Airworthiness Directives; Boeing Model 767-200, -300, and -300F Series Airplanes, 727-729 [05-166]

Download as PDF Federal Register / Vol. 70, No. 3 / Wednesday, January 5, 2005 / Proposed Rules Applicability DEPARTMENT OF TRANSPORTATION (c) This AD applies to Boeing Model 767– 300 series airplanes as listed in Boeing Special Attention Service Bulletin 767–21– 0188, dated May 27, 2004; and Boeing Model 767–400ER series airplanes, as listed in Boeing Special Attention Service Bulletin 767–21–0189, dated May 27, 2004; certificated in any category. Unsafe Condition (d) This AD was prompted by a report of an improperly designed component on the in-flight entertainment (IFE) cooling card, which may cause the IFE cooling system to incorrectly interpret signals from airplane system interfaces. We are issuing this AD to prevent failure of the IFE cooling card to configure correctly in response to input signals from airplane system interfaces during a forward cargo fire, which could result in the IFE cooling fan causing smoke to penetrate occupied areas of the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Replacement of IFE Cooling Card (f) Within 18 months after the effective date of this AD: Replace the IFE cooling card, part number (P/N) 285T1198–101, located in the P50 card file in the main equipment center, with a new, improved cooling card, P/N 285T1198–102. Do the replacement by accomplishing all of the actions specified in the Accomplishment Instructions of Boeing Special Attention Service Bulletin 767–21– 0188 (for Boeing Model 767–300 series airplanes); or 767–21–0189 (for Boeing Model 767–400ER series airplanes); both dated May 27, 2004; as applicable. Where the service bulletins state that the replacement may be done using an ‘‘operator’s equivalent procedure,’’ the replacement must be done according to the procedures in the chapter/ subject of the applicable Boeing 767 Airplane Maintenance Manual specified in the service bulletins. Parts Installation (g) As of the effective date of this AD, no person may install an IFE cooling card, P/N 285T1198–101, on any airplane. Alternative Methods of Compliance (AMOCs) (h) The Manager, Seattle Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Issued in Renton, Washington, on December 27, 2004. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–165 Filed 1–4–05; 8:45 am] BILLING CODE 4910–13–P VerDate jul<14>2003 16:24 Jan 04, 2005 Jkt 205001 Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2004–19990; Directorate Identifier 2004–NM–199–AD] RIN 2120–AA64 Airworthiness Directives; Boeing Model 767–200, –300, and –300F Series Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 767–200, –300, and –300F series airplanes. This proposed AD would require installing a new, improved foam seal around certain ducts in the forward cargo compartment. This proposed AD is prompted by the detection of incorrectly installed smoke barrier seals around the electrical/electronic equipment air supply and exhaust ducts. We are proposing this AD to prevent fire extinguishing agent from leaking out of the seals around the ducts in the forward cargo compartment in the event of an in-flight fire, which could result in failure to extinguish the fire and consequent smoke or fire extinguishing agent entering a compartment occupied by passengers or crew. DATES: We must receive comments on this proposed AD by February 22, 2005. ADDRESSES: Use one of the following addresses to submit comments on this proposed AD. • DOT Docket Web site: Go to https://dms.dot.gov and follow the instructions for sending your comments electronically. • Government-wide rulemaking Web site: Go to https://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. • By 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 service information identified in this proposed AD, contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207. You can examine the contents of this AD docket on the Internet at https:// PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 727 dms.dot.gov, or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., room PL–401, on the plaza level of the Nassif Building, Washington, DC. This docket number is FAA–2004– 19990; the directorate identifier for this docket is 2004–NM–199–AD. FOR FURTHER INFORMATION CONTACT: Technical information: Barbara Mudrovich, 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) 917–6477; fax (425) 917–6590. Plain language information: Marcia Walters, marcia.walters@faa.gov. SUPPLEMENTARY INFORMATION: Docket Management System (DMS) The FAA has implemented new procedures for maintaining AD dockets electronically. As of May 17, 2004, new AD actions are posted on DMS and assigned a docket number. We track each action and assign a corresponding directorate identifier. The DMS AD docket number is in the form ‘‘Docket No. FAA–2004–99999.’’ The Transport Airplane Directorate identifier is in the form ‘‘Directorate Identifier 2004–NM– 999–AD.’’ Each DMS AD docket also lists the directorate identifier (‘‘Old Docket Number’’) as a cross-reference for searching purposes. Comments Invited We invite you to submit any relevant written data, views, or arguments regarding this proposed AD. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA– 2004–19990; Directorate Identifier 2004–NM–199–AD’’ in the subject line of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments submitted by the closing date and may amend the proposed AD in light of those comments. We will post all comments we receive, without change, to https:// dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed AD. Using the search function of that Web site, anyone can find and read the comments in any of our dockets, including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You can E:\FR\FM\05JAP1.SGM 05JAP1 728 Federal Register / Vol. 70, No. 3 / Wednesday, January 5, 2005 / Proposed Rules review DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78), or you can visit https:// dms.dot.gov. We are reviewing the writing style we currently use in regulatory documents. We are interested in your comments on whether the style of this document is clear, and your suggestions to improve the clarity of our communications that affect you. You can get more information about plain language at https://www.faa.gov/language and https:// www.plainlanguage.gov. Examining the Docket You can examine the AD docket on the Internet at https://dms.dot.gov, or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647–5227) is located on the plaza level of the Nassif Building at the DOT street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after the DMS receives them. Discussion During production of certain Boeing Model 767–200, –300, and –300F series airplanes, incorrectly installed smoke barrier seals were found in the forward cargo compartment. The seals were located around the air supply and exhaust ducts of the electronic equipment bay. If these seals are not installed correctly, smoke and fire extinguishing agent could leak out of the ducts in the event of a fire, entering a compartment occupied by passengers or crew. Relevant Service Information We have reviewed Boeing Alert Service Bulletin 767–26A0119, Revision 1, dated July 15, 2004. The service bulletin describes procedures for installing a new, improved foam seal around certain ducts in the forward cargo compartment, as follows: • For Group 1 and 2 airplanes: Installing a new, improved foam seal around the four cooling air supply and exhaust ducts in the electrical/ electronic equipment bay. • For Group 2 airplanes: Installing a new, improved foam seal around the avionics cooling and refrigeration unit (ACRU) duct. Accomplishing the actions specified in the service information is intended to adequately address the unsafe condition. VerDate jul<14>2003 16:24 Jan 04, 2005 Jkt 205001 FAA’s Determination and Requirements of the Proposed AD We have evaluated all pertinent information and identified an unsafe condition that is likely to exist or develop on other airplanes of this same type design. Therefore, we are proposing this AD, which would require accomplishing the actions specified in the service information described previously. Costs of Compliance There are about 468 airplanes of the affected design in the worldwide fleet. This proposed AD would affect about 342 airplanes of U.S. registry. For Group 1 and 2 airplanes: The proposed foam seal installation around the cooling air supply and exhaust ducts would take about 2 work hours per airplane, at an average labor rate of $65 per work hour. The cost of parts would be minimal. Based on these figures, the estimated cost of the proposed installation is $130 per airplane. For Group 2 airplanes: The proposed foam seal installation around the ACRU duct would take about 2 work hours per airplane, at an average labor rate of $65 per work hour. The cost of parts would be minimal. Based on these figures, the estimated cost of the proposed installation is $130 per airplane. Authority for This Rulemaking The FAA’s authority to issue rules regarding aviation safety is found in Title 49 of the United States Code. 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. This rulemaking is promulgated 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 AD. Regulatory Findings We have determined that this proposed AD will not have federalism implications under Executive Order 13132. This proposed AD will 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 PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 responsibilities among the various levels of government. For the reasons discussed above, I certify that the 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. See the ADDRESSES section for a location to examine the regulatory evaluation. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, 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): Boeing: Docket No. FAA–2004–19990; Directorate Identifier 2004–NM–199–AD. Comments Due Date (a) The Federal Aviation Administration (FAA) must receive comments on this AD action by February 22, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Boeing Model 767– 200, –300, and –300F series airplanes, certificated in any category; as listed in Boeing Alert Service Bulletin 767–26A0119, Revision 1, dated July 15, 2004. Unsafe Condition (d) This AD was prompted by the detection of incorrectly installed smoke barrier seals around the electrical/electronic equipment air supply and exhaust ducts. We are issuing this AD to prevent fire extinguishing agent from leaking out of the seals around the ducts in the forward cargo compartment in the event of an in-flight fire, which could result in failure to extinguish the fire and consequent smoke or fire extinguishing agent entering a compartment occupied by passengers or crew. E:\FR\FM\05JAP1.SGM 05JAP1 Federal Register / Vol. 70, No. 3 / Wednesday, January 5, 2005 / Proposed Rules Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Seal Installation (f) Within 24 months or 8,000 flight hours after the effective date of this AD, whichever is first: Do the applicable actions required by paragraphs (f)(1) and (f)(2) of this AD by doing all the actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 767–26A0119, Revision 1, dated July 15, 2004. (1) For Group 1 and 2 airplanes: Install a foam seal around the four cooling air supply and exhaust ducts in the electrical/electronic equipment bay in the forward cargo compartment. (2) For Group 2 airplanes: Install a foam seal around the avionics cooling and refrigeration unit duct in the forward cargo compartment. Credit for Actions Accomplished Previously (g) Accomplishing the applicable actions before the effective date of this AD in accordance with Boeing Alert Service Bulletin 767–26A0119, dated April 19, 2001; is considered acceptable for compliance with the corresponding actions in paragraph (f)(1) of this AD. Alternative Methods of Compliance (AMOCs) (h) The Manager, Seattle Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Issued in Renton, Washington, on December 27, 2004. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–166 Filed 1–4–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2004–19988; Directorate Identifier 2004–NM–30–AD] RIN 2120–AA64 Airworthiness Directives; Boeing Model 727–200 Series Airplanes Equipped With a No. 3 Cargo Door Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 727–200 series airplanes equipped with a No. 3 cargo VerDate jul<14>2003 16:24 Jan 04, 2005 Jkt 205001 door. This proposed AD would require repetitive detailed and high frequency eddy current inspections for cracking of the forward, lower corner frame and forward end of the lower beam of the No. 3 cargo door, and corrective actions if necessary. The proposed AD provides an optional terminating action for the repetitive inspections. This proposed AD is prompted by reports of cracking at the forward, lower corner frame and lower beam of the No. 3 cargo door. We are proposing this AD to detect and correct cracking of the forward, lower corner frame and forward end of the lower beam of the No. 3 cargo door, which could result in failure of the affected door stops, loss of the cargo door, and consequent rapid decompression of the airplane. DATES: We must receive comments on this proposed AD by February 22, 2005. ADDRESSES: Use one of the following addresses to submit comments on this proposed AD. • DOT Docket Web site: Go to https://dms.dot.gov and follow the instructions for sending your comments electronically. • Government-wide rulemaking Web site: Go to https://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. • By 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. You can get the service information identified in this proposed AD from Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207. You may examine the contents of this AD docket on the Internet at https:// dms.dot.gov, or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL–401, on the plaza level of the Nassif Building, Washington, DC. FOR FURTHER INFORMATION CONTACT: Technical information: Daniel F. Kutz, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6456; fax (425) 917–6590. Plain language information: Marcia Walters, marcia.walters@faa.gov. SUPPLEMENTARY INFORMATION: Docket Management System (DMS) The FAA has implemented new procedures for maintaining AD dockets PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 729 electronically. As of May 17, 2004, new AD actions are posted on DMS and assigned a docket number. We track each action and assign a corresponding directorate identifier. The DMS AD docket number is in the form ‘‘Docket No. FAA–2004–99999.’’ The Transport Airplane Directorate identifier is in the form ‘‘Directorate Identifier 2004–NM– 999–AD.’’ Each DMS AD docket also lists the directorate identifier (‘‘Old Docket Number’’) as a cross-reference for searching purposes. Comments Invited We invite you to submit any written relevant data, views, or arguments regarding this proposed AD. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA– 2004–19988; Directorate Identifier 2004–NM–30–AD’’ in the subject line of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments submitted by the closing date and may amend the proposed AD in light of those comments. We will post all comments we receive, without change, to https:// dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed AD. Using the search function of that Web site, anyone can find and read the comments in any of our dockets, including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78), or you may visit https:// dms.dot.gov. We are reviewing the writing style we currently use in regulatory documents. We are interested in your comments on whether the style of this document is clear, and your suggestions to improve the clarity of our communications that affect you. You can get more information about plain language at https://www.faa.gov/language and https:// www.plainlanguage.gov. Examining the Docket You may examine the AD docket in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647–5227) is located on the plaza level of the Nassif Building at the DOT E:\FR\FM\05JAP1.SGM 05JAP1

Agencies

[Federal Register Volume 70, Number 3 (Wednesday, January 5, 2005)]
[Proposed Rules]
[Pages 727-729]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-166]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2004-19990; Directorate Identifier 2004-NM-199-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 767-200, -300, and -300F 
Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Boeing Model 767-200, -300, and -300F series airplanes. 
This proposed AD would require installing a new, improved foam seal 
around certain ducts in the forward cargo compartment. This proposed AD 
is prompted by the detection of incorrectly installed smoke barrier 
seals around the electrical/electronic equipment air supply and exhaust 
ducts. We are proposing this AD to prevent fire extinguishing agent 
from leaking out of the seals around the ducts in the forward cargo 
compartment in the event of an in-flight fire, which could result in 
failure to extinguish the fire and consequent smoke or fire 
extinguishing agent entering a compartment occupied by passengers or 
crew.

DATES: We must receive comments on this proposed AD by February 22, 
2005.

ADDRESSES: Use one of the following addresses to submit comments on 
this proposed AD.
     DOT Docket Web site: Go to https://dms.dot.gov and follow 
the instructions for sending your comments electronically.
     Government-wide rulemaking Web site: Go to https://
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.
     By 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 service information identified in this proposed AD, contact 
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-
2207.
    You can examine the contents of this AD docket on the Internet at 
https://dms.dot.gov, or in person at the Docket Management Facility, 
U.S. Department of Transportation, 400 Seventh Street, SW., room PL-
401, on the plaza level of the Nassif Building, Washington, DC. This 
docket number is FAA-2004-19990; the directorate identifier for this 
docket is 2004-NM-199-AD.

FOR FURTHER INFORMATION CONTACT:
    Technical information: Barbara Mudrovich, 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) 917-6477; fax (425) 917-6590.
    Plain language information: Marcia Walters, marcia.walters@faa.gov.

SUPPLEMENTARY INFORMATION:

Docket Management System (DMS)

    The FAA has implemented new procedures for maintaining AD dockets 
electronically. As of May 17, 2004, new AD actions are posted on DMS 
and assigned a docket number. We track each action and assign a 
corresponding directorate identifier. The DMS AD docket number is in 
the form ``Docket No. FAA-2004-99999.'' The Transport Airplane 
Directorate identifier is in the form ``Directorate Identifier 2004-NM-
999-AD.'' Each DMS AD docket also lists the directorate identifier 
(``Old Docket Number'') as a cross-reference for searching purposes.

Comments Invited

    We invite you to submit any relevant written data, views, or 
arguments regarding this proposed AD. Send your comments to an address 
listed under ADDRESSES. Include ``Docket No. FAA-2004-19990; 
Directorate Identifier 2004-NM-199-AD'' in the subject line of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the proposed AD. We will 
consider all comments submitted by the closing date and may amend the 
proposed AD in light of those comments.
    We will post all comments we receive, without change, to https://
dms.dot.gov, including any personal information you provide. We will 
also post a report summarizing each substantive verbal contact with FAA 
personnel concerning this proposed AD. Using the search function of 
that Web site, anyone can find and read the comments in any of our 
dockets, including the name of the individual who sent the comment (or 
signed the comment on behalf of an association, business, labor union, 
etc.). You can

[[Page 728]]

review DOT's complete Privacy Act Statement in the Federal Register 
published on April 11, 2000 (65 FR 19477-78), or you can visit https://
dms.dot.gov.
    We are reviewing the writing style we currently use in regulatory 
documents. We are interested in your comments on whether the style of 
this document is clear, and your suggestions to improve the clarity of 
our communications that affect you. You can get more information about 
plain language at https://www.faa.gov/language and https://
www.plainlanguage.gov.

Examining the Docket

    You can examine the AD docket on the Internet at https://
dms.dot.gov, or in person at the Docket Management Facility office 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT 
street address stated in the ADDRESSES section. Comments will be 
available in the AD docket shortly after the DMS receives them.

Discussion

    During production of certain Boeing Model 767-200, -300, and -300F 
series airplanes, incorrectly installed smoke barrier seals were found 
in the forward cargo compartment. The seals were located around the air 
supply and exhaust ducts of the electronic equipment bay. If these 
seals are not installed correctly, smoke and fire extinguishing agent 
could leak out of the ducts in the event of a fire, entering a 
compartment occupied by passengers or crew.

Relevant Service Information

    We have reviewed Boeing Alert Service Bulletin 767-26A0119, 
Revision 1, dated July 15, 2004. The service bulletin describes 
procedures for installing a new, improved foam seal around certain 
ducts in the forward cargo compartment, as follows:
     For Group 1 and 2 airplanes: Installing a new, improved 
foam seal around the four cooling air supply and exhaust ducts in the 
electrical/electronic equipment bay.
     For Group 2 airplanes: Installing a new, improved foam 
seal around the avionics cooling and refrigeration unit (ACRU) duct.
    Accomplishing the actions specified in the service information is 
intended to adequately address the unsafe condition.

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to exist or develop on other airplanes 
of this same type design. Therefore, we are proposing this AD, which 
would require accomplishing the actions specified in the service 
information described previously.

Costs of Compliance

    There are about 468 airplanes of the affected design in the 
worldwide fleet. This proposed AD would affect about 342 airplanes of 
U.S. registry.
    For Group 1 and 2 airplanes: The proposed foam seal installation 
around the cooling air supply and exhaust ducts would take about 2 work 
hours per airplane, at an average labor rate of $65 per work hour. The 
cost of parts would be minimal. Based on these figures, the estimated 
cost of the proposed installation is $130 per airplane.
    For Group 2 airplanes: The proposed foam seal installation around 
the ACRU duct would take about 2 work hours per airplane, at an average 
labor rate of $65 per work hour. The cost of parts would be minimal. 
Based on these figures, the estimated cost of the proposed installation 
is $130 per airplane.

Authority for This Rulemaking

    The FAA's authority to issue rules regarding aviation safety is 
found in Title 49 of the United States Code. 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.
    This rulemaking is promulgated 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 AD.

Regulatory Findings

    We have determined that this proposed AD will not have federalism 
implications under Executive Order 13132. This proposed AD will 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 that the 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. See the ADDRESSES section for a location 
to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, 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.


Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new 
airworthiness directive (AD):

Boeing: Docket No. FAA-2004-19990; Directorate Identifier 2004-NM-
199-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this AD action by February 22, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Boeing Model 767-200, -300, and -300F 
series airplanes, certificated in any category; as listed in Boeing 
Alert Service Bulletin 767-26A0119, Revision 1, dated July 15, 2004.

Unsafe Condition

    (d) This AD was prompted by the detection of incorrectly 
installed smoke barrier seals around the electrical/electronic 
equipment air supply and exhaust ducts. We are issuing this AD to 
prevent fire extinguishing agent from leaking out of the seals 
around the ducts in the forward cargo compartment in the event of an 
in-flight fire, which could result in failure to extinguish the fire 
and consequent smoke or fire extinguishing agent entering a 
compartment occupied by passengers or crew.

[[Page 729]]

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Seal Installation

    (f) Within 24 months or 8,000 flight hours after the effective 
date of this AD, whichever is first: Do the applicable actions 
required by paragraphs (f)(1) and (f)(2) of this AD by doing all the 
actions specified in the Accomplishment Instructions of Boeing Alert 
Service Bulletin 767-26A0119, Revision 1, dated July 15, 2004.
    (1) For Group 1 and 2 airplanes: Install a foam seal around the 
four cooling air supply and exhaust ducts in the electrical/
electronic equipment bay in the forward cargo compartment.
    (2) For Group 2 airplanes: Install a foam seal around the 
avionics cooling and refrigeration unit duct in the forward cargo 
compartment.

Credit for Actions Accomplished Previously

    (g) Accomplishing the applicable actions before the effective 
date of this AD in accordance with Boeing Alert Service Bulletin 
767-26A0119, dated April 19, 2001; is considered acceptable for 
compliance with the corresponding actions in paragraph (f)(1) of 
this AD.

Alternative Methods of Compliance (AMOCs)

    (h) The Manager, Seattle Aircraft Certification Office, FAA, has 
the authority to approve AMOCs for this AD, if requested in 
accordance with the procedures found in 14 CFR 39.19.

    Issued in Renton, Washington, on December 27, 2004.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-166 Filed 1-4-05; 8:45 am]
BILLING CODE 4910-13-P

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