Federal Register / Vol. 74, No. 208 / Thursday, October 29, 2009 / Rules and Regulations 55757 

do the actions required by this AD, unless the 

AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this 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. 

(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 or 425–227–1152. 

(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 NARA, 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 October 

19, 2009. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E9–25916 Filed 10–28–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0399; Directorate 

Identifier 2008–NM–226–AD; Amendment 

39–16060; AD 2009–22–09] 

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), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This 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. We 

are issuing this AD to require actions to 

correct the unsafe condition on these 

products. 

DATES: This AD becomes effective 

December 3, 2009. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of December 3, 2009. 

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: 

Wing Chan, Aerospace Engineer, 

Avionics 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: 

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 April 30, 2009 (74 FR 

19902). That NPRM proposed 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 replacing the fuse 

block with new hardware if necessary. 

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 

considered the comment received. 

Request To Change Compliance Time 

for Replacement 

American Eagle Airlines (AEA) 

requests that the compliance time in 

paragraph (f)(1) of the NPRM for 

replacing the fuse blocks be changed 

from ‘‘before further flight’’ to within 

1,500 flight hours after the effective date 

of this AD. AEA explains that the new 

compliance time will give operators the 

benefit of knowing how much downtime will be needed to replace the fuse 

blocks, while keeping to the restrictions 

of 1,500 flight hours required for 

inspecting the ASCA box. 

We disagree with the request. While 

we recognize that changing the 

compliance time for replacing the fuse 

blocks from ‘‘before further flight’’ to 

within 1,500 flight hours after the 

effective date of this AD benefits the 

operators in their planning, we find 

that, to achieve an adequate level of 

safety for the affected airplanes, fuse 

blocks known to be un-airworthy must 

be replaced before further flight. We 

have made no change to this AD in this 

regard. 

Request To Allow a Records Check in 

Lieu of Inspection To Determine Part 

Number 

AEA requests that a records check be 

allowed, if sufficient records exist, to 

comply with the inspection of the ASCA 

box to determine the part numbers. AEA 

explains that the records check would 

potentially prevent unnecessary 

inspections. 

We agree. We have determined that a 

review of the airplane maintenance 

records is acceptable in lieu of the 

inspection to determine the part number 

of the ASCA boxes if the part number 

of the ASCA boxes can be conclusively 

determined from that review. We have 

revised paragraph (f)(1) of this AD 

accordingly. 

Conclusion 

We reviewed the available data, 

including the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

with the change described previously. 

We determined that this change will not 

increase the economic burden on any 

operator or increase the scope of the AD. 

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 


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55758 Federal Register / Vol. 74, No. 208 / Thursday, October 29, 2009 / Rules and Regulations 

substantively from the information 

provided in the MCAI and related 

service information. 

We might also have required different 

actions in this AD from those in the 

MCAI in order to follow our FAA 

policies. Any such differences are 

highlighted in a NOTE within the AD. 

Costs of Compliance 

We estimate that this AD affects 108 

products of U.S. registry. We also 

estimate that it takes about 5 work-hours 

per product to comply with the basic 

requirements of this AD. The average 

labor rate is $80 per work-hour. Based 

on these figures, we estimate the cost of 

this AD to 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 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, 

or on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify 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); 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 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, 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: 

2009–22–09 Bombardier (Formerly 

Canadair): Amendment 39–16060. 

Docket No. FAA–2009–0399; Directorate 

Identifier 2008–NM–226–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective December 3, 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 inclusive, and 

10201 through 10206 inclusive. 

(2) Bombardier Model CL–600–2D15 

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

(Regional Jet Series 900), serial numbers 

15007 through 15026 inclusive, 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 

replacing 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, inspect the ASCA 

box to determine the part number and, for 

ASCA boxes having part number (P/N) 

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. A review 

of airplane maintenance records is acceptable 

in lieu of the inspection to determine the part 

number of the ASCA boxes if the part 

number of the ASCA boxes can be 

conclusively determined from that review. 

(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, Avionics 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 


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Federal Register / Vol. 74, No. 208 / Thursday, October 29, 2009 / Rules and Regulations 55759 

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. 

(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. 

Material Incorporated by Reference 

(i) You must use Bombardier Service 

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

August 28, 2008, to do the actions required 

by this AD, unless the AD specifies 

otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(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; e-mail 

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 or 425–227–1152. 

(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 NARA, 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 October 

19, 2009. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E9–25648 Filed 10–28–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0045; Directorate 

Identifier 2007–NE–53–AD; Amendment 39– 

16041; AD 2009–21–04] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Model 

BR700–715A1–30, BR700–715B1–30, 

and BR700–715C1–30 Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued 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: 

Repair Scheme BRG3086 Issue 1 instructs 

the repair of the High-Pressure (HP) 

Compressor Front Drum Assembly Damping 

Grooves. This repair has an impact on the life 

of the HP Compressor Front Drum Assembly. 

We are issuing this AD to prevent 

failure of front HP compressor rotors, 

which could result in an uncontained 

engine failure and damage to the 

airplane. 

DATES: This AD becomes effective 

December 3, 2009. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 1200 New Jersey 

Avenue, SE., West Building Ground 

Floor, Room W12–140, Washington, DC 

20590–0001. 

FOR FURTHER INFORMATION CONTACT: 

Jason Yang, Aerospace Engineer, Engine 

Certification Office, FAA, Engine and 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail jason.yang@faa.gov; telephone 

(781) 238–7747; fax (781) 238–7199. 

Contact Rolls-Royce Deutschland Ltd 

& Co KG, Eschenweg 11, Dahlewitz, 

15827 Blankenfelde-Mahlow, Germany; 

telephone 49 (0) 33–7086–1768; fax 49 

(0) 33–7086–3356, or go to: http:// 

www.rolls-royce.com/deutschland/en/ 

default.htm, for a copy of the service 

information referenced in this AD. 

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 February 12, 2009 (74 FR 

7004). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states that: 

Repair Scheme BRG3086 Issue 1 instructs 

the repair of the HP Compressor Front Drum 

Assembly Damping Grooves. This repair has 

an impact on the life of the HP Compressor 

Front Drum Assembly. This emergency 

airworthiness directive has been raised to 

mandate certain specific CAUTION notes 

related to specific subtasks of the BR715 

Time Limits Manual (TLM) T–715–3BR 

instructing a reduced life for certain Serial 

Numbers (SN) of the HP Compressor Front 

Drum Assemblies Part No. BRH20070 after 

repair BRG3086 Issue 1 has been applied and 

Part No. BRR21918 after repair BRG3086 

Issue 1 has been applied. Results for each 

individual repair case are listed in the latest 

revision of Non-Modification Service 

Bulletin SB–BR700–72–A900437. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Since we issued the proposed AD, we 

found it necessary to add a column to 

Table 1 for affected HP compressor rotor 

front disc assemblies operating under 

the C1–30 derated design engine 

mission. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

with the change described previously. 

Differences Between This AD and the 

MCAI or Service Information 

We have found it necessary to differ 

from the MCAI as follows: 

• We don’t require operators to 

amend the Time Limits Manual. 

• We don’t allow the operators to 

show compliance by using RRD ASB 

SB–BR700–72–A900437, initial issue, 

dated February 26, 2007. Some of the 

affected parts are not included in the 

initial issue of the ASB. 

• We have incorporated in this AD, 

the life reduction Table for the HPC 

drum assemblies, by serial number (SN), 

that are specified in RRD ASB SB– 

BR700–72–A900437, Revision 2, dated 

September 17, 2009. 

• HPC drum assembly, P/N 

BRH20070 is not affected by the AD; 

since only certain HPC drums with P/ 

N BRR21918 were affected in 


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