## 8557 Federal Register / Vol. 75, No. 37 / Thursday, February 25, 2010 / Proposed Rules

AD, prior to further flight, repair in accordance with Section 53–30–03 of the Boeing 747 Structural Repair Manual (SRM); or Boeing Alert Service Bulletin 747– 53A2267, Revision 4, dated March 26, 2009; except as required by paragraph (j) of this AD; and repeat the inspection required by paragraph (g) of this AD at the times specified in paragraph (i)(1) of this AD. After the effective date of this AD, use only Boeing Alert Service Bulletin 747–53A2267, Revision 4, dated March 26, 2009.

(1) As of the effective date of this AD: If the repair specified in the Boeing 747 SRM does not include removing the lap joint and the upper row of countersunk fasteners, repeat the inspection required by paragraph (g) of this AD at the earlier of the times specified in paragraphs (i)(1)(i) and (i)(1)(ii) of this AD, and thereafter at intervals not to exceed 1,000 flight cycles.

(i) Within 3,000 flight cycles after the last inspection required by paragraph (g) of this AD.

(ii) Within 1,000 flight cycles after the last inspection required by paragraph (g) of this AD, or within 500 flight cycles after the effective date of this AD, whichever occurs later.

(2) If the repair specified in the 747 SRM includes removing the lap joint and the upper row of countersunk fasteners, such repair constitutes terminating action for the inspection requirements of this AD.
Exception to the Service Bulletin

(j) If any cracking is found during any inspection required by this AD, and Boeing Alert Service Bulletin 747–53A2267, Revision 4, dated March 26, 2009, specifies contacting Boeing for appropriate action: Before further flight, repair the cracking using a method approved in accordance with the procedures specified in paragraph (k) of this AD. For a repair method to be approved by the Manager, Seattle ACO, as required by this paragraph, the Manager’s approval letter must specifically refer to this AD.
Alternative Methods of Compliance (AMOCs)

(k)(1) The Manager, Seattle Aircraft Certification Office, 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: Ivan Li, Aerospace Engineer, Airframe Branch, ANM– 120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057–3356; telephone (425) 917–6437; fax (425) 917–6590. Or, e-mail information to 9-ANM-Seattle-ACO-AMOCRequests@faa.gov.

(2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. 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.

(3) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD if it is approved by the Boeing Commercial Airplanes Organization Designation Authorization (ODA) that has been authorized by the Manager, Seattle ACO, to make those findings. For a repair method to be approved, the repair must meet the certification basis of the airplane, and the approval must specifically refer to this AD.

(4) AMOCs approved previously in accordance with AD 94–17–01 are approved as AMOCs for the corresponding provisions of this AD.

Issued in Renton, Washington, on February 17, 2010. Stephen P. Boyd, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 2010–3819 Filed 2–24–10; 8:45 am]

**BILLING CODE 4910–13–P**



### DEPARTMENT OF TRANSPORTATION

**Federal Aviation Administration**

**14 CFR Part 39**

**[Docket No. FAA–2010–0170; Directorate Identifier 2009–NM–127–AD]** 

**RIN 2120–AA64**



### Airworthiness Directives; Empresa **Brasileira de Aeronautica S.A. (EMBRAER) Model EMB–135ER,**  **–135KE, –135KL, and –135LR Airplanes; and EMBRAER Model EMB–**  **145, –145ER, –145MR, –145LR, –145XR, –145MP, and –145EP**  **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:

Reassessment of the damage tolerance analysis resulted in threshold reduction for some Structure Significant Items (SSI) of the Maintenance Review Board Report (MRBR) Airworthiness Limitations Items (ALI). Failure to inspect these structural components, according to the new threshold, could prevent a timely detection of fatigue cracking. These cracks, if not properly addressed, could adversely affect the structural integrity 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 April 12, 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 Empresa Brasileira de Aeronautica S.A. (EMBRAER), Technical Publications Section (PC 060), Av. Brigadeiro Faria Lima, 2170—Putim—12227–901 Sa  ̃ o Jose dos Campos—SP—BRASIL; telephone: +55 12 3927–5852 or +55 12 3309–0732; fax: +55 12 3927–7546; e-mail: distrib@embraer.com.br; Internet: http://www.flyembraer.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 or 425–227–1152. 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** 

### : 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** 

### :
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


## 8558 Federal Register / Vol. 75, No. 37 / Thursday, February 25, 2010 / Proposed Rules

**ADDRESSES** 

### section. Include ‘‘Docket No. FAA–2010–0170; Directorate Identifier 2009–NM–127–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 Agencia Nacional De Aviacao Civil—Brazil (ANAC), which is the airworthiness authority for Brazil, has issued Brazilian Airworthiness Directive 2009–05–02, effective June 1, 2009 (referred to after this as ‘‘the MCAI ’’ ), to correct an unsafe condition for the specified products. The MCAI states:

Reassessment of the damage tolerance analysis resulted in threshold reduction for some Structure Significant Items (SSI) of the Maintenance Review Board Report (MRBR) Airworthiness Limitations Items (ALI). Failure to inspect these structural components, according to the new threshold, could prevent a timely detection of fatigue cracking. These cracks, if not properly addressed, could adversely affect the structural integrity of the airplane.


### * * * * *

You may obtain further information by examining the MCAI in the AD docket.

Relevant Service Information

Embraer has issued Temporary Revision 12–1, dated November 27, 2008, to the EMBRAER EMB135/ EMB145 Maintenance Review Board Report MRB–145/1150, Revision 12, dated September 19, 2008. 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 711 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 $60,435, 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:
Empresa Brasileira de Aeronautica S.A. (EMBRAER): Docket No. FAA–2010– 0170; Directorate Identifier 2009–NM– 127–AD.

Comments Due Date

(a) We must receive comments by April 12,
2010.

Affected ADs

(b) None.
Applicability

(c) This AD applies to all Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB–135ER, –135KE, –135KL, and –135LR airplanes; EMBRAER Model EMB– 145, –145ER, –145MR, –145LR, –145XR, –145MP, and –145EP airplanes; certificated in any category.


## 8559 Federal Register / Vol. 75, No. 37 / Thursday, February 25, 2010 / Proposed Rules

Subject

(d) Air Transport Association (ATA) of America Code 57: Wings.

Reason

(e) The mandatory continuing airworthiness information (MCAI) states:

Reassessment of the damage tolerance analysis resulted in threshold reduction for some Structure Significant Items (SSI) of the Maintenance Review Board Report (MRBR) Airworthiness Limitations Items (ALI). Failure to inspect these structural components, according to the new threshold, could prevent a timely detection of fatigue cracking. These cracks, if not properly addressed, could adversely affect the structural integrity of the airplane.


### * * * * *
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 90 days after the effective date of this AD, do the following actions, as applicable.

(1) For EMBRAER Model EMB–135ER, –135KE, –135KL, and –135LR airplanes, and Model EMB–145, –145EP, –145ER, –145LR, –145MP, and –145MR airplanes: Revise the Airworthiness Limitations (ALS) of the Instructions for Continued Airworthiness (ICA) to incorporate Tasks 54–50–00–230– 802–A00 and 54–50–00–220–808–A01 specified in Appendix 2, Airworthiness Limitation Requirements, of EMBRAER EMB135/EMB145 Maintenance Review Board Report MRB–145/1150, Revision 12, dated September 19, 2008 (the ‘‘ MRBR’’ ). The initial compliance times for the tasks start from the applicable threshold specified in Appendix 2 of the MRBR, or within 500 flight cycles after the effective date of this AD, whichever occurs later.

(2) For EMBRAER Model EMB–145EP, –145ER, –145LR, –145MR, and –145MP airplanes: Revise the ALS of the ICA to incorporate Tasks 57–26–00–250–815–A00, 57–26–00–250–815–A01, 57–26–00–250– 813–A00, and 57–26–00–250–813–A02, specified in Appendix 2, Airworthiness Limitation Requirements, of EMBRAER EMB135/EMB145 Maintenance Review Board Report MRB–145/1150, Revision 12, dated September 19, 2008 ( ‘‘the MRBR’’ ). The initial compliance times for the tasks start from the later of the times specified in paragraph (g)(2)(i) or (g)(2)(ii) of this AD.

(i) At the later of the applicable thresholds specified in Appendix 2 of the MRBR or within 500 flight cycles after the effective date of this AD, whichever occurs later.

(ii) At the applicable time specified in Section A2.3.2.3.1, ‘‘ Fatigue Threshold Reduced, ’’ of Appendix 2, Airworthiness Limitation Requirements, of the MRBR.

(3) For all airplanes: Revise the ALS of the ICA to incorporate Tasks 57–10–00–250– 801–A00 and 57–10–00–250–801–A01 specified in EMBRAER Temporary Revision 12–1, dated November 27, 2008, to the EMBRAER EMB135/EMB145 Maintenance Review Board Report MRB–145/1150, Revision 12, dated September 19, 2008. The initial compliance times for the tasks start at the times specified in paragraphs (g)(3)(i) and (g)(3)(ii) of this AD, as applicable.

(i) For Task 57–10–00–250–801–A00: Prior to the accumulation of 23,600 total flight cycles, or within 500 flight cycles after the effective date of this AD, whichever occurs later.

(ii) For Task 57–10–00–250–801–A01: Within 24,000 flight cycles after accomplishing EMBRAER Service Bulletin 145–57–0047, dated October 18, 2008, or within 500 flight cycles after the effective date of this AD, whichever occurs later.

(h) After accomplishing the actions specified in paragraph (g) of this AD, no alternative inspections, inspection intervals, or airworthiness limitations may be used unless the inspections, inspection intervals, or airworthiness limitations are approved as alternative method of compliance in accordance with the procedures specified in paragraph (i) of this AD.

FAA AD Differences

Note 1: This AD differs from the MCAI and/or service information as follows: No differences.

Other FAA AD Provisions

(i) The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM–116, Transport Airplane Directorate 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: 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. 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

(j) Refer to MCAI Brazilian Airworthiness Directive 2009–05–02, effective June 1, 2009; EMBRAER Temporary Revision 12–1, dated November 27, 2008, to the EMBRAER EMB135/EMB145 Maintenance Review Board Report MRB–145/1150, Revision 12, dated September 19, 2008; and Tasks 54–50– 00–230–802–A00 and 54–50–00–220–808– A01 specified in Appendix 2, Airworthiness Limitation Requirements, of EMBRAER EMB135/EMB145 Maintenance Review Board Report MRB–145/1150, Revision 12, dated September 19, 2008; for related information.

Issued in Renton, Washington, on February 17, 2010. Stephen P. Boyd, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 2010–3826 Filed 2–24–10; 8:45 am]

**BILLING CODE 4910–13–P**



### DEPARTMENT OF TRANSPORTATION

**Federal Aviation Administration**

**14 CFR Part 39**

**[Docket No. FAA–2010–0169; Directorate Identifier 2009–NM–102–AD]** 

**RIN 2120–AA64**



### Airworthiness Directives; Bombardier, **Inc. Model CL–600–1A11 (CL–600), CL– 600–2A12 (CL–601), and CL–600–2B16**  **(CL–601–3A, CL–601–3R, and CL–604 Variants) 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 that would supersede an existing AD. 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:

A specific batch of nose landing gear (NLG) and NLG door selector valves, part number (P/N) 601R75146–1 (Kaiser Fluid Technologies P/N 750006000), may have had their end caps incorrectly lock-wired and/or incorrectly torqued during assembly. This condition can lead to the end cap backing off, with consequent damage to a seal and internal leakage within the valve.

Subsequently, if electrical power is transferred or removed from the aircraft before the NLG safety pin is installed, any pressure, including residual pressure, in the No. 3 hydraulic system can result in an uncommanded NLG retraction.



### The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.