Federal Register / Vol. 75, No. 170 / Thursday, September 2, 2010 / Rules and Regulations 53851 

Actions 

(g) Within 500 flight cycles after the 

effective date of this AD: Inspect HSTAs 

having P/Ns 8489–7 and 8489–7R to 

determine if the serial numbers (S/Ns) 

identified in paragraph 1.A., ‘‘Effectivity,’’ of 

Bombardier Service Bulletin 670BA–27–057, 

dated June 14, 2010, are installed. A review 

of airplane maintenance records is acceptable 

in lieu of this inspection if the serial number 

of the HSTA can be conclusively determined 

from that review. 

(1) For any HSTA with a serial number that 

is not identified in paragraph 1.A., 

‘‘Effectivity,’’ of Bombardier Service Bulletin 

670BA–27–057, dated June 14, 2010: No 

further action is required by paragraph (g) of 

this AD. 

(2) For any HSTA with a serial number that 

is identified in paragraph 1.A., ‘‘Effectivity,’’ 

of Bombardier Service Bulletin 670BA–27– 

057, dated June 14, 2010: Replace the HSTA 

with a serviceable HSTA, in accordance with 

the Accomplishment Instructions of 

Bombardier Service Bulletin 670BA–27–057, 

dated June 14, 2010, at the applicable time 

specified by paragraph (g)(2)(i), (g)(2)(ii), 

(g)(2)(iii), or (g)(2)(iv) of this AD. 

Note 1: Bombardier Service Bulletin 

670BA–27–057, dated June 14, 2010, 

references Sagem SA Service Bulletin 8489– 

27–006, dated December 8, 2009, as an 

additional source of guidance for modifying 

the HSTA. Sagem SA Service Bulletin 8489– 

27–006, dated December 8, 2009, references 

Ratier-Figeac Service Bulletin RF–DSC–075– 

07, Version 03, dated November 10, 2009, as 

an additional source of guidance for 

modifying the HSTA. The suffix ‘‘A’’ after the 

serial number indicates serviceable HSTAs 

that have been modified. 

(i) For any HSTA that has accumulated less 

than or equal to 8,000 flight cycles as of the 

effective date of this AD: Before the HSTA 

accumulates 10,000 flight cycles. 

(ii) For any HSTA that has accumulated 

more than 8,000 flight cycles but less than or 

equal to 10,000 flight cycles as of the 

effective date of this AD: Before the HSTA 

accumulates an additional 2,000 flight cycles, 

but no later than 11,000 flight cycles on the 

HSTA. 

(iii) For any HSTA that has accumulated 

more than 10,000 flight cycles but less than 

or equal to 12,000 flight cycles as of the 

effective date of this AD: Before the HSTA 

accumulates an additional 1,000 flight cycles, 

but no later than 12,500 flight cycles on the 

HSTA. 

(iv) For any HSTAs that has accumulated 

more than 12,000 flight cycles as of the 

effective date of this AD: Before the HSTA 

accumulates an additional 500 flight cycles. 

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

person may install an HSTA, having P/N 

8489–7 or 8489–7R, with a serial number 

identified in paragraph 1.A., ‘‘Effectivity,’’ of 

Bombardier Service Bulletin 670BA–27–057, 

dated June 14, 2010, on any airplane. 

FAA AD Differences 

Note 2: This AD differs from the MCAI 

and/or service information as follows: 

Canadian Airworthiness Directive CF–2010– 

20, dated July 19, 2010, refers to an incorrect 

date of April 28, 2010, for Bombardier 

Service Bulletin 670BA–27–057. The correct 

date for Bombardier Service Bulletin 670BA– 

27–057 is June 14, 2010. 

Other FAA AD Provisions 

(i) 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 ensure 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 

(j) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–20, dated July 19, 2010; 

and Bombardier Service Bulletin 670BA–27– 

057, dated June 14, 2010; for related 

information. 

Material Incorporated by Reference 

(k) You must use Bombardier Service 

Bulletin 670BA–27–057, dated June 14, 2010, 

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 August 

20, 2010. 

Jeffrey E. Duven, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–21563 Filed 9–1–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–1110; Directorate 

Identifier 2009–NM–116–AD; Amendment 

39–16421; AD 2010–18–08] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. 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 superseding an 

existing 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: 

During testing, it was discovered that when 

the outflow valve (OFV) manual mode 

connector is not connected, the manual mode 

motor and altitude limitation are not 

properly tested. Consequently, a disconnect 

of the OFV manual mode and/or a related 

wiring failure could potentially result in a 

dormant loss of several CPC [cabin pressure 

control] backup/safety functions, including 

OFV manual control, altitude limitation, 

emergency depressurization and smoke 

clearance. * * * 

* * * * * 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

October 7, 2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of October 7, 2010. 


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53852 Federal Register / Vol. 75, No. 170 / Thursday, September 2, 2010 / Rules and Regulations 

On May 29, 2009 (74 FR 22646, May 

14, 2009), the Director of the Federal 

Register approved the incorporation by 

reference of certain other publications 

listed in this AD. 

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: 

Fabio Buttitta, 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– 

7303; 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 December 3, 2009 (74 FR 

63333), and proposed to supersede AD 

2009–10–10, Amendment 39–15906 

(74 FR 22646, May 14, 2009). That 

NPRM proposed to correct an unsafe 

condition for the specified products. 

This AD retains the requirements of AD 

2009–10–10 and also requires 

modification (software update) of the 

cabin pressure control units and cabin 

pressure control panels. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comments received. 

Request To Allow Installation of a 

Certain Cabin Pressure Control (CPC) 

Part Number 

After the comment period for the 

NPRM closed, American Eagle Airlines 

(AEA) made an ex parte call to the FAA 

to request that we allow the installation 

of CPC units having part number (P/N) 

GG670–98002–9 that were modified in 

accordance with Bombardier Service 

Bulletin 670BA–21–030, dated 

December 22, 2009, as a method of 

compliance with paragraph (g)(1) of the 

NPRM. AEA did not provide additional 

supporting information to substantiate 

this request. 

We agree with the commenter’s 

request. After contacting Transport 

Canada Civil Aviation (TCCA) for 

further details, we determined that 

installation of certain CPC units 

modified according to Bombardier 

Service Bulletin 670BA–21–030, dated 

December 22, 2009, is acceptable for 

compliance with paragraph (g)(1) of this 

AD. We have added new paragraph (h) 

to this AD to provide this method of 

compliance, and have re-identified 

subsequent paragraphs accordingly. 

Request To Allow Installation of 

Certain Modified CPCs and Cabin 

Pressure Control Panels (CPCPs) 

AEA also requests allowing certain 

CPC units and CPCPs that were 

modified in accordance with certain 

Liebherr service bulletins (identified in 

the following table) as a method of 

compliance with the actions specified in 

paragraphs (g)(1) and (g)(2) of the 

NPRM. AEA states that those Liebherr 

service bulletins were approved as an 

alternative method of compliance 

(AMOC) to AD 2009–10–10. AEA also 

suggests that allowing the use of those 

certain Liebherr service bulletins would 

prevent the need for future AMOCs. 

LIEBHERR SERVICE BULLETINS

Liebherr Service Bulletin— Revision— Dated— 

GG670–98001–21–03 .......................................................................................... Original .................................................. March 21, 2006. 

GG670–98001–21–03 .......................................................................................... 1 ............................................................ November 15, 2007. 

GG670–98002–21–02 .......................................................................................... Original .................................................. April 21, 2006. 

GG670–98002–21–02 .......................................................................................... 1 ............................................................ November 15, 2007. 

We partially agree with the 

commenter’s request. Since these 

Liebherr service bulletins were 

referenced as sources of additional 

guidance in Bombardier Service 

Bulletin A670BA–21–022, dated August 

3, 2006, that was required by AD 2009– 

10–10, we agree to provide credit for 

actions done according to those Liebherr 

service bulletins if the actions were 

accomplished before the effective date 

of AD 2009–10–10. We have added 

paragraph (i) to this AD to provide this 

credit. 

Explanation of Change to Applicability 

We have revised the NPRM to identify 

the legal name of the manufacturer as 

published in the most recent type 

certificate data sheet for the affected 

airplane models. 

Explanation of Change to AMOC 

Paragraph 

We have revised paragraph (j)(1) of 

this AD to give credit for AMOCs 

approved previously for AD 2009–10– 

10. 

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 changes described previously. 

We determined that these changes 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 

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. 

Explanation of Change to Costs of 

Compliance 

Since issuance of the NPRM, we have 

increased the labor rate used in the 

Costs of Compliance from $80 per workhour to $85 per work-hour. The Costs of 

Compliance information, below, reflects 

this increase in the specified hourly 

labor rate. 

Costs of Compliance 

We estimate that this AD will affect 

about 353 products of U.S. registry. 

The actions that are required by AD 

2009–10–10 and retained in this AD 

take about 2 work-hours per product, at 

an average labor rate of $85 per work 

hour. Based on these figures, the 

estimated cost of the currently required 

actions is $170 per product. 


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We estimate that it will take about 3 

work-hours per product to comply with 

the new basic requirements of this AD. 

The average labor rate is $85 per workhour. Required parts will cost about 

$43,000 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 costs. 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 

$15,269,015, or $43,255 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 

removing Amendment 39–15906 (74 FR 

22646, May 14, 2009) and adding the 

following new AD: 

2010–18–08 Bombardier, Inc: Amendment 

39–16421. Docket No. FAA–2009–1110; 

Directorate Identifier 2009–NM–116–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective October 7, 2010. 

Affected ADs 

(b) This AD supersedes AD 2009–10–10, 

Amendment 39–15906. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

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

701, & 702) airplanes, certificated in any 

category, serial numbers 10003 through 

10260 inclusive; and Model CL–600–2D15 

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

(Regional Jet Series 900) airplanes, 

certificated in any category, serial numbers 

15001 through 15095 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 21: Air Conditioning. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

During testing, it was discovered that when 

the outflow valve (OFV) manual mode 

connector is not connected, the manual mode 

motor and altitude limitation are not 

properly tested. Consequently, a disconnect 

of the OFV manual mode and/or a related 

wiring failure could potentially result in a 

dormant loss of several CPC [cabin pressure 

control] backup/safety functions, including 

OFV manual control, altitude limitation, 

emergency depressurization and smoke 

clearance. This deficiency is applicable to 

CPC units, Part Number (P/N) GG670–98002– 

3 and –5, and CPCP [cabin pressure control 

panel], Part Number GG670–98001–5, –7 and 

–9. 

This [Canadian] directive mandates an 

interim repetitive check of the OFV manual 

mode motor and altitude limitation 

functions, followed by modification (software 

update) of the CPC units and the CPCP. 

The corrective action for findings of 

improper OFV manual mode motor and 

altitude limitation functions is replacing the 

valve with a new or serviceable valve. 

Restatement of Requirements of AD 2009– 

10–10 

Actions and Compliance 

(f) Unless already done, do the following 

actions. Within 450 flight hours after May 29, 

2009 (the effective date of AD 2009–10–10), 

inspect the OFV for proper operation of the 

manual mode motor and altitude limitation 

functions, in accordance with Part A of the 

Accomplishment Instructions of Bombardier 

Alert Service Bulletin A670BA–21–022, 

dated August 3, 2006 (‘‘the service bulletin’’). 

If the OFV manual mode motor or altitude 

limitation functions do not operate properly, 

before further flight, do the actions specified 

in paragraphs (f)(1) and (f)(2) of this AD. 

Repeat the inspection thereafter at intervals 

not to exceed 450 flight hours. 

Accomplishing the actions specified in 

paragraph (g) of this AD terminates the 

requirements of this paragraph. 

(1) Make sure that the electrical 

connectors, MPE23P1 and MPE23P2, are 

connected to the OFV. 

(2) Repeat the inspection of the OFV for 

proper operation of the manual mode motor 

and altitude limitation functions, in 

accordance with Part A of the service 

bulletin. If the OFV manual mode motor or 

altitude limitation functions do not operate 

properly, before further flight, replace the 

OFV with a new or serviceable valve in 

accordance with Tasks 21–32–01–000–801 

and 21–32–01–400–801 of the Bombardier 

CRJ Regional Jet Series Aircraft Maintenance 

Manual, CSP B–001, Part 2, Volume 1, 

Revision 28, dated January 20, 2009, and do 

the inspection of the OFV specified in 

paragraph (f) of this AD. 

New Requirements of This AD 

Actions and Compliance 

(g) Unless already done, do the following 

actions. 

(1) Prior to accomplishing the actions 

specified in paragraph (g)(2) of this AD: 

Install modified or new CPC units, P/N 

GG670–98002–7, in accordance with Part B 

of the Accomplishment Instructions of 

Bombardier Alert Service Bulletin A670BA– 

21–022, dated August 3, 2006. 

(2) Within 4,500 flight hours after the 

effective date of this AD: Install modified or 


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53854 Federal Register / Vol. 75, No. 170 / Thursday, September 2, 2010 / Rules and Regulations 

new CPCPs, P/N GG670–98001–11, in 

accordance with Part C of the 

Accomplishment Instructions of Bombardier 

Alert Service Bulletin A670BA–21–022, 

dated August 3, 2006. Doing the actions 

required by paragraph (g)(2) of this AD 

terminates the requirements of paragraph (f) 

of this AD. 

(h) Installing CPC units, P/N GG670– 

98002–9, in accordance with Bombardier 

Service Bulletin 670BA–21–030, dated 

December 22, 2009, is acceptable for 

compliance with the corresponding 

requirements of paragraph (g)(1) of this AD. 

(i) Actions done before May 29, 2009, in 

accordance with a Liebherr service bulletin 

identified in Table 1 of this AD, are 

acceptable for compliance with the 

corresponding requirements of paragraph 

(g)(1) or (g)(2) of this AD. 

TABLE 1—LIEBHERR SERVICE BULLETINS

Liebherr Service Bulletin— Revision— Dated— 

GG670–98001–21–03 .......................................................................................... Original .................................................. March 21, 2006. 

GG670–98001–21–03 .......................................................................................... 1 ............................................................ November 15, 2007. 

GG670–98002–21–02 .......................................................................................... Original .................................................. April 21, 2006. 

GG670–98002–21–02 .......................................................................................... 1 ............................................................ November 15, 2007. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: The 

MCAI and Bombardier Alert Service Bulletin 

A670BA–21–022, dated August 3, 2006, do 

not describe corrective actions for findings of 

improper OFV manual mode motor and 

altitude limitation functions. This AD 

requires the actions in paragraphs (f)(1) and 

(f)(2) of this AD, which include replacing the 

valve if the OFV manual mode motor or 

altitude limitation functions do not operate 

properly. 

Other FAA AD Provisions 

(j) 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. AMOCs 

approved previously in accordance with AD 

2009–10–10 are approved as AMOCs for the 

corresponding provisions of 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 FAAapproved 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 

(k) Refer to MCAI Canadian Airworthiness 

Directive CF–2009–08R1, dated April 13, 

2010; and the service information identified 

in Table 2 of this AD; for related information. 

TABLE 2—RELATED SERVICE INFORMATION

Bombardier Service information Revision level Date 

Bombardier Alert Service Bulletin A670BA–21–022 ............................................................ Original ................................. August 3, 2006. 

Bombardier Service Bulletin 670BA–21–030 ....................................................................... Original ................................. December 22, 2009. 

Task 21–32–01–000–801 of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B–001, Part 2, Volume 1.28 .......................................... January 20, 2009. 

Task 21–32–01–400–801, of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B–001, Part 2, Volume 1.28 .......................................... January 20, 2009. 

Material Incorporated by Reference 

(l) You must use the applicable service 

information identified in Table 3 of this AD, 

to do the actions required by this AD, unless 

the AD specifies otherwise. If accomplished, 

you must use Bombardier Service Bulletin 

670BA–21–030, dated December 22, 2009, to 

do the optional actions specified by this AD, 

unless the AD specifies otherwise. 

TABLE 3—REQUIRED MATERIAL INCORPORATED BY REFERENCE

Bombardier Service information Revision level Date 

Bombardier Alert Service Bulletin A670BA–21–022 ............................................................ Original ................................. August 3, 2006. 

Task 21–32–01–000–801 of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B–001, Part 2, Volume 1.28 .......................................... January 20, 2009. 

Task 21–32–01–400–801, of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B–001, Part 2, Volume 1.28 .......................................... January 20, 2009. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

Bombardier Service Bulletin 670BA–21–030, 

dated December 22, 2009, under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) The Director of the Federal Register 

previously approved the incorporation by 

reference of the service information 

contained in Table 4 of this AD on May 29, 

2009 (74 FR 22646, May 14, 2009). 


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TABLE 4—MATERIAL PREVIOUSLY INCORPORATED BY REFERENCE

Bombardier Service information Revision level Date 

Bombardier Alert Service Bulletin A670BA–21–022 ............................................................ Original ................................. August 3, 2006. 

Task 21–32–01–000–801 of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B–001, Part 2, Volume 1.28 .......................................... January 20, 2009. 

Task 21–32–01–400–801, of the Bombardier CRJ Regional Jet Series Aircraft Maintenance Manual, CSP B–001, Part 2, Volume 1.28 .......................................... January 20, 2009. 

(3) 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. 

(4) 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. 

(5) 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 August 

13, 2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–21415 Filed 9–1–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0477; Directorate 

Identifier 2009–NM–226–AD; Amendment 

39–16423; AD 2010–18–10] 

RIN 2120–AA64 

Airworthiness Directives; BAE 

Systems (Operations) Limited Model 

BAe 146 and Avro 146–RJ 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: 

Three events have been reported where 

insulation material was found to be fouling 

pulleys in the aileron interconnect circuit in 

the cabin roof area. * * * 

Interference between the cable and the 

insulation bag causes the material to be 

drawn into the gap between the pulley and 

the pulley guard. This condition, if not 

detected and corrected, could lead to 

restricted aileron movement and 

consequently, reduced control of the 

aeroplane. 

* * * * * 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

October 7, 2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of October 7, 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: 

Todd Thompson, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 227–1175; fax (425) 227–1149. 

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 May 19, 2010 (75 FR 27959). 

That NPRM proposed to correct an 

unsafe condition for the specified 

products. The MCAI states: 

Three events have been reported where 

insulation material was found to be fouling 

pulleys in the aileron interconnect circuit in 

the cabin roof area. The insulation material 

is contained in a bag, the material of which 

tends to become brittle with age. During the 

production life of the aeroplane type, several 

methods of bag retention were applied, all of 

which involved puncturing the bag. This 

puncture tends to result in a tear, which, if 

detected in time, can be repaired with tape; 

however, the affected cabin roof area is not 

frequently accessed for inspection. Over 

time, the weight of the bag also tends to 

cause tears in the material, making the 

insulation material sag, thereby causing 

interference with the cable and pulley. 

Interference between the cable and the 

insulation bag causes the material to be 

drawn into the gap between the pulley and 

the pulley guard. This condition, if not 

detected and corrected, could lead to 

restricted aileron movement and 

consequently, reduced control of the 

aeroplane. 

For the reasons described above, this 

[EASA] AD requires the installation of 

additional guards, bolts and nuts on the 

aileron interconnect cable pulleys at frame 29 

(left and right). 

This [EASA] AD has been revised to 

exclude aeroplanes from the Applicability 

that have been modified to freighter 

configuration in accordance with BAE 

Systems modification No. HCM50200B. As 

this modification includes the removal of the 

insulation bags, the unsafe condition that is 

addressed by this [EASA] AD cannot exist or 

develop on those aeroplanes. 

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. 

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 


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