Airworthiness Directives; Pratt & Whitney Canada (P&WC) JT15D-5; -5B; -5F; and -5R Turbofan Engines, 49619-49621 [E8-19390]

Download as PDF 49619 Proposed Rules Federal Register Vol. 73, No. 164 Friday, August 22, 2008 This section of the FEDERAL REGISTER contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules. DEPARTMENT OF AGRICULTURE Agricultural Marketing Service 7 CFR Part 915 [Docket No. AMS–FV–08–0058; FV08–915– 2] Avocados Grown in South Florida; Continuance Referendum Agricultural Marketing Service, USDA. ACTION: Referendum order. yshivers on PROD1PC62 with PROPOSALS AGENCY: SUMMARY: This document directs that a referendum be conducted among eligible Florida avocados growers to determine whether they favor continuance of the marketing order regulating the handling of avocados grown in South Florida. DATES: The referendum will be conducted from September 22 to October 6, 2008. To vote in this referendum, growers must have been producing Florida avocados within the designated production area during the period April 1, 2007, through March 31, 2008. ADDRESSES: Copies of the marketing order may be obtained from the Southeast Marketing Field Office, Marketing Order Administration Branch, Fruit and Vegetable Division, AMS, U.S. Department of Agriculture, 799 Overlook Dr. Suite A, Winter Haven, FL 33884–1671, or the Office of the Docket Clerk, Marketing Order Administration Branch, Fruit and Vegetable Programs, AMS, USDA, 1400 Independence Avenue, SW., STOP 0237, Washington, DC 20250–0237. FOR FURTHER INFORMATION CONTACT: William G. Pimental, Marketing Specialist, or Christian D. Nissen, Regional Manager, Southeast Marketing Field Office, Marketing Order Administration Branch, Fruit and Vegetable Programs, AMS, USDA; Telephone: (863) 324–3375, Fax: (863) 325–8793 or E-mail: William.Pimental@usda.gov or VerDate Aug<31>2005 15:15 Aug 21, 2008 Jkt 214001 Christian.Nissen@usda.gov, respectively. Pursuant to Marketing Order No. 915 (7 CFR part 915), hereinafter referred to as the ‘‘order,’’ and the applicable provisions of the Agricultural Marketing Agreement Act of 1937, as amended (7 U.S.C. 601–674), hereinafter referred to as the ‘‘Act,’’ it is hereby directed that a referendum be conducted to ascertain whether continuance of the order is favored by growers. The referendum shall be conducted from September 22 to October 6, 2008, among eligible Florida avocado growers in the production area. Only growers that were engaged in the production of Florida avocados during the period of April 1, 2007, to March 31, 2008, may participate in the continuance referendum. USDA has determined that continuance referenda are an effective means for determining whether growers favor the continuation of marketing order programs. USDA would consider termination of the order if less than twothirds of the growers voting in the referendum, and growers of less than two-thirds of the volume of Florida avocados represented in the referendum favor continuance of their program. In evaluating the merits of continuance versus termination, USDA will consider the results of the continuance referendum and other relevant information regarding operation of the order. USDA will evaluate the order’s relative benefits and disadvantages to growers, handlers, and consumers to determine whether continuing the order would tend to effectuate the declared policy of the Act. In accordance with the Paperwork Reduction Act of 1995 (44 U.S.C. Chapter 35), the ballot materials used in the referendum herein ordered, have been approved by the Office of Management and Budget (OMB), under OMB No. 0581–0189, OMB Generic Fruit Crops. It has been estimated that it will take an average of 5 minutes for each of the approximately 300 production area growers of Florida avocados to cast a ballot. Participation is voluntary. Ballots postmarked after October 6, 2008, will not be included in the vote tabulation. Christian D. Nissen and William G. Pimental of the Southeast Marketing Field Office, Fruit and Vegetable SUPPLEMENTARY INFORMATION: PO 00000 Frm 00001 Fmt 4702 Sfmt 4702 Programs, AMS, USDA, are hereby designated as the referendum agents of the Secretary of Agriculture to conduct this referendum. The procedure applicable to the referendum shall be the ‘‘Procedure for the Conduct of Referenda in Connection With Marketing Orders for Fruits, Vegetables, and Nuts Pursuant to the Agricultural Marketing Agreement Act of 1937, as Amended’’ (7 CFR 900.400 et seq.). Ballots will be mailed to all growers of record and may also be obtained from the referendum agents, or from their appointees. List of Subjects in 7 CFR Part 915 Avocados, Reporting and recordkeeping requirements. Authority: 7 U.S.C. 601–674. Dated: August 18, 2008. Lloyd C. Day, Administrator, Agricultural Marketing Service. [FR Doc. E8–19467 Filed 8–21–08; 8:45 am] BILLING CODE 3410–02–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2008–0752; Directorate Identifier 2008–NE–22–AD] RIN 2120–AA64 Airworthiness Directives; Pratt & Whitney Canada (P&WC) JT15D–5; –5B; –5F; and –5R Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued 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 follows: There have been several reported incidents of high altitude, dual engine flameout on JT15D–5 engines powered aircraft operating in certain meteorological conditions. Subsequent to the investigation of incidents, E:\FR\FM\22AUP1.SGM 22AUP1 49620 Federal Register / Vol. 73, No. 164 / Friday, August 22, 2008 / Proposed Rules review of the engine design has revealed that the Fuel Control Hydro Mechanical Unit (HMU) P3 servo can be exposed to excessive moisture and freezing. We are proposing this AD to prevent engine flameout, and possible dualengine flameout events, caused by excessive moisture and freezing in the P3 servo, during certain flight conditions. DATES: We must receive comments on this proposed AD by September 22, 2008. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov and follow the instructions for sending your comments electronically. • Mail: Docket Management Facility, U.S. Department of Transportation, 1200 New Jersey Avenue, SE., West Building Ground Floor, Room W12–140, Washington, DC 20590–0001. • Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. • Fax: (202) 493–2251. yshivers on PROD1PC62 with PROPOSALS Examining the AD Docket You may examine the AD docket on the Internet at https:// www.regulations.gov; or in person at the Docket Operations office 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 Operations office (telephone (800) 647–5527) is the same as the Mail address provided in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Ian Dargin, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park; Burlington, MA 01803; e-mail: ian.dargin@faa.gov; telephone (781) 238–7178; fax (781) 238–7199. 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–2008–0752; Directorate Identifier 2008–NE–22–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 VerDate Aug<31>2005 15:15 Aug 21, 2008 Jkt 214001 closing date and may amend this proposed AD based on those comments. We will post all comments we receive, without change, to https:// www.regulations.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 the Web site, anyone can find and read the comments in any of our dockets, including, if provided, 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 the DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78). Discussion Transport Canada, which is the aviation authority for Canada, has issued Canadian AD CF–2008–23, dated June 27, 2008 (referred to after this as ‘‘the MCAI’’), to correct an unsafe condition for the specified products. The MCAI states the following: There have been several reported incidents of high altitude, dual engine flameout on JT15D–5 engine powered aircraft operating in certain meteorological conditions. Subsequent to the investigation of incidents, review of the engine design has revealed that the Fuel Control HMU P3 servo can be exposed to excessive moisture and freezing. To preclude P3 servo freezing, P&WC has issued JT15D ASB No. JT15D–72–A7611 to re-route compressor delivery air to the HMU and improve moisture separation. You may obtain further information by examining the MCAI in the AD docket. Relevant Service Information P&WC has issued ASB No. JT15D–72– A7611, Revision 1, dated June 16, 2008. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI. FAA’s Determination and Requirements of This Proposed AD This product has been approved by the aviation authority of Canada, and is approved for operation in the United States. Pursuant to our bilateral agreement with Canada, they have notified us of the unsafe condition described in the MCAI and service information referenced above. We are proposing this AD because we evaluated all the information provided by Canada and determined the unsafe condition exists and is likely to exist or develop on other products of the same type design. This proposed AD requires replacing the compressor air to HMU PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 delivery tube with a new, re-routed tube. The new tube provides warmer and dryer P3 air, improves moisture separation, and directs the moisture away from the HMU through a drain hole. Costs of Compliance Based on the service information, we estimate that this proposed AD would affect about 1,500 products of U.S. registry. We also estimate that it would take about 3 work-hours per product to comply with this proposed AD. The average labor rate is $80 per work-hour. Required parts would cost about $1,981 per product for JT15D–5 and –5R engines, and $3,169 per product for JT15D–5B and –5R engines. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $4,222,500. Our cost estimate is exclusive of possible warranty coverage. 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); and 3. Will not have a significant economic impact, positive or negative, E:\FR\FM\22AUP1.SGM 22AUP1 Federal Register / Vol. 73, No. 164 / Friday, August 22, 2008 / Proposed Rules 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 and placed it in the AD docket. 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: Actions and Compliance 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 AD: Pratt & Whitney Canada: Docket No. FAA– 2008–0752; Directorate Identifier 2008– NE–22–AD. Comments Due Date (a) We must receive comments by September 22, 2008. yshivers on PROD1PC62 with PROPOSALS Applicability (c) This AD applies to the following Pratt & Whitney Canada (P&WC) turbofan engines with compressor air to HMU delivery tube, part number (P/N) 3119150–01 installed: (1) JT15D–5 turbofan engines, serial numbers (SNs) below and including SN PCE– 100411. (2) JT15D–5 turbofan engines, SNs below and including SN PCE–JA0818. (3) All JT15D–5B turbofan engines. (4) All JT15D–5F turbofan engines. (5) JT15D–5R turbofan engines SNs below and including SN PCE–JG0104. (6) All JT15D–5 turbofan engines converted to model JT15D–5R by incorporation of P&WC Service Bulletin No. 7605. These engines are installed on, but not limited to, Cessna models 500; 501; 550; 551; S550; 560; and 560 Ultra airplanes; Mitsubishi models 300 and 300–10 airplanes; and Hawker Beechcraft models 400; 400A; and 400T airplanes. Reason (d) Transport Canada AD CF–2008–23, dated June 27, 2008, states: There have been several reported incidents of high altitude, dual engine flameout on JT15D–5 engines powered aircraft operating in certain meteorological conditions. Subsequent to the investigation of incidents, review of the engine design has revealed that the Fuel Control Hydro Mechanical Unit (HMU) P3 servo can be exposed to excessive 15:15 Aug 21, 2008 Jkt 214001 (e) Unless already done, do the following actions. (1) Within 200 flight hours after the effective date of this AD or by December 31, 2008, whichever occurs first, remove from service compressor air to HMU delivery tube, P/N 3119150–01. (2) Install a serviceable compressor air to HMU delivery tube. (3) Tube installation in accordance with P&WC Alert Service Bulletin (ASB) No. JT15D–72–A7611, Revision 1, dated June 16, 2008, meets the requirements of this AD. Prohibition of Compressor Air to HMU Delivery Tube, P/N 3119150–01 Affected Airworthiness Directives (ADs) (b) None. VerDate Aug<31>2005 moisture and freezing. To preclude P3 servo freezing, P&WC has issued JT15D Alert Service Bulletin (ASB) JT15D–72–A7611 to re-route compressor delivery air to the HMU and improve moisture separation. Considering the potentially hazardous consequence of possible in-flight dual engine flameout, this airworthiness directive is issued to mandate the incorporation of P&WC ASB JT15D–72–A7611 to the affected JT15D– 5 engines, in order to minimize the possibility of this hazard. We are issuing this AD to prevent engine flameout, and possible dual-engine flameout events, caused by excessive moisture and freezing in the P3 servo, during certain flight conditions. (4) After the effective date of this AD, do not install any compressor air to HMU delivery tube, P/N 3119150–01, onto any engine. Definition (f) For the purpose of this AD, a serviceable compressor air to HMU delivery tube is a compressor air to HMU delivery tube that is other than the old/removed tube part number listed in this AD. (g) Alternative Methods of Compliance (AMOCs): The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Previous Credit (h) Replacement of the compressor air to HMU delivery tube using P&WC ASB No. JT15D–72–A7611, dated March 26, 2008, before the effective date of this AD, meets the requirements of this AD. Related Information (i) Refer to Transport Canada AD CF–2008– 23, dated June 27, 2008, for related information. (j) Contact Ian Dargin, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park; Burlington, MA 01803; email: ian.dargin@faa.gov; telephone (781) 238–7178; fax (781) 238–7199, for more information about this AD. PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 49621 Issued in Burlington, Massachusetts, on August 15, 2008. Robert G. Mann, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E8–19390 Filed 8–21–08; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF LABOR Wage and Hour Division 29 CFR Parts 4, 531, 553, 778, 779, 780, 785, 786, and 790 RIN 1215–AB13 Updating Regulations Issued Under the Fair Labor Standards Act Wage and Hour Division, Employment Standards Administration, Department of Labor. ACTION: Extension of comment period on proposed regulations. AGENCY: SUMMARY: This document extends the period for filing written comments for an additional 15 days on proposed revisions to regulations issued under the Fair Labor Standards Act of 1938 (FLSA) and the Portal-to-Portal Act of 1947 (Portal Act) that have become out of date because of subsequent legislation or court decisions. The Department of Labor is taking this action in order to provide interested parties additional time to submit comments. DATES: Comments must be received on or before September 26, 2008. ADDRESSES: You may submit comments, identified by RIN 1215–AB13, by either one of the following methods: • Electronic comments, through the federal eRulemaking Portal: https:// www.regulations.gov. Follow the instructions for submitting comments. • Mail: Wage and Hour Division, Employment Standards Administration, U.S. Department of Labor, Room S– 3502, 200 Constitution Avenue, NW., Washington, DC 20210. Instructions: Please submit one copy of your comments by only one method. All submissions received must include the agency name and Regulatory Information Number (RIN) identified above for this rulemaking. Comments received will be posted to https:// www.regulations.gov, including any personal information provided. Because we continue to experience delays in receiving mail in the Washington, DC, area, commenters are strongly encouraged to transmit their comments electronically via the federal eRulemaking Portal at https:// www.regulations.gov or to submit them E:\FR\FM\22AUP1.SGM 22AUP1

Agencies

[Federal Register Volume 73, Number 164 (Friday, August 22, 2008)]
[Proposed Rules]
[Pages 49619-49621]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E8-19390]


=======================================================================
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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0752; Directorate Identifier 2008-NE-22-AD]
RIN 2120-AA64


Airworthiness Directives; Pratt & Whitney Canada (P&WC) JT15D-5; 
-5B; -5F; and -5R Turbofan Engines

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 results from mandatory 
continuing airworthiness information (MCAI) issued 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 follows:

    There have been several reported incidents of high altitude, 
dual engine flameout on JT15D-5 engines powered aircraft operating 
in certain meteorological conditions. Subsequent to the 
investigation of incidents,

[[Page 49620]]

review of the engine design has revealed that the Fuel Control Hydro 
Mechanical Unit (HMU) P3 servo can be exposed to excessive moisture 
and freezing.

We are proposing this AD to prevent engine flameout, and possible dual-
engine flameout events, caused by excessive moisture and freezing in 
the P3 servo, during certain flight conditions.

DATES: We must receive comments on this proposed AD by September 22, 
2008.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to https://
www.regulations.gov and follow the instructions for sending your 
comments electronically.
     Mail: Docket Management Facility, U.S. Department of 
Transportation, 1200 New Jersey Avenue, SE., West Building Ground 
Floor, Room W12-140, Washington, DC 20590-0001.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
     Fax: (202) 493-2251.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://
www.regulations.gov; or in person at the Docket Operations office 
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 Operations office (telephone (800) 647-5527) is 
the same as the Mail address provided in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Ian Dargin, Aerospace Engineer, Engine 
Certification Office, FAA, Engine and Propeller Directorate, 12 New 
England Executive Park; Burlington, MA 01803; e-mail: 
ian.dargin@faa.gov; telephone (781) 238-7178; fax (781) 238-7199.

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-2008-0752; 
Directorate Identifier 2008-NE-22-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 based on those comments.
    We will post all comments we receive, without change, to https://
www.regulations.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 the Web site, anyone can find and read the comments in any 
of our dockets, including, if provided, 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 the DOT's complete Privacy 
Act Statement in the Federal Register published on April 11, 2000 (65 
FR 19477-78).

Discussion

    Transport Canada, which is the aviation authority for Canada, has 
issued Canadian AD CF-2008-23, dated June 27, 2008 (referred to after 
this as ``the MCAI''), to correct an unsafe condition for the specified 
products. The MCAI states the following:

    There have been several reported incidents of high altitude, 
dual engine flameout on JT15D-5 engine powered aircraft operating in 
certain meteorological conditions. Subsequent to the investigation 
of incidents, review of the engine design has revealed that the Fuel 
Control HMU P3 servo can be exposed to excessive moisture and 
freezing. To preclude P3 servo freezing, P&WC has issued JT15D ASB 
No. JT15D-72-A7611 to re-route compressor delivery air to the HMU 
and improve moisture separation.

You may obtain further information by examining the MCAI in the AD 
docket.

Relevant Service Information

    P&WC has issued ASB No. JT15D-72-A7611, Revision 1, dated June 16, 
2008. The actions described in this service information are intended to 
correct the unsafe condition identified in the MCAI.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of Canada, 
and is approved for operation in the United States. Pursuant to our 
bilateral agreement with Canada, they have notified us of the unsafe 
condition described in the MCAI and service information referenced 
above. We are proposing this AD because we evaluated all the 
information provided by Canada and determined the unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design. This proposed AD requires replacing the compressor air to 
HMU delivery tube with a new, re-routed tube. The new tube provides 
warmer and dryer P3 air, improves moisture separation, and directs the 
moisture away from the HMU through a drain hole.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 1,500 products of U.S. registry. We also estimate 
that it would take about 3 work-hours per product to comply with this 
proposed AD. The average labor rate is $80 per work-hour. Required 
parts would cost about $1,981 per product for JT15D-5 and -5R engines, 
and $3,169 per product for JT15D-5B and -5R engines. Based on these 
figures, we estimate the cost of the proposed AD on U.S. operators to 
be $4,222,500. Our cost estimate is exclusive of possible warranty 
coverage.

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); and
    3. Will not have a significant economic impact, positive or 
negative,

[[Page 49621]]

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 and placed it in the AD docket.

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 AD:

Pratt & Whitney Canada: Docket No. FAA-2008-0752; Directorate 
Identifier 2008-NE-22-AD.

Comments Due Date

    (a) We must receive comments by September 22, 2008.

Affected Airworthiness Directives (ADs)

    (b) None.

Applicability

    (c) This AD applies to the following Pratt & Whitney Canada 
(P&WC) turbofan engines with compressor air to HMU delivery tube, 
part number (P/N) 3119150-01 installed:
    (1) JT15D-5 turbofan engines, serial numbers (SNs) below and 
including SN PCE-100411.
    (2) JT15D-5 turbofan engines, SNs below and including SN PCE-
JA0818.
    (3) All JT15D-5B turbofan engines.
    (4) All JT15D-5F turbofan engines.
    (5) JT15D-5R turbofan engines SNs below and including SN PCE-
JG0104.
    (6) All JT15D-5 turbofan engines converted to model JT15D-5R by 
incorporation of P&WC Service Bulletin No. 7605.
    These engines are installed on, but not limited to, Cessna 
models 500; 501; 550; 551; S550; 560; and 560 Ultra airplanes; 
Mitsubishi models 300 and 300-10 airplanes; and Hawker Beechcraft 
models 400; 400A; and 400T airplanes.

Reason

    (d) Transport Canada AD CF-2008-23, dated June 27, 2008, states:

    There have been several reported incidents of high altitude, 
dual engine flameout on JT15D-5 engines powered aircraft operating 
in certain meteorological conditions. Subsequent to the 
investigation of incidents, review of the engine design has revealed 
that the Fuel Control Hydro Mechanical Unit (HMU) P3 servo can be 
exposed to excessive moisture and freezing. To preclude P3 servo 
freezing, P&WC has issued JT15D Alert Service Bulletin (ASB) JT15D-
72-A7611 to re-route compressor delivery air to the HMU and improve 
moisture separation. Considering the potentially hazardous 
consequence of possible in-flight dual engine flameout, this 
airworthiness directive is issued to mandate the incorporation of 
P&WC ASB JT15D-72-A7611 to the affected JT15D-5 engines, in order to 
minimize the possibility of this hazard.

    We are issuing this AD to prevent engine flameout, and possible 
dual-engine flameout events, caused by excessive moisture and 
freezing in the P3 servo, during certain flight conditions.

Actions and Compliance

    (e) Unless already done, do the following actions.
    (1) Within 200 flight hours after the effective date of this AD 
or by December 31, 2008, whichever occurs first, remove from service 
compressor air to HMU delivery tube, P/N 3119150-01.
    (2) Install a serviceable compressor air to HMU delivery tube.
    (3) Tube installation in accordance with P&WC Alert Service 
Bulletin (ASB) No. JT15D-72-A7611, Revision 1, dated June 16, 2008, 
meets the requirements of this AD.

Prohibition of Compressor Air to HMU Delivery Tube, P/N 3119150-01

    (4) After the effective date of this AD, do not install any 
compressor air to HMU delivery tube, P/N 3119150-01, onto any 
engine.

Definition

    (f) For the purpose of this AD, a serviceable compressor air to 
HMU delivery tube is a compressor air to HMU delivery tube that is 
other than the old/removed tube part number listed in this AD.
    (g) Alternative Methods of Compliance (AMOCs): The Manager, 
Engine Certification Office, FAA, has the authority to approve AMOCs 
for this AD, if requested using the procedures found in 14 CFR 
39.19.

Previous Credit

    (h) Replacement of the compressor air to HMU delivery tube using 
P&WC ASB No. JT15D-72-A7611, dated March 26, 2008, before the 
effective date of this AD, meets the requirements of this AD.

Related Information

    (i) Refer to Transport Canada AD CF-2008-23, dated June 27, 
2008, for related information.
    (j) Contact Ian Dargin, Aerospace Engineer, Engine Certification 
Office, FAA, Engine and Propeller Directorate, 12 New England 
Executive Park; Burlington, MA 01803; e-mail: ian.dargin@faa.gov; 
telephone (781) 238-7178; fax (781) 238-7199, for more information 
about this AD.

    Issued in Burlington, Massachusetts, on August 15, 2008.
Robert G. Mann,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
 [FR Doc. E8-19390 Filed 8-21-08; 8:45 am]
BILLING CODE 4910-13-P
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