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

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 


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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: 

ESTIMATED COSTS

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. 

ON-CONDITION COSTS

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 


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

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 


jdjones on DSK8KYBLC1PROD with PROPOSALS-1