Airworthiness directives: Boeing,

[Federal Register: June 6, 2005 (Volume 70, Number 107)]

[Proposed Rules]

[Page 32738-32739]

From the Federal Register Online via GPO Access [wais.access.gpo.gov]

[DOCID:fr06jn05-10]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-20836; Directorate Identifier 2005-NM-028-AD]

RIN 2120-AA64

Airworthiness Directives; Boeing Model 727-200 and 727-200F Series Airplanes; 737-200, 737-200C, 737-300, and 737-400 Series Airplanes; 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747- 200F, 747-300, 747-400, 747SR, and 747SP Series Airplanes; 757-200 and 757-200PF Series Airplanes; and 767-200 and 767-300 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 above- referenced NPRM, which proposes the adoption of a new airworthiness directive (AD) that applies to certain Boeing transport category airplanes. The NRPM would require replacing any insulation blanket constructed of polyethyleneteraphthalate (PET) film, ORCON Orcofilm[supreg] AN-26 with a new insulation blanket. The NPRM results from reports of in-flight and ground fires on certain airplanes manufactured with insulation blankets covered with AN-26, which may contribute to the spread of a fire when ignition occurs from sources such as electrical arcing or sparking. 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 August 3, 2005.

ADDRESSES: Use one of the following addresses to submit comments on this proposed AD.

DOT Docket Web site: Go to http://dms.dot.gov and follow

the instructions for sending your comments electronically.

Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your

comments electronically.

Mail: Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, Washington, DC 20590.

Fax: (202) 493-2251.

Hand Delivery: Room PL-401 on the plaza level of the Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Sue Rosanske, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 917-6448; 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 727-200 and 727-200F series airplanes; 737- 200, 737-200C, 737-300, and 737-400 series airplanes; 747-100, 747- 100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747SR, and 747SP series airplanes; 757-200 and 757-200PF series airplanes; and 767-200 and 767-300 series airplanes. The original NPRM was published in the Federal Register on April 4, 2005 (70 FR 16986). The original NPRM proposed to require replacing any insulation blanket constructed of polyethyleneteraphthalate (PET) film, ORCON Orcofilm[supreg] AN-26 with a new insulation blanket. The original NPRM also invites comments on its overall regulatory, economic, environmental, and energy aspects.

Events Leading to Extension of Comment Period

Since the issuance of that original NPRM, a commenter has requested a 60-day extension of the comment period because of the extensive scope and significant potential impact of the original NPRM, the lack of associated service information, and the need for proper review of the results of prototype efforts. The commenter states that the additional time would provide operators time to study the proposed requirements of the original NPRM, to assess and compare compliance concepts with the manufacturers, to develop initial plans for developing and getting FAA approval of service information, and to prepare comments for the Rules Docket.

[[Page 32739]]

FAA's Determination

We have considered the commenter's request 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. We have determined that extending the comment period by 60 days will not compromise the safety of these airplanes.

Extension of Comment Period

The comment period for Docket No. FAA-2005-20836, Directorate Identifier 2005-NM-028-AD, has been revised. The comment period now closes on August 3, 2005.

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 May 27, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service.

[FR Doc. 05-11252 Filed 6-2-05; 10:56 am]

BILLING CODE 4910-13-P