Federal Register / Vol. 72, No. 219 / Wednesday, November 14, 2007 / Proposed Rules 64009 

For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Long Beach Division, 3855 

Lakewood Boulevard, Long Beach, 

California 90846, Attention: Data and 

Service Management, Dept. C1–L5A 

(D800–0024). 

FOR FURTHER INFORMATION CONTACT: 

Roger Durbin, Aerospace Engineer, 

Airframe Branch, ANM–120L, FAA, Los 

Angeles Aircraft Certification Office, 

3960 Paramount Boulevard, Lakewood, 

California 90712–4137; telephone (562) 

627–5233; fax (562) 627–5210. 

SUPPLEMENTARY INFORMATION: We 

proposed to amend 14 CFR part 39 with 

a notice of proposed rulemaking 

(NPRM) for an AD (the ‘‘original 

NPRM’’) for all McDonnell Douglas 

Model DC–9–81 (MD–81), DC–9–82 

(MD–82), DC–9–83 (MD–83), DC–9–87 

(MD–87), and MD–88 airplanes. The 

original NPRM was published in the 

Federal Register on September 28, 2007 

(72 FR 55111). The original NPRM 

proposed to require repetitive 

inspections for cracking of the overwing 

frames from stations 845 to 905 (MD–87 

stations 731 to 791), left and right sides, 

and corrective actions if necessary. The 

original NPRM also invites comments 

on its overall regulatory, economic, 

environmental, and energy aspects. 

Events Leading to Extension of 

Comment Period 

Since we issued the NPRM, the DOT’s 

Docket Management System (DMS) was 

replaced by the Federal Docket 

Management System (FDMS). FDMS is 

a government-wide, electronic docket 

management system, which contains the 

public dockets and is the method used 

for submitting comments on the overall 

regulatory, economic, environmental, 

and energy aspects of proposed 

rulemaking actions. However, due to the 

service disruption caused by the 

transition from DOT’s DMS to the 

FDMS, the docket material was not 

posted on the FDMS until November 1, 

2007. Therefore, we have determined 

that the public was not provided 

adequate opportunity to submit 

comments on the NPRM. As a result, we 

have decided to extend the comment 

period for this NPRM until December 3, 

2007, to receive additional comments. 

FAA’s Determination 

We have considered this issue and 

find it appropriate to extend the 

comment period to give all interested 

persons additional time to examine the 

proposed requirements of the original 

NPRM and submit comments. After 

evaluating the circumstances stated 

previously, we have determined that 

extending the comment period until 

December 3, 2007, will not compromise 

the safety of these airplanes. 

Extension of Comment Period 

The comment period for Docket No. 

FAA–2007–29335; Directorate Identifier 

2007–NM–045–AD; has been revised. 

The comment period now closes 

December 3, 2007. 

No other part of the regulatory 

information has been changed; 

therefore, the original NPRM is not 

republished in the Federal Register. 

Issued in Renton, Washington, on 

November 7, 2007. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 07–5654 Filed 11–9–07; 10:10 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2007–29333; Directorate 

Identifier 2007–NM–141–AD] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 737–600, –700, –700C, –800, and 

–900 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Notice of proposed rulemaking 

(NPRM); extension of comment period. 

SUMMARY: This document extends the 

comment period for the abovereferenced NPRM, which proposes the 

adoption of a new airworthiness 

directive (AD) that applies to certain 

Boeing Model 737–600, –700, –700C, 

–800, and –900 series airplanes. The 

NRPM would require various repetitive 

inspections to detect cracks along the 

chemically milled steps of the fuselage 

skin or missing or loose fasteners in the 

area of the preventative modification or 

repairs, replacement of the time-limited 

repair with the permanent repair if 

applicable, and applicable corrective 

actions if necessary, which would end 

certain repetitive inspections. The 

NPRM results from a fatigue test that 

revealed numerous cracks in the upper 

skin panel at the chemically milled step 

above the lap joint. This extension of 

the comment period is necessary to 

ensure that all interested persons have 

ample opportunity to submit any 

written relevant data, views, or 

arguments regarding the NPRM. 

DATES: We must receive comments on 

this NPRM by December 3, 2007. 

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 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, P.O. Box 3707, Seattle, 

Washington 98124–2207. 

FOR FURTHER INFORMATION CONTACT: 

Wayne Lockett, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6447; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: We 

proposed to amend 14 CFR part 39 with 

a notice of proposed rulemaking 

(NPRM) for an AD (the ‘‘original 

NPRM’’) for certain Boeing Model 737–

600, –700, –700C, –800, and –900 series 

airplanes. The original NPRM was 

published in the Federal Register on 

September 28, 2007 (72 FR 55118). The 

original NPRM proposed to require 

various repetitive inspections to detect 

cracks along the chemically milled steps 

of the fuselage skin or missing or loose 

fasteners in the area of the preventative 

modification or repairs, replacement of 

the time-limited repair with the 

permanent repair if applicable, and 

applicable corrective actions if 

necessary, which would end certain 

repetitive inspections. The original 

NPRM also invites comments on its 

overall regulatory, economic, 

environmental, and energy aspects. 

Events Leading to Extension of 

Comment Period 

Since we issued the NPRM, the DOT’s 

Docket Management System (DMS) was 

replaced by the Federal Docket 

Management System (FDMS). FDMS is 

a government-wide, electronic docket 

management system, which contains the 

public dockets and is the method used 

for submitting comments on the overall 

regulatory, economic, environmental, 

and energy aspects of proposed 

rulemaking actions. However, due to the 


pwalker on PROD1PC71 with PROPOSALS
64010 Federal Register / Vol. 72, No. 219 / Wednesday, November 14, 2007 / Proposed Rules 

service disruption caused by the 

transition from DOT’s DMS to the 

FDMS, the docket material was not 

posted on the FDMS until November 1, 

2007. Therefore, we have determined 

that the public was not provided 

adequate opportunity to submit 

comments on the NPRM. As a result, we 

have decided to extend the comment 

period for this NPRM until December 3, 

2007, to receive additional comments. 

FAA’s Determination 

We have considered this issue and 

find it appropriate to extend the 

comment period to give all interested 

persons additional time to examine the 

proposed requirements of the original 

NPRM and submit comments. After 

evaluating the circumstances stated 

previously, we have determined that 

extending the comment period until 

December 3, 2007, will not compromise 

the safety of these airplanes. 

Extension of Comment Period 

The comment period for Docket No. 

FAA–2007–29333; Directorate Identifier 

2007–NM–141–AD; has been revised. 

The comment period now closes 

December 3, 2007. 

No other part of the regulatory 

information has been changed; 

therefore, the original NPRM is not 

republished in the Federal Register. 

Issued in Renton, Washington, on 

November 7, 2007. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 07–5656 Filed 11–9–07; 10:10 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2007–27192; Directorate 

Identifier 2007–CE–008–AD] 

RIN 2120–AA64 

Airworthiness Directives; Viking Air 

Limited Model DHC–6 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (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: 

Certain structural components must be 

replaced by new components at a certain 

stage of the aircraft’s life to avoid any 

possibility of fatigue failure. 

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 14, 

2007. 

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 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

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, U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue, SE., Washington, 

DC 20590. 

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 

(telephone (800) 647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

George Duckett, Aerospace Engineer, 

FAA, New York Certification Office, 

1600 Stewart Avenue, suite 410, 

Westbury, New York 11590; telephone: 

(516) 228–7325; 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–2007–27192; Directorate Identifier 

2007–CE–008–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:// 

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 

On February 4, 1983, we issued AD 

83–02–02, Amendment 39–4553. That 

AD required actions intended to address 

an unsafe condition on the products 

listed above. 

Since we issued AD 83–02–02, 

structural evaluations of the DHC–6 

series airplanes have shown that the 

service life limits and inspection 

schedules need to be revised. 

Transport Canada, which is the 

aviation authority for Canada, has 

issued AD No. CF–2000–14, dated May 

25, 2000, (referred to after this as ‘‘the 

MCAI’’), to correct an unsafe condition 

for the specified products. The MCAI 

refers to the Product Support Manual 

(PSM) 1–6–11, Revision 5, dated 

January 11, 2000, which describes the 

unsafe condition as: 

Certain structural components must be 

replaced by new components at a certain 

stage of the aircraft’s life to avoid any 

possibility of fatigue failure. 

The MCAI requires you to inspect, 

modify, and/or retire affected structural 

components to maintain the structural 

integrity of DHC–6 airplanes. 

You may obtain further information 

by examining the MCAI in the AD 

docket. 

Relevant Service Information 

Viking Air Limited has issued PSM 1–

6–11, Revision 6, dated March 28, 2007. 

The actions described in this service 

information are intended to correct the 

unsafe condition identified in the 

MCAI. 

FAA’s Determination and Requirements 

of the 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 this State of 

Design Authority, they have notified us 


pwalker on PROD1PC71 with PROPOSALS