### 7513 Federal Register / Vol. 76, No. 28 / Thursday, February 10, 2011 / Proposed Rules

general visual inspection, this AD requires doing a detailed inspection.

Other FAA AD Provisions

(h) 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: Cindy Ashforth, Aerospace Engineer, International Branch, ANM–116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057–3356; telephone 425– 227–2768; fax 425–227–1149. Information may be e-mailed to: 9-ANM-116-AMOCREQUESTS@faa.gov. 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 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.

Related Information

(i) Refer to MCAI Brazilian Airworthiness Directives 2010–06–01R1 and 2010–06–02R1, both dated August 25, 2010; and EMBRAER Service Bulletins 170–53–0082 and 190–53– 0042, both Revision 01, both dated April 28, 2010; for related information.

Issued in Renton, Washington, on February 3, 2011. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 2011–2926 Filed 2–9–11; 8:45 am]

**BILLING CODE 4910–13–P**

**DEPARTMENT OF TRANSPORTATION**

**Federal Aviation Administration**

**14 CFR Part 39**

**[Docket No. FAA–2011–0041; Directorate Identifier 2010–NM–227–AD]** 

**RIN 2120–AA64**

**Airworthiness Directives; The Boeing Company Model 747–400 and –400F**  **Series 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 would require a general visual inspection for cracks and holes of the main equipment center (MEC) drip shields, and repairs if necessary; installation of a fiberglass reinforcing overcoat; and, for certain airplanes, installation of stiffening panels to the MEC drip shields. This proposed AD was prompted by a report of a loss of bus control unit number 1 and generator control units numbers 1 and 2 while the airplane was on the ground, and multiple operator reports of cracked MEC drip shields. We are proposing this AD to prevent water penetration into the MEC, which could result in the loss of flight critical systems.

**DATES :**  We must receive comments on this proposed AD by March 28, 2011.

**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: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

For service information identified in this proposed AD, contact Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H–65, Seattle, Washington 98124– 2207; telephone 206–544–5000, extension 1; fax 206–766–5680; e-mail me.boecom@boeing.com; Internet https://www.myboeingfleet.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 Management Facility 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 Office (phone: 800–647–5527) is in the
**ADDRESSES** section. Comments will be available in the AD docket shortly after receipt.

**FOR FURTHER INFORMATION CONTACT :**  Marcia Smith, Aerospace Engineer, Cabin Safety & Environmental Systems Branch, ANM–150S, FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, Washington 98057–3356; phone: 425–917–6484; fax: 425–917–6590; e-mail: marcia.smith@faa.gov.

**SUPPLEMENTARY INFORMATION :** 
Comments Invited

We invite you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under the **ADDRESSES** section. Include ‘‘Docket No. FAA– 2011–0041; Directorate Identifier 2010– NM–227–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 because of those
comments.

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

We have received a report of a loss of bus control unit number 1 and generator control units numbers 1 and 2 while the airplane was on the ground, and multiple operators have reported cracked main equipment center (MEC) drip shields. Cracking in the MEC drip shield and exhaust plenum has been identified as part of the water leak path into the MEC. This condition, if not corrected, could result in water penetration into the MEC, which could result in the loss of flight critical systems.

Relevant Service Information

We reviewed Boeing Alert Service Bulletin 747–25A3588, dated July 19, 2010. The service information describes procedures for performing a general visual inspection of the MEC drip shield for cracks and holes, performing repairs if necessary, and installing a fiberglass reinforcing overcoat to the MEC drip shield. Additionally, for airplanes identified as Groups 1 and 3, the service information describes procedures for installing MEC drip shield panel stiffeners.

FAA’s Determination

We are proposing this AD because we evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or


### 7514 Federal Register / Vol. 76, No. 28 / Thursday, February 10, 2011 / Proposed Rules

develop in other products of the same type design. Proposed AD Requirements This proposed AD would require accomplishing the actions specified in the service information described previously. Costs of Compliance We estimate that this proposed AD affects 41 airplanes of U.S. registry.

We estimate the following costs to comply with this proposed AD:



### E STIMATED 

### C OSTS

Action Labor cost Parts cost Cost per product Cost on U.S. operators

Inspection and installation:

Groups 1, 3 (24 airplanes). 20 work-hours × $85 per hour = $1,700 ................ $1,109 ............................ $2,809 $67,416

Inspection and installation:

Group 2 (17 airplanes). 17 work-hours × $85 per hour = $1,445 ................ Negligible ....................... 1,445 24,565

We estimate the following costs to do any necessary repairs that would be required based on the results of the proposed inspection. We have no way of determining the number of aircraft that might need these repairs.



### O N 

### -C ONDITION 

### C OSTS

Action Labor cost Parts cost Cost per airplane

Hole repair ............................ 1 work-hour × $85 per hour = $85 per hole ..................... Negligible ............................. $85 per hole.

According to the manufacturer, some of the costs of this proposed AD may be covered under warranty, thereby reducing the cost impact on affected individuals. We do not control warranty coverage for affected individuals. As a result, we have included all costs in our cost estimate. 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),

(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. 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 airworthiness directive (AD): The Boeing Company: Docket No. FAA– 2011–0041; Directorate Identifier 2010– NM–227–AD. Comments Due Date (a) We must receive comments by March 28, 2011.

Affected ADs

(b) None.
Applicability

(c) This AD applies to The Boeing Company Model 747–400 and –400F series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 747–25A3588, dated July 19, 2010.
Subject

(d) Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code 25, Equipment/Furnishings.

Unsafe Condition

(e) This AD was prompted by a report of a loss of bus control unit number 1 and generator control units numbers 1 and 2 while the airplane was on the ground, and multiple operator reports of cracked main equipment center (MEC) drip shields. We are issuing this AD to prevent water penetration into the MEC, which could result in the loss of flight critical systems.
Compliance

(f) Comply with this AD within the compliance times specified, unless already done.
Inspection

(g) Within 24 months after the effective date of this AD, do the actions specified in paragraph (g)(1) or (g)(2) of this AD, as applicable, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747–25A3588, dated July 19,
2010.

(1) For Group 1 and Group 3 airplanes, as identified in Boeing Alert Service Bulletin 747–25A3588, dated July 19, 2010: Do a general visual inspection of the MEC drip


### 7515 Federal Register / Vol. 76, No. 28 / Thursday, February 10, 2011 / Proposed Rules

shield to detect cracking and holes; do all applicable repairs; and install the MEC drip shield panel stiffeners and the fiberglass reinforcing overcoat to the MEC drip shield; in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747–25A3588, dated July 19, 2010. Do all applicable repairs before further flight.

(2) For Group 2 airplanes, as identified in Boeing Alert Service Bulletin 747–25A3588, dated July 19, 2010: Do a general visual inspection of the MEC drip shield to detect cracking and holes; do all applicable repairs; and install the fiberglass reinforcing overcoat to the MEC drip shield; in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747–25A3588, dated July 19, 2010. Do all applicable repairs before further flight.
Alternative Methods of Compliance (AMOCs)

(h)(1) The Manager, Seattle Aircraft Certification Office (ACO), 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 the attention of the person identified in the Related Information section of this AD. Information may be e-mailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.

(2) 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.

Related Information

(i) For more information about this AD, contact Marcia Smith, Aerospace Engineer, Cabin Safety & Environmental Systems Branch, ANM–150S FAA, Seattle Aircraft Certification Office (ACO), 1601 Lind Avenue, SW., Renton, Washington 98057– 3356; phone: 425–917–6484; fax: 425–917– 6590; e-mail: marcia.smith@faa.gov.

(j) For service information identified in this AD, contact Boeing Commercial Airplanes,
Attention: Data & Services Management, P.O. Box 3707, MC 2H–65, Seattle, Washington 98124–2207; telephone 206–544–5000, extension 1; fax 206–766–5680; e-mail me.boecom@boeing.com; Internet https:// www.myboeingfleet.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.

Issued in Renton, Washington, on February 3, 2011. Ali Bahrami, Manager,Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. 2011–2952 Filed 2–9–11; 8:45 am]

**BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION** 

**Federal Aviation Administration**

**14 CFR Part 71**

**[Docket No. FAA–2010–0582; Airspace Docket No. 10–AEA–15]** 

**Proposed Establishment of Class E Airspace; Kenbridge, VA** 

**AGENCY :**  Federal Aviation Administration (FAA), DOT.

**ACTION :**  Notice of proposed rulemaking (NPRM); withdrawal.

**SUMMARY :**  This action withdraws the NPRM published in the Federal Register on November 29, 2010, which proposed to establish Class E airspace at Lunenburg County Airport, Kenbridge, VA. The NPRM is being withdrawn as a portion of the proposed airspace was not included. A new rulemaking will be forthcoming to correctly establish the new airspace.

**DATES :**  Effective 0901 UTC, February 10, 2011, the proposed rule published November 29, 2010, at 75 FR 73016, is withdrawn.

**FOR FURTHER INFORMATION CONTACT :**  Richard Horrocks, Operations Support Group, Eastern Service Center, Federal Aviation Administration, P.O. Box 20636, Atlanta, Georgia 30320; telephone (404) 305–5588.

**SUPPLEMENTARY INFORMATION :**  History

On November 29, 2010, a NPRM was published in the Federal Register to establish Class E airspace at Kenbridge, VA to accommodate special standard instrument approach procedure for Lunenburg County Airport (75 FR 73016) Docket No. FAA–2010–0582. After publication the FAA found that the airspace description in the proposed rule inadvertently excluded extensions necessary for the airport legal description. To avoid confusion this proposed rule is being withdrawn and will be established under another rulemaking. Lists of Subjects in 14 CFR Part 71

Airspace, Incorporation by reference, Navigation (Air).

The Withdrawal

Accordingly, pursuant to the authority delegated to me, the Notice of Proposed Rulemaking, Airspace Docket No. 10–AEA–15, as published in the Federal Register on November 29, 2010 (75 FR 73016) (FR Doc. 2010–0582), is hereby withdrawn. Authority: 49 U.S.C. 106(g); 40103, 40113, 40120; E.O. 10854, 24 FR 9565, 3 CFR, 1959– 1963 Comp., p. 389.

Issued in College Park, Georgia, on January 25, 2011. Mark D. Ward, Manager, Operations Support Group, Eastern Service Center, Air Traffic Organization.
[FR Doc. 2011–2986 Filed 2–9–11; 8:45 am]

**BILLING CODE 4910–13–P**

**DEPARTMENT OF HOMELAND SECURITY** 

**Coast Guard**

**33 CFR Part 165**

**[Docket No. USCG–2010–1097]**

**RIN 1625–AA00**

**Safety Zone; Mississippi River, Mile 842.0 to 839.5** 

**AGENCY :**  Coast Guard, DHS.

**ACTION :**  Notice of proposed rulemaking.

**SUMMARY :**  The Coast Guard proposes establishing a temporary safety zone for all waters of the Upper Mississippi River, Mile 842.0 to 839.5, extending the entire width of the river. This safety zone is needed to protect participants and event personnel during the swim leg of the OptumHealth Half Iron Triathlon occurring in the Upper Mississippi River. Entry into this zone would be prohibited unless specifically authorized by the Captain of the Port Upper Mississippi River or a designated representative.

**DATES :**  Comments and related material must be received by the Coast Guard on or before March 14, 2011.

**ADDRESSES :**  You may submit comments identified by docket number USCG– 2010–1097 using any one of the following methods:

(1) Federal eRulemaking Portal: http://www.regulations.gov.

(2) Fax: 202–493–2251. (3) Mail: Docket Management Facility (M–30), U.S. Department of Transportation, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590–
0001.

(4) Hand delivery: Same as mail address above, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The telephone number is 202–366–9329.

To avoid duplication, please use only one of these four methods. See the

‘‘Public Participation and Request for Comments ’’ portion of the

**SUPPLEMENTARY INFORMATION** section