57998 Federal Register / Vol. 77, No. 182 / Wednesday, September 19, 2012 / Rules and Regulations 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0142; Directorate 

Identifier 2010–NM–275–AD; Amendment 

39–17188; AD 2012–18–11] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Bombardier, Inc. Model CL–600–2C10 

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

CL–600–2D15 (Regional Jet Series 705), 

and CL–600–2D24 (Regional Jet Series 

900) airplanes. This AD was prompted 

by reports of failures of a hydraulic 

accumulator’s screw-cap/end cap while 

on the ground that resulted in loss of 

use of that hydraulic system, and in 

high-energy impact damage to adjacent 

systems and structures. This AD 

requires an inspection for part numbers; 

repetitive inspections for any cracking 

of certain hydraulic system 

accumulators, and replacement, if 

necessary; and revising the maintenance 

program to include a life limit for 

certain hydraulic system accumulators. 

We are issuing this AD to prevent loss 

of use of a hydraulic system, which 

could result in reduced controllability 

of the airplane. 

DATES: This AD becomes effective 

October 24, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of October 24, 2012. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at the 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue SE., 

Washington, DC. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7318; fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on March 20, 2012 (77 FR 

16193). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Seven cases of on-ground hydraulic 

accumulator screw cap/end cap failure have 

been experienced on CL–600–2B19 

aeroplanes resulting in loss of the associated 

hydraulic system and high-energy impact 

damage to adjacent systems and structure. 

The lowest number of flight cycles 

accumulated at the time of failure, to date, 

has been 6,991 flight cycles. 

Although there have been no failures to 

date on any CL–600–2C10, CL–600–2D15 or 

CL–600–2D24 aeroplanes, similar 

accumulators to those installed on the CL– 

600–2B19, are installed. The part numbers 

(P/Ns) of the accumulators installed on CL– 

600–2C10, CL–600–2D15 and CL–600–2D24 

aeroplanes are 900096–1 (Hydraulic System 

No. 1 and Hydraulic System No. 2 

accumulators), 900097–1 (Hydraulic System 

No. 3 accumulator) and 08–60204–001 

(Inboard Brake and Outboard Brake 

accumulators). 

A detailed analysis of the calculated line 

of trajectory of a failed screw cap/end cap for 

each of the accumulators has been 

conducted, resulting in the identification of 

several areas where systems and/or structural 

components could potentially be damaged. 

Although all of the failures to date have 

occurred on the ground, an in-flight failure 

affecting such components could potentially 

have an adverse effect on the controllability 

of the aeroplane. 

This [Canadian] directive gives 

instructions to conduct [an inspection to 

determine if certain hydraulic accumulators 

are installed and, if necessary,] repetitive 

ultrasonic inspections [for cracking] of the 

Hydraulic System No. 1, Hydraulic System 

No. 2, Hydraulic System No. 3, Inboard Brake 

and Outboard Brake accumulators, P/Ns 

900096–1, 900097–1, and 08–60204–001, that 

are not identified by the letter ‘‘M’’ or ‘‘T’’ 

after the S/N [serial number] on the 

identification plate. 

* * * * * 

Required actions include revising the 

maintenance program to include a life 

limit for certain accumulators, and for 

airplanes on which cracking is found 

during an ultrasonic inspection, 

replacing the accumulator with a new 

accumulator containing the letter ‘‘M’’ 

or ‘‘T’’, as applicable, after the serial 

number on the identification plate or 

with a new accumulator with a different 

part number, and eventual replacement 

of certain accumulators with new 

accumulators. 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 comments received. 

Request To Reference Most Recent 

Service Information 

Comair Inc. (Comair) requested that 

we reference the most recent service 

information. Comair also stated that the 

revised service information has no effect 

on airplanes on which inspections, 

replacements, or maintenance program 

revisions were accomplished using the 

previous issues that were identified in 

the NPRM (77 FR 16193, March 20, 

2012). 

We agree to reference the most recent 

service information of certain service 

bulletins as identified below. 

• Bombardier Alert Service Bulletin 

A670BA–29–011, Revision B, dated 

December 22, 2010, including Appendix 

A, Revision A, dated July 27, 2010 (for 

hydraulic system No. 1, and hydraulic 

system No. 2 accumulators). 

• Bombardier Alert Service Bulletin 

A670BA–29–012, Revision B, dated 

December 22, 2010, including Appendix 

A, Revision A, dated July 27, 2010 (for 

hydraulic system No. 3 accumulators). 

• Bombardier Alert Service Bulletin 

A670BA–32–021, Revision D, dated 

December 22, 2010, including Appendix 

A, Revision A, dated October 18, 2007 

(for inboard and outboard brake 

accumulators). 

• Bombardier Service Bulletin 

670BA–29–013, Revision B, dated 

December 22, 2010, including Appendix 

A, dated January 29, 2010 (for hydraulic 

system No. 1, and hydraulic system No. 

2 accumulators). 

• Bombardier Service Bulletin 

670BA–32–026, Revision B, dated 

December 22, 2010, including Appendix 

A, dated January 29, 2010 (for inboard 

and outboard brake accumulators). 

• Bombardier Service Bulletin 

670BA–32–028, Revision A, dated 

February 3, 2011 (for inboard brake and 

outboard brake accumulators). 

This revised service information does 

not add more work to the actions 

described in the NPRM (77 FR 16193, 

March 20, 2012). We have revised 

paragraphs (i), (p), (q), and (t) of this AD 

accordingly. 

Request To Include an Alternative 

Method of Compliance (AMOC) for a 

Different Part Number (P/N) 

Tactair Fluid Controls (Tactair) 

requested that we include a hydraulic 

accumulator having P/N 11093–4 as an 

AMOC for replacing hydraulic 

accumulators having P/N 08–60204– 

001. Tactair noted that more than half 


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Federal Register / Vol. 77, No. 182 / Wednesday, September 19, 2012 / Rules and Regulations 57999 

of the airplanes in the Model CL–600– 

2B19 fleet have been retrofitted to P/N 

11093–4. Tactair also indicated that 

allowing use of P/N 11093–4 would be 

more economical for operators. 

We disagree with the commenter’s 

request. Part number 11093–4 has not 

yet been certified for use on Model CL– 

600–2C10 (Regional Jet Series 700, 701, 

& 702), CL–600–2D15 (Regional Jet 

Series 705), or CL–600–2D24 (Regional 

Jet Series 900) airplanes. Approval of 

AMOCs provides alternative methods of 

compliance to the methods required to 

be used in the associated AD. An AMOC 

is issued only after an AD has been 

issued and only after data are provided 

to show that the proposed solution is 

complete and addresses the unsafe 

condition. Once we issue this AD, any 

person may request approval of an 

AMOC under the provisions of 

paragraph (s)(1) of this AD. We have not 

changed this AD in this regard. 

Updated Credit Language 

We have revised the heading and 

wording for paragraph (q) of this AD to 

provide appropriate credit for previous 

accomplishment of certain actions. This 

change does not affect the intent of that 

paragraph. 

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. 

Costs of Compliance 

We estimate that this AD will affect 

389 products of U.S. registry. We also 

estimate that it will take up to 21 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 $8,988 

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 up 

to $4,190,697, or $10,773 per product, 

per inspection cycle. 

In addition, we estimate that any 

necessary follow-on actions would take 

up to 7 work-hours and require parts 

costing $8,988, for a cost of $9,583 per 

product. We have no way of 

determining the number of products 

that may need these actions. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. ‘‘Subtitle VII: 

Aviation Programs,’’ describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in ‘‘Subtitle VII, 

Part A, Subpart III, Section 44701: 

General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this AD will not 

have federalism implications under 

Executive Order 13132. This AD will 

not have a substantial direct effect on 

the States, on the relationship between 

the national government and the States, 

or on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

2. Is not a ‘‘significant rule’’ under the 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); 

3. Will not affect intrastate aviation in 

Alaska; and 

4. Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this AD and placed it in the AD docket. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains the NPRM (77 FR 16193, 

March 20, 2012), the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Operations office (telephone 

(800) 647–5527) is in the ADDRESSES

section. Comments will be available in 

the AD docket shortly after receipt. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of the Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new AD: 

2012–18–11 Bombardier, Inc.: Amendment 

39–17188. Docket No. FAA–2012–0142; 

Directorate Identifier 2010–NM–275–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective October 24, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the airplanes identified 

in paragraphs (c)(1) and (c)(2) of this AD, 

certificated in any category. 

(1) Bombardier, Inc. Model CL–600–2C10 

(Regional Jet Series 700, 701, & 702) 

airplanes, with serial number (S/N) 10003 

through 10314 inclusive. 

(2) Bombardier, Inc. Model CL–600–2D15 

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

(Regional Jet Series 900) airplanes, with S/N 

15001 through 15259 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 29: Hydraulic Power, and 32: 

Landing Gear. 

(e) Reason 

This AD was prompted by reports of 

failures of a hydraulic accumulator’s screwcap/end cap while on the ground that 

resulted in loss of use of that hydraulic 

system, and in high-energy impact damage to 

adjacent systems and structures. We are 

issuing this AD to prevent loss of use of a 

hydraulic system, which could result in 

reduced controllability of the airplane. 

(f) Compliance 

You are responsible for having the actions 

required by this AD performed within the 

compliance times specified, unless the 

actions have already been done. 

(g) Inspection for Part Numbers (P/Ns) 

At the applicable time specified in 

paragraphs (g)(1), (g)(2), and (g)(3) of this AD, 

inspect the hydraulic accumulators in 

hydraulic systems No. 1, No. 2, and No. 3, 

and the inboard and outboard brake systems, 

to determine the part number of the 


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58000 Federal Register / Vol. 77, No. 182 / Wednesday, September 19, 2012 / Rules and Regulations 

accumulator. A review of airplane 

maintenance records is acceptable in lieu of 

this inspection if the part number of the 

accumulator can be conclusively determined 

from that review. 

(1) For an accumulator with more than 

4,500 total flight cycles as of the effective 

date of this AD, inspect that accumulator 

within 500 flight cycles after the effective 

date of this AD. 

(2) For an accumulator with 4,500 or less 

total flight cycles as of the effective date of 

this AD, inspect that accumulator before it 

has accumulated 5,000 total flight cycles. 

(3) If it is not possible to determine the 

total flight cycles accumulated on an 

accumulator, inspect that accumulator within 

500 flight cycles after the effective date of 

this AD. 

(h) Inspection for Letter Designation After 

the Serial Number 

If, during an inspection required by 

paragraph (g) of this AD, an accumulator 

having P/N 900096–1 (for hydraulic systems 

No. 1 and No. 2 accumulators), 900097–1 (for 

hydraulic system No. 3 accumulator), or 08– 

60204–001 (for inboard and outboard brake 

accumulators) is found, at the applicable 

time specified in paragraphs (g)(1), (g)(2), and 

(g)(3) of this AD, do an inspection of the 

identification plate on the hydraulic 

accumulator to determine if an ‘‘M’’ (for 

hydraulic system accumulators) or a ‘‘T’’ (for 

brake system accumulators) follows the serial 

number on the identification plate. A review 

of airplane maintenance records is acceptable 

in lieu of this inspection if the part number 

and the letter of the accumulator can be 

conclusively determined from that review. 

Note 1 to paragraphs (h), (i), (k), (l)(2), and 

(m) of this AD: The letter ‘‘M’’ after the serial 

number on the identification plate is 

applicable to accumulators, P/Ns 900096–1 

and 900097–1, on hydraulic systems No. 1, 

No. 2, and No. 3. The letter ‘‘T’’ after the 

serial number on the identification plate is 

applicable to accumulators, P/N 08–60204– 

001, on the brake system. 

(i) Initial Ultrasonic Inspections of 

Hydraulic System No. 1, Hydraulic System 

No. 2, Hydraulic System No. 3, Inboard 

Brake, and Outboard Brake Accumulators 

If, during any inspection required by 

paragraph (h) of this AD, any accumulator 

without the letter ‘‘M’’ (for hydraulic system 

accumulators) or a ‘‘T’’ (for brake system 

accumulators) after the serial number is 

found, at the applicable time specified in 

paragraph (g)(1), (g)(2), or (g)(3) of this AD: 

Do an ultrasonic inspection of the inner 

shoulders of the accumulator screw-cap for 

cracking, in accordance with Part B of the 

Accomplishment Instructions of the 

applicable Bombardier service bulletin 

identified in paragraphs (i)(1), (i)(2), and 

(i)(3) of this AD, and at the internal threads 

of the screw-caps, in accordance with the 

Accomplishment Instructions of the 

applicable Bombardier service bulletin 

identified in paragraphs (i)(4), (i)(5), and 

(i)(6) of this AD. 

(1) For hydraulic system No. 1, and 

hydraulic system No. 2 accumulators: 

Bombardier Alert Service Bulletin A670BA– 

29–011, Revision B, dated December 22, 

2010, including Appendix A, Revision A, 

dated July 27, 2010. 

(2) For hydraulic system No. 3 

accumulators: Bombardier Alert Service 

Bulletin A670BA–29–012, Revision B, dated 

December 22, 2010, including Appendix A, 

Revision A, dated July 27, 2010. 

(3) For inboard brake and outboard brake 

accumulators: Bombardier Alert Service 

Bulletin A670BA–32–021, Revision D, dated 

December 22, 2010, including Appendix A, 

Revision A, dated October 18, 2007. 

(4) For hydraulic system No. 1 

accumulators: Bombardier Service Bulletin 

670BA–29–013, Revision B, dated December 

22, 2010, including Appendix A, dated 

January 29, 2010. 

(5) For hydraulic system No. 2 

accumulators: Bombardier Service Bulletin 

670BA–29–013, Revision B, dated December 

22, 2010, including Appendix A, dated 

January 29, 2010. 

(6) For inboard brake and outboard brake 

accumulators: Bombardier Service Bulletin 

670BA–32–026, Revision B, dated December 

22, 2010, including Appendix A, dated 

January 29, 2010. 

(j) No Cracking Found During 

Accomplishment of the Actions Required by 

Paragraph (i) of This AD 

If no cracking is found during the 

inspections required by paragraph (i) of this 

AD, do the actions required by paragraph (l) 

of this AD. 

(k) Cracking Found During Accomplishment 

of the Actions Required by Paragraph (i) of 

This AD 

If any cracking is found during the 

inspections required by paragraph (i) of this 

AD, before further flight, replace the 

accumulator with a new accumulator 

containing the letter ‘‘M’’ or ‘‘T’’, as 

applicable, after the serial number on the 

identification plate, in accordance with the 

Accomplishment Instructions of the 

applicable service bulletin identified in 

paragraphs (i)(1) through (i)(6) of this AD, or 

replace the accumulator with a new 

accumulator as specified in paragraphs (k)(1) 

through (k)(3) of this AD, as applicable. 

(1) For any cracked hydraulic system No. 

1 or No. 2 accumulator, replace the cracked 

accumulator with a new accumulator, P/N 

900121–1, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 670BA–29–014, dated 

December 22, 2010. 

(2) For any cracked hydraulic system No. 

3 accumulator, replace the cracked 

accumulator with a new accumulator, P/N 

900122–1, in accordance with paragraph (o) 

of this AD. 

(3) For any cracked inboard brake or 

outboard brake accumulator, replace the 

cracked accumulator with a new 

accumulator, P/N 90006691, in accordance 

with paragraph (p) of this AD. 

(l) Repetitive Ultrasonic Inspections of 

Hydraulic System No. 1, Hydraulic System 

No. 2, Hydraulic System No. 3, Inboard 

Brake, and Outboard Brake Accumulators 

For each accumulator on which no 

cracking was found during any inspection 

required by paragraph (i) of this AD, within 

500 flight cycles after the previous ultrasonic 

inspection, inspect the accumulator in 

accordance with paragraph (i) of this AD. 

(1) If no cracking is found, do the actions 

required by paragraph (l) of this AD and 

repeat thereafter at intervals not to exceed 

500 flight cycles. 

(2) If any cracking is found, before further 

flight, replace the accumulator with a new 

accumulator containing the letter ‘‘M’’ or 

‘‘T,’’ as applicable, after the serial number on 

the identification plate, in accordance with 

the Accomplishment Instructions of the 

applicable service bulletin identified in 

paragraphs (i)(1) through (i)(6) of this AD, or 

replace the accumulator with a new 

accumulator as specified in paragraphs (k)(1), 

(k)(2), and (k)(3) of this AD, as applicable. 

(m) Replacement of Hydraulic System No. 1 

and No. 2 Accumulators 

For airplanes on which a hydraulic system 

No. 1 or No. 2 accumulator having P/N 

900096–1 without the letter ‘‘M’’ after the 

serial number is installed: At the applicable 

time specified in paragraphs (m)(1) and 

(m)(2) of this AD, replace the accumulator 

with a new accumulator having P/N 900096– 

1 with the letter ‘‘M’’ after the serial number; 

or having P/N 900121–1, in accordance with 

the Accomplishment Instructions of 

Bombardier Service Bulletin 670BA–29–014, 

dated December 22, 2010. 

(1) For an accumulator with more than 

19,500 total flight cycles as of the effective 

date of this AD, replace that accumulator 

within 500 flight cycles after accomplishing 

the most recent inspection required by 

paragraph (i) or (l) of this AD. 

(2) For an accumulator with 19,500 or less 

total flight cycles as of the effective date of 

this AD, replace that accumulator before it 

has accumulated 20,000 total flight cycles. 

(3) If it is not possible to determine the 

total flight cycles accumulated on an 

accumulator, replace that accumulator within 

500 flight cycles after accomplishing the 

most recent ultrasonic inspection required by 

paragraph (i) or (l) of this AD. 

(n) Hydraulic System Safe Life Limit 

Introduction 

Within 60 days after the effective date of 

this AD, revise the maintenance program to 

include a safe life limit for the hydraulic 

system No. 1 and No. 2 accumulators, P/N 

900096–1, by incorporating Tasks 29–11–11– 

000–801 and 29–11–11–400–801 of Section 

1.3—Safe Life Components, of Part 2, 

Airworthiness Limitations, Revision 11, 

dated October 20, 2010, of the Bombardier 

CL–600–2C10, CL–600–2D15, CL–600–2D24, 

CL–600–2E25 Maintenance Requirements 

Manual, CSP B–053. 

(o) Replacement of Hydraulic System No. 3 

Accumulator 

Within 4,000 flight cycles or 24 months 

after the effective date of this AD, whichever 

occurs first, replace any hydraulic system No. 

3 accumulator having P/N 900097–1 with a 

new accumulator having P/N 900122–1, in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

670BA–29–015, dated December 22, 2010. 


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(p) Replacement of Inboard or Outboard 

Brake System Accumulators 

Within 4,000 flight cycles or 24 months 

after the effective date of this AD, whichever 

occurs first, replace any inboard or outboard 

brake system accumulator having P/N 08– 

60204–001 with a new accumulator having 

P/N 90006691, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 670BA–32–028, Revision A, 

dated February 3, 2011. 

(q) Credit for Previous Actions 

(1) This paragraph provides credit for the 

actions required by paragraph (i) of this AD, 

if those actions were performed before the 

effective date of this AD using Part B of the 

Accomplishment Instructions of the 

Bombardier service bulletin identified in 

paragraph (q)(1)(i), (q)(1)(ii), (q)(1)(iii), 

(q)(1)(iv), (q)(1)(v), (q)(1)(vi), (q)(1)(vii), or 

(q)(1)(viii) of this AD. 

(i) Bombardier Alert Service Bulletin 

A670BA–29–011, dated October 18, 2007. 

(ii) Bombardier Alert Service Bulletin 

A670BA–29–011, Revision A, dated July 27, 

2010. 

(iii) Bombardier Alert Service Bulletin 

A670BA–29–012, dated March 13, 2008. 

(iv) Bombardier Alert Service Bulletin 

A670BA–29–012, Revision A, dated July 27, 

2010. 

(v) Bombardier Alert Service Bulletin 

A670BA–32–021, dated November 21, 2006. 

(vi) Bombardier Alert Service Bulletin 

A670BA–32–021, Revision A, dated March 7, 

2007. 

(vii) Bombardier Alert Service Bulletin 

A670BA–32–021, Revision B, dated October 

18, 2007. 

(viii) Bombardier Service Bulletin 

A670BA–32–021, Revision C, dated July 27, 

2010. 

(2) This paragraph provides credit for the 

actions required by paragraphs (i) and (p) of 

this AD, if those actions were performed 

before the effective date of this AD using the 

Accomplishment Instructions of the 

Bombardier service bulletin identified in 

paragraph (q)(2)(i), (q)(2)(ii), (q)(2)(iii), 

(q)(2)(iv), or (q)(2)(v) of this AD. 

(i) Bombardier Service Bulletin 670BA–29– 

013, dated January 29, 2010. 

(ii) Bombardier Service Bulletin 670BA– 

29–013, Revision A, dated July 27, 2010. 

(iii) Bombardier Service Bulletin 670BA– 

32–026, dated January 29, 2010. 

(iv) Bombardier Service Bulletin 670BA– 

32–026, Revision A, dated July 27, 2010. 

(v) Bombardier Service Bulletin 670BA– 

32–028, dated December 22, 2010. 

(r) Terminating Actions 

Accomplishing the actions required by 

paragraphs (m), (n), (o), and (p) of this AD 

terminates the requirements of this AD for 

the accumulator at that location only. 

(s) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (ACO), ANE–170, FAA, 

has the authority to approve AMOCs for this 

AD, if requested using the procedures found 

in 14 CFR 39.19. In accordance with 14 CFR 

39.19, send your request to your principal 

inspector or local Flight Standards District 

Office, as appropriate. If sending information 

directly to the manager of the ACO, send it 

to ATTN: Program Manager, Continuing 

Operational Safety, FAA, New York ACO, 

1600 Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone 516–228–7300; 

fax 516–794–5531. Before using any 

approved AMOC, notify your appropriate 

principal inspector, or lacking a principal 

inspector, the manager of the local flight 

standards district office/certificate holding 

district office. The AMOC approval letter 

must specifically reference this AD. 

(2) Airworthy Product: For any requirement 

in this AD to obtain corrective actions from 

a manufacturer or other source, use these 

actions if they are FAA-approved. Corrective 

actions are considered FAA-approved if they 

are approved by the State of Design Authority 

(or their delegated agent). You are required 

to assure the product is airworthy before it 

is returned to service. 

(t) Related Information 

Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

Airworthiness Directive CF–2010–35R1, 

dated June 28, 2011, and the service 

information identified in paragraphs (t)(1) 

through (t)(9) of this AD, for related 

information. 

(1) Bombardier Alert Service Bulletin 

A670BA–29–011, Revision B, dated 

December 22, 2010, including Appendix A, 

Revision A, dated July 27, 2010. 

(2) Bombardier Alert Service Bulletin 

A670BA–29–012, Revision B, dated 

December 22, 2010, including Appendix A, 

Revision A, dated July 27, 2010. 

(3) Bombardier Alert Service Bulletin 

A670BA–32–021, Revision D, dated 

December 22, 2010, including Appendix A, 

Revision A, dated October 18, 2007. 

(4) Bombardier Service Bulletin 670BA– 

29–013, Revision B, dated December 22, 

2010, including Appendix A, dated January 

29, 2010. 

(5) Bombardier Service Bulletin 670BA– 

32–026, Revision B, dated December 22, 

2010, including Appendix A, dated January 

29, 2010. 

(6) Bombardier Service Bulletin 670BA– 

29–014, dated December 22, 2010. 

(7) Bombardier Service Bulletin 670BA– 

29–015, dated December 22, 2010. 

(8) Bombardier Service Bulletin 670BA– 

32–028, Revision A, dated February 3, 2011. 

(9) Tasks 29–11–11–000–801 and 29–11– 

11–400–801 of Section 1.3—Safe Life 

Components, of Part 2, Airworthiness 

Limitations, Revision 11, dated October 20, 

2010, of the Bombardier CL–600–2C10, CL– 

600–2D15, CL–600–2D24, CL–600–2E25 

Maintenance Requirements Manual, CSP B– 

053. 

(u) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the following service information 

under 5 U.S.C. 552(a) and 1 CFR part 51. 

(2) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. 

(i) Bombardier Alert Service Bulletin 

A670BA–29–011, Revision B, dated 

December 22, 2010, including Appendix A, 

Revision A, dated July 27, 2010. 

(ii) Bombardier Alert Service Bulletin 

A670BA–29–012, Revision B, dated 

December 22, 2010, including Appendix A, 

Revision A, dated July 27, 2010. 

(iii) Bombardier Alert Service Bulletin 

A670BA–32–021, Revision D, dated 

December 22, 2010, including Appendix A, 

Revision A, dated October 18, 2007. 

(iv) Bombardier Service Bulletin 670BA– 

29–013, Revision B, dated December 22, 

2010, including Appendix A, dated January 

29, 2010. 

(v) Bombardier Service Bulletin 670BA– 

32–026, Revision B, dated December 22, 

2010, including Appendix A, dated January 

29, 2010. 

(vi) Bombardier Service Bulletin 670BA– 

29–014, dated December 22, 2010. 

(vii) Bombardier Service Bulletin 670BA– 

29–015, dated December 22, 2010. 

(viii) Bombardier Service Bulletin 670BA– 

32–028, Revision A, dated February 3, 2011. 

(ix) Tasks 29–11–11–000–801 and 29–11– 

11–400–801 of Section 1.3—Safe Life 

Components, of Part 2, Airworthiness 

Limitations, Revision 11, dated October 20, 

2010, of the Bombardier CL–600–2C10, CL– 

600–2D15, CL–600–2D24, CL–600–2E25 

Maintenance Requirements Manual, CSP B– 

053. 

(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; email 

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, 

WA. 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 an NARA facility, call 202–741– 

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

federal_register/code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on August 

31, 2012. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–22042 Filed 9–18–12; 8:45 am] 

BILLING CODE 4910–13–P 


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