Federal Register / Vol. 75, No. 186 / Monday, September 27, 2010 / Rules and Regulations 59071 

(860) 565–5515; fax: (860) 565–5510, for a 

copy of this service information. You may 

review copies at the FAA, New England 

Region, 12 New England Executive Park, 

Burlington, MA; 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/ 

cfr/ibr-locations.html. 

TABLE 1—INCORPORATION BY REFERENCE

International Aero Engines Service Bulletin No. Page Revision Date 

V2500–ENG–72–0594 ...................................................................................................................... ALL ...... 6 April 12, 2010. 

Total Pages: 61.

V2500–ENG–72–0601 ...................................................................................................................... ALL ...... 2 April 12, 2010. 

Total Pages: 9.

V2500–ENG–72–0603 ...................................................................................................................... ALL ...... 2 March 17, 2010. 

Total pages: 46.

Issued in Burlington, Massachusetts, on 

September 15, 2010. 

Robert J. Ganley, 

Acting Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–23832 Filed 9–24–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0439; Directorate 

Identifier 2010–NM–029–AD; Amendment 

39–16437; AD 2010–20–03] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model CL–600–2B16 (CL–604 

Variants (Including CL–605 Marketing 

Variant)) 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: 

Following five reported cases of * * * 

balance washer screw failure on similar 

ADGs [air-driven generators]/ram air turbines 

installed on other aircraft types, investigation 

by Hamilton Sundstrand determined that a 

specific batch of the screws had a 

metallographic non-conformity that 

increased their susceptibility to brittle 

fracture. * * * 

Failure of a balance washer screw can 

result in loss of the related balance washer, 

with consequent turbine imbalance. Such 

imbalance could potentially result in ADG 

structural failure (including blade failure), 

loss of ADG electrical power and structural 

damage to the aircraft and, if deployment was 

activated by a dual engine shutdown, could 

also result in loss of hydraulic power for the 

flight controls [and consequent reduced 

ability of the flightcrew to maintain the safe 

flight and landing of the airplane]. 

* * * * * 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

November 1, 2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of November 1, 2010. 

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: 

Christopher Alfano, 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– 

7340; 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 June 2, 2010 (75 FR 30740). 

That NPRM proposed to correct an 

unsafe condition for the specified 

products. The MCAI states: 

Following five reported cases of * * * 

balance washer screw failure on similar 

ADGs [air-driven generators]/ram air turbines 

installed on other aircraft types, investigation 

by Hamilton Sundstrand determined that a 

specific batch of the screws had a 

metallographic non-conformity that 

increased their susceptibility to brittle 

fracture. Subsequently, it was established 

that 152 ‘‘dry’’ ADGs [Hamilton Sundstrand 

Part Numbers (P/Ns) in the 761339 series and 

1711405; see Note] either had nonconforming screws installed during 

production or possibly during maintenance 

or repair at Hamilton Sundstrand repair 

stations. 

Failure of a balance washer screw can 

result in loss of the related balance washer, 

with consequent turbine imbalance. Such 

imbalance could potentially result in ADG 

structural failure (including blade failure), 

loss of ADG electrical power and structural 

damage to the aircraft and, if deployment was 

activated by a dual engine shutdown, could 

also result in loss of hydraulic power for the 

flight controls [and consequent reduced 

ability of the flightcrew to maintain the safe 

flight and landing of the airplane]. 

This [Canadian] directive mandates 

checking of the ADG and replacing the 

balance washer screws, if required. It also 

prohibits future installation of unmodified 

ADGs. 

Note: ADGs with Hamilton Sundstrand 

P/Ns in the 761339 series and 1711405 are 

installed on the aircraft model listed in the 

Applicability section above in addition to 

Bombardier Inc. Models CL–600–2B19, CL– 

600–2C10 and CL–600–2D24. The latter three 

models are covered in a separate directive. 

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 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. 

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. 

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59072 Federal Register / Vol. 75, No. 186 / Monday, September 27, 2010 / Rules and Regulations 

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 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 will affect 

155 products of U.S. registry. We also 

estimate that it will take about 10 workhours per product to comply with the 

basic requirements of this AD. The 

average labor rate is $85 per work-hour. 

Required parts will 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 this AD 

to the U.S. operators to be $131,750, 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 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: 

2010–20–03 Bombardier, Inc.: Amendment 

39–16437. Docket No. FAA–2010–0439; 

Directorate Identifier 2010–NM–029–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective November 1, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

Model CL–600–2B16 (CL–604 Variant) 

airplanes; certificated in any category; serial 

numbers (S/N) 5408 and subsequent. 

Note 1: Some Model CL–600–2B16 (CL– 

604 Variant) airplanes might be referred to by 

a marketing designation of CL–605. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 24: Electrical power. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Following five reported cases of * * * 

balance washer screw failure on similar 

ADGs [air-driven generators]/ram air turbines 

installed on other aircraft types, investigation 

by Hamilton Sundstrand determined that a 

specific batch of the screws had a 

metallographic non-conformity that 

increased their susceptibility to brittle 

fracture. Subsequently, it was established 

that 152 ‘‘dry’’ ADGs [Hamilton Sundstrand 

Part Numbers (P/Ns) in the 761339 series and 

1711405; see Note] either had nonconforming screws installed during 

production or possibly during maintenance 

or repair at Hamilton Sundstrand repair 

stations. 

Failure of a balance washer screw can 

result in loss of the related balance washer, 

with consequent turbine imbalance. Such 

imbalance could potentially result in ADG 

structural failure (including blade failure), 

loss of ADG electrical power and structural 

damage to the aircraft and, if deployment was 

activated by a dual engine shutdown, could 

also result in loss of hydraulic power for the 

flight controls [and consequent reduced 

ability of the flightcrew to maintain the safe 

flight and landing of the airplane]. 

This [Canadian] directive mandates 

checking of the ADG and replacing the 

balance washer screws, if required. It also 

prohibits future installation of unmodified 

ADGs. 

Note: ADGs with Hamilton Sundstrand 

P/Ns in the 761339 series and 1711405 are 

installed on the aircraft model listed in the 

Applicability section above in addition to 

Bombardier Inc. Models CL–600–2B19, CL– 

600–2C10 and CL–600–2D24. The latter three 

models are covered in a separate directive. 

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) At the earliest of the times identified in 

paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of 

this AD, do an inspection to determine the 

serial number of the installed ADG. A review 

of airplane maintenance records is acceptable 

in lieu of this inspection if the serial number 

of the ADG can be conclusively determined 

from that review. 

(1) Within 400 flight hours or 12 months 

after the effective date of this AD, whichever 

occurs first, or 

(2) Prior to the next in-flight or on-ground 

functional test of the ADG, whichever occurs 

first after the effective date of this AD, or 

(3) Prior to the next in-flight or on-ground 

operational test of the ADG, whichever 

occurs first after the effective date of this AD, 

or 

(4) Prior to the next scheduled ADG inflight deployment. 

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Federal Register / Vol. 75, No. 186 / Monday, September 27, 2010 / Rules and Regulations 59073 

(h) If the ADG serial number, as 

determined in paragraph (g) of this AD, is not 

listed in paragraph 1.A of the applicable 

Bombardier service bulletin listed in Table 1 

of this AD, no further action is required by 

this AD, except as required by paragraph (j) 

of this AD. 

TABLE 1—SERVICE BULLETINS

Model— 

Bombardier 

Service 

Bulletin— 

Dated— 

CL–600–2B16 (CL–604) airplanes .................................................................................................................. 604–24–021 July 13, 2009. 

CL–600–2B16 (CL–605) airplanes .................................................................................................................. 605–24–001 July 13, 2009. 

(i) If the ADG serial number determined in 

paragraph (g) of this AD is identified in 

paragraph 1.A. of the applicable service 

bulletin listed in Table 1 of this AD, before 

further flight, do an inspection to determine 

if the symbol ‘‘24–5’’ is marked on the ADG 

identification plate. A review of airplane 

maintenance records is acceptable in lieu of 

this inspection if the symbol ‘‘24–5’’ can be 

conclusively determined from that review. 

(1) If the symbol ‘‘24–5’’ is marked on the 

ADG identification plate, and the balance 

washer screws have already been replaced, 

no further action is required by this AD, 

except as required by paragraph (j) of this 

AD. 

(2) If the symbol ‘‘24–5’’ is not marked on 

the ADG identification plate, before further 

flight, replace all balance washer screws with 

new screws having part number MS24667–14 

and mark the ADG identification plate with 

symbol ‘‘24–5’’, in accordance with the 

Accomplishment Instructions of the 

applicable service bulletin listed in Table 1 

of this AD. 

(j) As of the effective date of this AD, no 

person may install on any airplane a 

replacement or spare ADG, Hamilton 

Sundstrand part number in the 761339 or 

1711405 series, having one of the serial 

numbers identified in paragraph 1.A. of the 

applicable service bulletin listed in Table 1 

of this AD, unless the ADG is identified with 

the symbol ‘‘24–5’’ on the identification plate. 

FAA AD Differences 

Note 2: This AD differs from the MCAI 

and/or service information as follows: The 

MCAI specifies to inspect only airplanes 

having certain serial numbers that are part of 

the MCAI applicability. Because the affected 

part could be rotated onto any of the 

airplanes listed in the applicability, this AD 

requires the inspection be done on all 

airplanes. We have coordinated this 

difference with TCCA. 

Other FAA AD Provisions 

(k) 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. Send information 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 

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. 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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), the Office of 

Management and Budget (OMB) has 

approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(l) Refer to MCAI Canadian Airworthiness 

Directive CF–2009–50, dated December 17, 

2009; and Bombardier Service Bulletins 604– 

24–021, dated July 13, 2009, and 605–24– 

001, dated July 13, 2009; for related 

information. 

Material Incorporated by Reference 

(m) You must use Bombardier Service 

Bulletin 604–24–021, dated July 13, 2009; or 

Bombardier Service Bulletin 605–24–001, 

dated July 13, 2009; as applicable; 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. 

(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 

September 10, 2010. 

Jeffrey E. Duven, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–23742 Filed 9–24–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0375; Directorate 

Identifier 2010–NM–014–AD; Amendment 

39–16443; AD 2010–20–09] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model CL–600–2B19 (Regional Jet 

Series 100 & 440) Airplanes; Model 

CL–600–2C10 (Regional Jet Series 700, 

701, & 702) Airplanes; Model CL–600– 

2D15 (Regional Jet Series 705) and 

Model 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: 

Following five reported cases of balance 

washer screw failure on similar ADGs [airdriven generators]/ram air turbines installed 

on other aircraft types, investigation by 

Hamilton Sundstrand determined that a 

specific batch of the screws had a 

metallographic non-conformity that 

increased their susceptibility to brittle 

fracture. * * * 

Failure of a balance washer screw can 

result in loss of the related balance washer, 

mstockstill on DSKH9S0YB1PROD with RULES