASCA) box assembly 

can cause an incorrect interface between the 

bus bars and fuses. This condition can result 

in an increase in temperature, which could 

damage the ASCA box and/or compromise 

the availability of battery bus supply. 

The unsafe condition could result in the 

ignition of a fire in the ASCA box. 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 June 1, 2009. 

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 

W12–40, 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 or 425–227–1152. 

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: 

Wing Chan, Aerospace Engineer, 

Systems and Flight Test Branch, ANE– 

172, FAA, New York Aircraft 

Certification Office, 1600 Stewart 

Avenue, Suite 410, Westbury, New York 

11590; telephone (516) 228–7311; 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–2009–0399; Directorate Identifier 

2008–NM–226–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 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2008–34, 

dated December 2, 2008 (referred to 

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

unsafe condition for the specified 

products. The MCAI states: 

A change in dimensions of the fuse blocks 

in the Auxiliary Power Unit (APU) Start 

Contactor Assembly (ASCA) box assembly 

can cause an incorrect interface between the 

bus bars and fuses. This condition can result 

in an increase in temperature, which could 

damage the ASCA box and/or compromise 

the availability of battery bus supply. 

The unsafe condition could result in the 

ignition of a fire in the ASCA box. The 

required actions include inspecting the 

ASCA boxes to determine the part 

number; and for certain ASCA boxes, 

doing a detailed inspection of the fuse 

block date code, and replacement of the 

fuse block with new hardware if 

necessary. You may obtain further 

information by examining the MCAI in 

the AD docket. 

Relevant Service Information 

Bombardier has issued Service 

Bulletin 670BA–49–012, Revision A, 

dated August 28, 2008. 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 

Federal Register / Vol. 74, No. 82 / Thursday, April 30, 2009 / Proposed Rules 19903 

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 108 products of U.S. 

registry. We also estimate that it would 

take about 5 work-hours per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $80 per work-hour. Based on 

these figures, we estimate the cost of the 

proposed AD on U.S. operators to be 

$43,200, or $400 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 (Formerly Canadair): Docket 

No. FAA–2009–0399; Directorate 

Identifier 2008–NM–226–AD. 

Comments Due Date 

(a) We must receive comments by June 1, 

2009. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to the airplanes, 

certificated in any category, identified in 

paragraphs (c)(1) and (c)(2) of this AD. 

(1) Bombardier Model CL–600–2C10 

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

numbers 10112 through 10199, and 10201 

through 10206. 

(2) Bombardier Model CL–600–2D15 

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

(Regional Jet Series 900), serial numbers 

15007 through 15026, 15030, and 15031. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 49: Airborne Auxiliary Power. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

A change in dimensions of the fuse blocks 

in the Auxiliary Power Unit (APU) Start 

Contactor Assembly (ASCA) box assembly 

can cause an incorrect interface between the 

bus bars and fuses. This condition can result 

in an increase in temperature, which could 

damage the ASCA box and/or compromise 

the availability of battery bus supply. 

The unsafe condition could result in the 

ignition of a fire in the ASCA box. The 

required actions include inspecting the 

ASCA boxes to determine the part number; 

and for certain ASCA boxes, doing a detailed 

inspection of the fuse block date code, and 

replacement of the fuse block with new 

hardware if necessary. 

Actions and Compliance 

(f) Unless already done, do the following 

actions: 

(1) Within 1,500 flight hours after the 

effective date of this AD, perform an 

inspection of the ASCA box to determine the 

part number and, for ASCA boxes having part 

number BA670–53328–1 or BA670–53328– 

951, perform a detailed inspection of the fuse 

block date code, in accordance with 

Bombardier Service Bulletin 670BA–49–012, 

Revision A, dated August 28, 2008. Before 

further flight, replace all fuse blocks that 

have a date code between K23 (0323) through 

M08 (0508) inclusive, in accordance with 

Bombardier Service Bulletin 670BA–49–012, 

Revision A, dated August 28, 2008. 

(2) Inspections and replacement actions are 

also acceptable for compliance with the 

requirements of paragraph (f)(1) of this AD, 

if done before the effective date of this AD 

in accordance with Bombardier Service 

Bulletin 670BA–49–012, dated June 28, 2007. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: No 

Differences. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, Systems and Flight 

Test Branch, ANE–172, FAA, has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. Send information to ATTN: Wing 

Chan, Aerospace Engineer, Systems and 

Flight Test Branch, ANE–172, FAA, New 

York Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, New 

York 11590; telephone (516) 228–7311; fax 

(516) 794–5531. Before using any approved 

AMOC on any airplane to which the AMOC 

applies, notify your principal maintenance 

inspector (PMI) or principal avionics 

inspector (PAI), as appropriate, or lacking a 

principal inspector, your local Flight 

Standards District Office. 

(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. 

19904 Federal Register / Vol. 74, No. 82 / Thursday, April 30, 2009 / Proposed Rules 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act, 

the Office of Management and Budget (OMB) 

has approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(h) Refer to MCAI Transport Canada Civil 

Aviation Airworthiness Directive CF–2008– 

34, dated December 2, 2008; and Bombardier 

Service Bulletin 670BA–49–012, Revision A, 

dated August 28, 2008; for related 

information. 

Issued in Renton, Washington, on April 22, 

2009. 

Stephen P. Boyd, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E9–9866 Filed 4–29–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2007–29060; Directorate 

Identifier 2007–NE–34–AD] 

RIN 2120–AA64 

Airworthiness Directives; International 

Aero Engines (IAE) 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

IAE V2500–A1, V2527E–A5, V2527M– 

A5, V2528–D5, V2530–A5, and V2533– 

A5 turbofan engines. This proposed AD 

would require a onetime inspection of 

certain vortex reducers for cracks, and 

replacing the reducer and high-pressure 

(HP) compressor stage 3–8 drum if the 

reducer is cracked. This proposed AD 

results from reports of fractured vortex 

reducers found at shop visits. We are 

proposing this AD to inspect for cracks 

in the vortex reducer. Cracks in the 

vortex reducer could cause an 

uncontained failure of the HP 

compressor stage 3–8 drum, which 

could result in damage to the airplane. 

DATES: We must receive any comments 

on this proposed AD by June 29, 2009. 

ADDRESSES: Use one of the following 

addresses to comment on this proposed 

AD. 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue, SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

• Fax: (202) 493–2251. 

Contact International Aero Engines, 

400 Main St., East Hartford, CT 06108; 

telephone (860) 565–5515, fax (860) 

565–0600 for a copy of the service 

information identified in this AD. 

FOR FURTHER INFORMATION CONTACT: 

Kevin Dickert, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: kevin_dickert@faa.gov; 

telephone (781) 238–7117; fax (781) 

238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send us any written 

relevant data, views, or arguments 

regarding this proposal. Send your 

comments to an address listed under 

ADDRESSES. Include ‘‘Docket No. FAA– 

2007–29060; Directorate Identifier 

2007–NE–34–AD’’ in the subject line of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of the proposed AD. We will 

consider all comments received by the 

closing date and may amend the 

proposed AD in light 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 with FAA 

personnel concerning this proposed AD. 

Using the search function of the Web 

site, anyone can find and read the 

comments in any of our dockets, 

including, if provided, the name of the 

individual who sent the comment (or 

signed the comment on behalf of an 

association, business, labor union, etc.). 

You may review the DOT’s complete 

Privacy Act Statement in the Federal 

Register published on April 11, 2000 

(65 FR 19477–78). 

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 the 

same as the Mail address provided in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

Discussion 

International Aero Engines has 

informed us that they received reports 

of two fractured vortex reducers found 

at engine shop visits. Those findings 

prompted IAE to perform stress analyses 

and lifing work on both the vortex 

reducer and the HP compressor stage 3– 

8 drum. That work showed that a 

cracked vortex reducer leads to an 

increase in stress levels at the bolt holes 

of the HP compressor stage 3–8 drum. 

For certain stage 3–8 drums, the stress 

increase at the stage 8 bolt holes could 

lead to a reduced drum life depending 

on the drum life when the vortex 

reducer was cracked and the thrust 

rating of the engine. Stage 3–8 drums, 

part numbers (P/Ns) 6A5467, 6A6473, 

and 6A7401, could fail from the 

increased loading caused by a cracked 

vortex reducer. This condition, if not 

corrected, could cause an uncontained 

failure of the HP compressor stage 3–8 

drum, which could result in damage to 

the airplane. 

Relevant Service Information 

We have reviewed and approved the 

technical contents of IAE Service 

Bulletin (SB) V2500–ENG–72–0510, 

Revision 1, dated October 8, 2007, that 

describes procedures for inspecting the 

vortex reducer for cracks. 

FAA’s Determination and Requirements 

of the Proposed AD 

We have evaluated all pertinent 

information and identified an unsafe 

condition that is likely to exist or 

develop on other products of this same 

type design. We are proposing this AD, 

which would require a onetime 

fluorescent penetrant inspection of 

certain vortex reducers for cracks. 

Costs of Compliance 

We estimate that this proposed AD 

would affect no engines installed on 

airplanes of U.S. registry. Based on this, 

we estimate there is no cost to U.S. 

operators for the proposed AD. 

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.