Federal Register / Vol. 75, No. 219 / Monday, November 15, 2010 / Proposed Rules 69609 

Send information to ATTN: Tom Rodriguez, 

Aerospace Engineer, International Branch, 

ANM–116, Transport Airplane Directorate, 

FAA, 1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone (425) 

227–1137; fax (425) 227–1149. 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 

(k) Refer to MCAI European Aviation 

Safety Agency Airworthiness Directive 2009– 

0268, dated December 17, 2009; Fokker 

Service Bulletin SBF100–32–157, Revision 1, 

dated October 7, 2009; and Goodrich Service 

Bulletin 41350–32–25, dated January 30, 

2009; for related information. 

Issued in Renton, Washington, on 

November 3, 2010. 

Dionne Palermo, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–28606 Filed 11–12–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–1113; Directorate 

Identifier 2010–NM–121–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model CL–600–2B19 (Regional Jet 

Series 100 & 440) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

originated by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

During flight-testing of a wing anti-ice 

piccolo tube containing a deliberate small 

breach, it was determined that the wing 

leading edge thermal switches Part Number 

(P/N) 601R59320–1 were not detecting the 

consequent bleed leak at the design 

threshold. As a result, Airworthiness 

Limitation (AWL) tasks, consisting of a 

functional check of the wing leading edge 

thermal switches (P/N 601R59320–1) and an 

inspection of the wing anti-ice duct piccolo 

tubes on aeroplanes with these switches 

installed, have been introduced. These tasks 

will limit exposure to dormant failure of the 

wing leading edge thermal switches in the 

event of piccolo tube failure, which could 

potentially compromise the structural 

integrity of the wing leading edge and the 

effectiveness of the wing anti-ice system. 

* * * * * 

The unsafe condition is loss of control 

of the airplane. The proposed AD would 

require actions that are intended to 

address the unsafe condition described 

in the MCAI. 

DATES: We must receive comments on 

this proposed AD by December 30, 

2010. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: (202) 493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue, SE., Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–40, 1200 New Jersey 

Avenue, SE., Washington, DC, between 

9 a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. 

For service information identified in 

this proposed AD, contact Bombardier, 

Inc., 400 Coˆte-Vertu Road West, Dorval, 

Que ́bec H4S 1Y9, Canada; telephone 

514–855–5000; fax 514–855–7401; 

e-mail; thd.crj@aero.bombardier.com; 

Internet http://www.bombardier.com. 

You may review copies of the 

referenced service information at the 

FAA, Transport Airplane Directorate, 

1601 Lind Avenue, SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, 

call 425–227–1221. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (telephone (800) 647–5527) is in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office (ACO), 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7318; fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–1113; Directorate Identifier 

2010–NM–121–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We have lengthened the 30-day 

comment period for proposed ADs that 

address MCAI originated by aviation 

authorities of other countries to provide 

adequate time for interested parties to 

submit comments. The comment period 

for these proposed ADs is now typically 

45 days, which is consistent with the 

comment period for domestic transport 

ADs. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

The Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2010–12, 

dated May 26, 2010 (referred to after 

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

condition for the specified products. 

The MCAI states: 

During flight-testing of a wing anti-ice 

piccolo tube containing a deliberate small 

breach, it was determined that the wing 

leading edge thermal switches Part Number 


hsrobinson on DSK69SOYB1PROD with PROPOSALS
69610 Federal Register / Vol. 75, No. 219 / Monday, November 15, 2010 / Proposed Rules 

(P/N) 601R59320–1 were not detecting the 

consequent bleed leak at the design 

threshold. As a result, Airworthiness 

Limitation (AWL) tasks, consisting of a 

functional check of the wing leading edge 

thermal switches (P/N 601R59320–1) and an 

inspection of the wing anti-ice duct piccolo 

tubes on aeroplanes with these switches 

installed, have been introduced. These tasks 

will limit exposure to dormant failure of the 

wing leading edge thermal switches in the 

event of piccolo tube failure, which could 

potentially compromise the structural 

integrity of the wing leading edge and the 

effectiveness of the wing anti-ice system. 

This directive mandates revision of the 

approved maintenance schedule to include 

the above referenced tasks, including phasein schedules that supersede the phase-in 

schedules specified in the AWL tasks. 

Note: Thermal switches, P/N 601R59320– 

1, were installed in production on aircraft 

Serial Numbers (S/N) 7213 and subsequent. 

Service Bulletin 601R–30–022 covered inservice installation of these switches on 

aircraft S/Ns 7003 through 7212. 

The unsafe condition is loss of control 

of the airplane. You may obtain further 

information by examining the MCAI in 

the AD docket. 

Relevant Service Information 

Bombardier has issued Temporary 

Revisions (TR) 2A–49 and TR 2A–50, 

both dated November 17, 2009, to 

Appendix A, ‘‘Certification Maintenance 

Requirements,’’ of Part 2, ‘‘Airworthiness 

Limitations,’’ of the Bombardier CL– 

600–2B19 Maintenance Requirements 

Manual. The actions described in this 

service information are intended to 

correct the unsafe condition identified 

in the MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to our 

bilateral agreement with the State of 

Design Authority, we have been notified 

of the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all pertinent 

information and determined an unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 

general, agree with their substance. But 

we might have found it necessary to use 

different words from those in the MCAI 

to ensure the AD is clear for U.S. 

operators and is enforceable. In making 

these changes, we do not intend to differ 

substantively from the information 

provided in the MCAI and related 

service information. 

We might also have proposed 

different actions in this AD from those 

in the MCAI in order to follow FAA 

policies. Any such differences are 

highlighted in a NOTE within the 

proposed AD. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 628 products of U.S. 

registry. We also estimate that it would 

take about 1 work-hour per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $85 per work-hour. Based on 

these figures, we estimate the cost of the 

proposed AD on U.S. operators to be 

$53,380, or $85 per product. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. ‘‘Subtitle VII: 

Aviation Programs,’’ describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in ‘‘Subtitle VII, 

Part A, Subpart III, Section 44701: 

General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

1. Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866; 

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

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

3. Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD and placed it in the 

AD docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

2. The FAA amends § 39.13 by adding 

the following new AD: 

Bombardier, Inc.: Docket No. FAA–2010– 

1113; Directorate Identifier 2010–NM– 

121–AD. 

Comments Due Date 

(a) We must receive comments by 

December 30, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

Model CL–600–2B19 (Regional Jet Series 100 

& 440) airplanes; certificated in any category; 

serial numbers 7003 and subsequent. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 57: Wings. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

During flight-testing of a wing anti-ice 

piccolo tube containing a deliberate small 

breach, it was determined that the wing 

leading edge thermal switches Part Number 

(P/N) 601R59320–1 were not detecting the 

consequent bleed leak at the design 

threshold. As a result, Airworthiness 

Limitation (AWL) tasks, consisting of a 

functional check of the wing leading edge 

thermal switches (P/N 601R59320–1) and an 

inspection of the wing anti-ice duct piccolo 

tubes on aeroplanes with these switches 

installed, have been introduced. These tasks 

will limit exposure to dormant failure of the 

wing leading edge thermal switches in the 

event of piccolo tube failure, which could 

potentially compromise the structural 

integrity of the wing leading edge and the 

effectiveness of the wing anti-ice system. 

* * * * * 

The unsafe condition is loss of control of 

the airplane. 


hsrobinson on DSK69SOYB1PROD with PROPOSALS
Federal Register / Vol. 75, No. 219 / Monday, November 15, 2010 / Proposed Rules 69611 

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) Within 30 days after the effective date 

of this AD, revise the Airworthiness 

Limitations section (ALS) of the Instructions 

for Continued Airworthiness (ICA) by 

incorporating Task Number C36–20–133–03 

specified in Bombardier Temporary Revision 

(TR) 2A–50, dated November 17, 2009; and 

Task Number C30–10–133–01 specified in 

Bombardier TR 2A–49, dated November 17, 

2009; into Appendix A, ‘‘Certification 

Maintenance Requirements,’’ of Part 2 of the 

Bombardier CL–600–2B19 Maintenance 

Requirements Manual (MRM). For these 

tasks, the initial compliance time starts at the 

applicable time specified in paragraphs (g)(1) 

and (g)(2) of this AD. Thereafter, except as 

provided by paragraph (h) of this AD, no 

alternative functional check of the thermal 

switch or detailed visual inspection of the 

piccolo tube may be approved. 

Note 1: The actions required by paragraph 

(g) of this AD may be done by inserting a 

copy of Bombardier TR 2A–49 and TR 2A– 

50, both dated November 17, 2009, into the 

Appendix A of Part 2 of the Bombardier CL– 

600–2B19 MRM. When these TRs have been 

included in Appendix A of Part 2 of the 

general revisions of the MRM, the general 

revisions may be inserted in the MRM, 

provided that the relevant information in the 

general revision is identical to that in 

Bombardier TR 2A–49 and TR 2A–50, both 

dated November 17, 2009. 

(1) For Task Number C36–20–133–03, the 

initial compliance time is before the 

accumulation of 15,000 total flight hours or 

within 7 months after the effective date of 

this AD, whichever occurs later. 

(2) For Task Number C30–10–133–01, the 

initial compliance time is before the 

accumulation of 15,000 total flight hours on 

the piccolo tube or within 7 months after the 

effective date of this AD, whichever occurs 

later. 

FAA AD Differences 

Note 2: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(h) 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 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 

(i) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–12, dated May 26, 2010; 

and Bombardier TR 2A–49, dated November 

17, 2009, and Bombardier TR 2A–50, dated 

November 17, 2009 to Appendix A, 

‘‘Certification Maintenance Requirements,’’ of 

Part 2 of the Bombardier CL–600–2B19 MRM; 

for related information. 

Issued in Renton, Washington, on 

November 3, 2010. 

Dionne Palermo, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–28604 Filed 11–12–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0960; Directorate 

Identifier 98–ANE–09–AD] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

plc RB211–Trent 768, 772, and 772B 

Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM); rescission. 

SUMMARY: We propose to rescind an 

airworthiness directive (AD) for the 

products listed above. The existing AD, 

AD 98–09–27, resulted from aircraft 

certification testing which revealed that 

stresses on the thrust reverser hinge 

were higher than had been anticipated 

during engine certification, and the 

United Kingdom Civil Aviation 

Authority, issuing AD 008–03–97. 

Since we issued AD 98–09–27, we 

discovered that its requirements were 

duplicated in airplane-level AD 2001– 

09–14, issued by the FAA Transport 

Airplane Directorate. This proposal to 

rescind the engine-level AD allows the 

public the opportunity to comment on 

the FAA’s determination of the 

duplication of requirements in another 

AD, before we rescind the engine-level 

AD. 

DATES: We must receive comments on 

this proposed AD by December 30, 

2010. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov, and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue, SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. 

• Fax: (202) 493–2251. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (phone (800) 647–5527) is the 

same as the Mail address provided in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Alan Strom, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: alan.strom@faa.gov; telephone 

(781) 238–7143; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD rescission. Send your 

comments to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–0960; Directorate Identifier 

98–ANE–09–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD rescission. 

We will consider all comments received 

by the closing date and may amend this 

proposed AD rescission based on those 

comments. 


hsrobinson on DSK69SOYB1PROD with PROPOSALS