Airworthiness Directives; Honeywell International Inc. ATF3-6 and ATF3-6A Series Turbofan Engines, 56945-56947 [E7-19684]

Download as PDF 56945 Proposed Rules Federal Register Vol. 72, No. 193 Friday, October 5, 2007 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 Grain Inspection, Packers and Stockyards Administration 7 CFR Chapter VIII RIN 0580–AB00 The Role of USDA in Differentiating Grain Inputs for Ethanol Production and Standardizing Testing of the CoProducts of Ethanol Production Grain Inspection, Packers and Stockyards Administration, USDA. ACTION: Notice of reopening and extension of comment period. yshivers on PROD1PC62 with PROPOSALS AGENCY: SUMMARY: We published an advance notice of proposed rulemaking in the Federal Register on July 20, 2007 (72 FR 39762), inviting comments from producers, handlers, processors, livestock feeders, industry representatives, and other interested persons on the appropriate government role with regard to differentiating grain attributes for ethanol production, as well as standardizing the testing of coproducts of ethanol production, commonly referred to as distillers grains. The notice provided an opportunity for interested parties to forward written comments to the Grain Inspection, Packers and Stockyards Administration until September 18, 2007. As a result of a request from the grain industry, we are reopening the comment period to provide interested parties with additional time in which to comment. DATES: We will consider comments that we receive by December 4, 2007. ADDRESSES: We invite you to submit comments on this advance notice of proposed rulemaking. You may submit comments by any of the following methods: • E-Mail: Send comments via electronic mail to comments.gipsa@usda.gov. • Mail: Send hardcopy written comments to Tess Butler, GIPSA, USDA, VerDate Aug<31>2005 15:24 Oct 04, 2007 Jkt 214001 1400 Independence Avenue, SW., Room 1633–S, Washington, DC 20250–3604. • Fax: Send comments by facsimile transmission to: (202) 690–2173. • Hand Delivery or Courier: Deliver comments to: Tess Butler, GIPSA, USDA, 1400 Independence Avenue, SW., Room 1647–S, Washington, DC 20250–3604. • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the online instructions for submitting comments. • Instructions: All comments should make reference to the date and page number of this issue of the Federal Register. • Read Comments: All comments will be available for public inspection in the above office during regular business hours (7 CFR 1.27(b)) and at regulations.gov. Eric Jabs at GIPSA, USDA, 6501 Beacon Drive, Suite 180 Stop 1404, Kansas City, MO 64133; Telephone (816) 823–4635; Fax Number (816) 823–4644; e-mail Eric.J.Jabs@usda.gov. FOR FURTHER INFORMATION CONTACT: GIPSA published an advance notice of proposed rulemaking in the Federal Register on July 20, 2007 (72 FR 39762), inviting comments from all interested persons on the appropriate government role with regard to differentiating grain attributes for ethanol production, as well as standardizing the testing of coproducts of ethanol production, commonly referred to as distillers grains. Our intent is to determine the appropriate government role in facilitating the marketing of distillers grains in today’s evolving marketplace. The comment period of 60 days from the date of publication (72 FR 39762) closed on September 18, 2007. GIPSA received a request from the grain industry to provide interested parties additional time to comment. As a result, the comment period is reopened for a 60 day period. SUPPLEMENTARY INFORMATION: Authority: 7 U.S.C. 71–87. James E. Link, Administrator, Grain Inspection, Packers and Stockyards Administration. [FR Doc. E7–19733 Filed 10–4–07; 8:45 am] BILLING CODE 3410–KD–P PO 00000 Frm 00001 Fmt 4702 Sfmt 4702 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–29092; Directorate Identifier 2007–NE–30–AD] RIN 2120–AA64 Airworthiness Directives; Honeywell International Inc. ATF3–6 and ATF3–6A Series Turbofan Engines Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for Honeywell International Inc. ATF3–6 and ATF3–6A series turbofan engines equipped with a certain part number (P/ N) low pressure compressor (LPC) aft shaft. This proposed AD would require removing from service those LPC aft shafts and installing a serviceable LPC aft shaft. This proposed AD results from reports of eight LPC aft shafts found cracked during fluorescent penetrant inspection (FPI). We are proposing this AD to prevent uncoupling and overspeed of the low pressure turbine, which could result in uncontained engine failure and damage to the airplane. We must receive any comments on this proposed AD by December 4, 2007. DATES: Use one of the following addresses to comment on this proposed AD. • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the online 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. You can get the service information identified in this proposed AD from Honeywell International Inc., 111 S. 34th St., Phoenix, AZ 85034–2802; Web ADDRESSES: E:\FR\FM\05OCP1.SGM 05OCP1 56946 Federal Register / Vol. 72, No. 193 / Friday, October 5, 2007 / Proposed Rules site: https://portal.honeywell.com/wps/ portal/aero; telephone (800) 601–3099. FOR FURTHER INFORMATION CONTACT: Joseph Costa, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3960 Paramount Blvd., Lakewood, CA 90712–4137; e-mail: joseph.costa@faa.gov; telephone: (562) 627–5246; fax: (562) 627–5210. SUPPLEMENTARY INFORMATION: shafts were found to have fillet root radii of the curvic teeth below the manufacturing minimum limit. We have determined that curvic teeth machined to a small root radii increases local stresses and contributes to cracking. This condition, if not corrected, could result in uncoupling and overspeed of the low pressure turbine, uncontained engine failure, and damage to the airplane. Comments Invited We invite you to send us any written relevant data, views, or arguments regarding this proposal. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA– 2007–29092; Directorate Identifier 2007–NE–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 received 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:// 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. Anyone is able to search the electronic form of all comments received into any of our dockets by the name of the individual submitting the comment (or signing the comment, if submitted 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). Relevant Service Information 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. Discussion During routine fluorescent penetrant inspection of P/N 3002070–1 LPC aft shafts, eight LPC aft shafts were found with cracks in the root radii of the curvic teeth. Five of eight cracked aft VerDate Aug<31>2005 15:24 Oct 04, 2007 Jkt 214001 We have reviewed and approved the technical contents of Honeywell International Inc. Service Bulletin (SB) No. ATF3–72–6240, Revision 1, dated May 14, 2007, that describes procedures for removing P/N 3002070–1 LPC aft shafts from service and installing a serviceable LPC aft shaft. Differences Between the Proposed AD and the Manufacturer’s Service Information The compliance schedule in this proposed AD differs from the SB compliance schedule by improving format, by removing the hourly and calendar ‘‘at access’’ compliance time requirements, and by relaxing the compliance schedule. 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 products of this same type design. We are proposing this AD, which would require removing LPC aft shafts, P/N 3002070–1 from service and installing a serviceable LPC aft shaft. The proposed AD would require you to use the service information described previously to perform these actions. Costs of Compliance We estimate that this proposed AD would affect 32 ATF3–6 and ATF3–6A series turbofan engines installed on airplanes of U.S. registry. We also estimate that it would take about 40 work-hours per engine to perform the proposed actions if unscheduled, 20 work-hours per engine if during scheduled major periodic inspection (MPI), and 1 work-hour per engine during scheduled core zone inspection (CZI). We estimate that 4 engines would be unscheduled, 14 engines would be scheduled at MPI, and 14 engines would be scheduled at CZI. The average labor rate is $80 per work-hour. Required parts would cost about $15,000 per engine. Based on these figures, we estimate the total cost of the proposed AD to U.S. operators to be $516,320. PO 00000 Frm 00002 Fmt 4702 Sfmt 4702 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 have 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 that the proposed AD: 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. Would 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. You may get a copy of this summary at the address listed under ADDRESSES. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. The Proposed Amendment Under the authority delegated to me by the Administrator, the Federal Aviation Administration 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: E:\FR\FM\05OCP1.SGM 05OCP1 Federal Register / Vol. 72, No. 193 / Friday, October 5, 2007 / Proposed Rules 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: Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett Turbine Engine Co.): Docket No. FAA–2007– 29092; Directorate Identifier 2007–NE– 30–AD. Comments Due Date (a) The Federal Aviation Administration (FAA) must receive comments on this airworthiness directive (AD) action by December 4, 2007. Affected ADs (b) None. Applicability (c) This AD applies to Honeywell International Inc. ATF3–6–4C, ATF3–6A–3C, and ATF3–6A–4C turbofan engines equipped with part number (P/N) 3002070–1 low pressure compressor (LPC) aft shaft. These engines are installed on, but not limited to, Dassault Aviation Fan Jet Falcon Series G (Falcon 20G/HU25), and Dassault Aviation Mystere-Falcon 200 airplanes. 56947 Unsafe Condition (d) This AD results from reports of eight LPC aft shafts found cracked during fluorescent penetrant inspection (FPI). We are issuing this AD to prevent uncoupling and overspeed of the low pressure turbine, which could result in uncontained engine failure and damage to the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified in Table 1 and Table 2 of this AD, unless the actions have already been done. TABLE 1.—ATF3–6A–4C TURBOFAN ENGINES, LPC AFT SHAFT REPLACEMENT COMPLIANCE SCHEDULE For ATF3–6A–4C turbofan engines, if the cycles-since-new (CSN) on the effective date of this AD are: Then replace the LPC aft shaft: (1) (2) (3) (4) Within Within Within Within 6,500 or more CSN .............................. 5,000 to 6,499 CSN ............................. 4,000 to 4,999 CSN ............................. Fewer than 4,000 CSN ........................ an an an an additional additional additional additional 100 cycles-in-service (CIS). 800 CIS, but not more than 6,600 CSN, whichever occurs first. 1,500 CIS, but not more than 5,800 CSN, whichever occurs first. 2,000 CIS, but not more than 5,500 CSN, whichever occurs first. TABLE 2.—ATF3–6–4C AND ATF3–6A–3C TURBOFAN ENGINES, LPC AFT SHAFT REPLACEMENT COMPLIANCE SCHEDULE For ATF3–6–4C and ATF3–6A–3C turbofan engines, if the CSN on the effective date of this AD are: Then replace the LPC aft shaft: (1) (2) (3) (4) Within Within Within Within 4,400 or more CSN .............................. 3,600 to 4,399 CSN ............................. 3,300 to 3,599 CSN ............................. Fewer than 3,300 CSN ........................ LPC Aft Shaft Replacement (f) Using the compliance schedule in Table 1 or Table 2 of this AD as applicable, remove the LPC aft shaft P/N 3002070–1, from service, and install a serviceable LPC aft shaft. an an an an additional additional additional additional 100 CIS. 500 CIS, but not more than 4,500 CSN, whichever occurs first. 700 CIS, but not more than 4,100 CSN, whichever occurs first. 1,000 CIS, but not more than 4,000 CSN, whichever occurs first. Issued in Burlington, Massachusetts, on October 1, 2007. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E7–19684 Filed 10–4–07; 8:45 am] BILLING CODE 4910–13–P Definition (g) For the purpose of this AD, a serviceable LPC aft shaft is an aft shaft with a P/N not referenced in this AD. Alternative Methods of Compliance DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 91 Related Information yshivers on PROD1PC62 with PROPOSALS (h) The Manager, Los Angeles Aircraft Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Automatic Dependent Surveillance— Broadcast (ADS–B) Out Performance Requirements To Support Air Traffic Control (ATC) Service (i) Honeywell International Inc. Service Bulletin No. ATF3–72–6240, Revision 1, dated May 14, 2007, pertains to the subject of this AD. (j) Contact Joseph Costa, Aerospace Engineer, Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3960 Paramount Blvd., Lakewood, CA 90712–4137; e-mail: joseph.costa@faa.gov; telephone: (562) 627–5246; fax: (562) 627– 5210. VerDate Aug<31>2005 15:24 Oct 04, 2007 Jkt 214001 [Docket No. FAA–2007–29305; Notice No. 07–15] RIN 2120–AI92 Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: This notice proposes performance requirements for certain avionics equipment on aircraft operating PO 00000 Frm 00003 Fmt 4702 Sfmt 4702 in specified classes of airspace within the United States National Airspace System. The proposed rule would facilitate the use of Automatic Dependent Surveillance-Broadcast (ADS–B) for aircraft surveillance by Federal Aviation Administration and Department of Defense air traffic controllers to accommodate the expected increase in demand for air transportation. In addition to accommodating the anticipated increase in operations, this proposal, if adopted, would provide aircraft operators with a platform for additional flight applications and services. DATES: Send your comments on or before January 3, 2008. ADDRESSES: You may send comments identified by Docket Number FAA– 2007–29305 using any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov and follow the online instructions for sending your comments electronically. • Mail: Send comments to the Docket Management Facility; U.S. Department of Transportation, 1200 New Jersey Avenue, SE., West Building Ground E:\FR\FM\05OCP1.SGM 05OCP1

Agencies

[Federal Register Volume 72, Number 193 (Friday, October 5, 2007)]
[Proposed Rules]
[Pages 56945-56947]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-19684]


=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-29092; Directorate Identifier 2007-NE-30-AD]
RIN 2120-AA64


Airworthiness Directives; Honeywell International Inc. ATF3-6 and 
ATF3-6A Series Turbofan Engines

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for Honeywell International Inc. ATF3-6 and ATF3-6A series turbofan 
engines equipped with a certain part number (P/N) low pressure 
compressor (LPC) aft shaft. This proposed AD would require removing 
from service those LPC aft shafts and installing a serviceable LPC aft 
shaft. This proposed AD results from reports of eight LPC aft shafts 
found cracked during fluorescent penetrant inspection (FPI). We are 
proposing this AD to prevent uncoupling and overspeed of the low 
pressure turbine, which could result in uncontained engine failure and 
damage to the airplane.

DATES: We must receive any comments on this proposed AD by December 4, 
2007.

ADDRESSES: Use one of the following addresses to comment on this 
proposed AD.
     Federal eRulemaking Portal: Go to https://
www.regulations.gov. Follow the online 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.
    You can get the service information identified in this proposed AD 
from Honeywell International Inc., 111 S. 34th St., Phoenix, AZ 85034-
2802; Web

[[Page 56946]]

site: https://portal.honeywell.com/wps/portal/aero; telephone (800) 601-
3099.

FOR FURTHER INFORMATION CONTACT: Joseph Costa, Aerospace Engineer, Los 
Angeles Aircraft Certification Office, FAA, Transport Airplane 
Directorate, 3960 Paramount Blvd., Lakewood, CA 90712-4137; e-mail: 
joseph.costa@faa.gov; telephone: (562) 627-5246; fax: (562) 627-5210.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send us any written relevant data, views, or 
arguments regarding this proposal. Send your comments to an address 
listed under ADDRESSES. Include ``Docket No. FAA-2007-29092; 
Directorate Identifier 2007-NE-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 received 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://
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. Anyone is able to 
search the electronic form of all comments received into any of our 
dockets by the name of the individual submitting the comment (or 
signing the comment, if submitted 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).

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.

Discussion

    During routine fluorescent penetrant inspection of P/N 3002070-1 
LPC aft shafts, eight LPC aft shafts were found with cracks in the root 
radii of the curvic teeth. Five of eight cracked aft shafts were found 
to have fillet root radii of the curvic teeth below the manufacturing 
minimum limit. We have determined that curvic teeth machined to a small 
root radii increases local stresses and contributes to cracking. This 
condition, if not corrected, could result in uncoupling and overspeed 
of the low pressure turbine, uncontained engine failure, and damage to 
the airplane.

Relevant Service Information

    We have reviewed and approved the technical contents of Honeywell 
International Inc. Service Bulletin (SB) No. ATF3-72-6240, Revision 1, 
dated May 14, 2007, that describes procedures for removing P/N 3002070-
1 LPC aft shafts from service and installing a serviceable LPC aft 
shaft.

Differences Between the Proposed AD and the Manufacturer's Service 
Information

    The compliance schedule in this proposed AD differs from the SB 
compliance schedule by improving format, by removing the hourly and 
calendar ``at access'' compliance time requirements, and by relaxing 
the compliance schedule.

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 products 
of this same type design. We are proposing this AD, which would require 
removing LPC aft shafts, P/N 3002070-1 from service and installing a 
serviceable LPC aft shaft. The proposed AD would require you to use the 
service information described previously to perform these actions.

Costs of Compliance

    We estimate that this proposed AD would affect 32 ATF3-6 and ATF3-
6A series turbofan engines installed on airplanes of U.S. registry. We 
also estimate that it would take about 40 work-hours per engine to 
perform the proposed actions if unscheduled, 20 work-hours per engine 
if during scheduled major periodic inspection (MPI), and 1 work-hour 
per engine during scheduled core zone inspection (CZI). We estimate 
that 4 engines would be unscheduled, 14 engines would be scheduled at 
MPI, and 14 engines would be scheduled at CZI. The average labor rate 
is $80 per work-hour. Required parts would cost about $15,000 per 
engine. Based on these figures, we estimate the total cost of the 
proposed AD to U.S. operators to be $516,320.

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 have 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 that the proposed AD:
    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. Would 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. You may get a copy of this summary at the 
address listed under ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Under the authority delegated to me by the Administrator, the 
Federal Aviation Administration 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:


[[Page 56947]]


    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:
Honeywell International Inc. (formerly AlliedSignal Inc. and Garrett 
Turbine Engine Co.): Docket No. FAA-2007-29092; Directorate 
Identifier 2007-NE-30-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this airworthiness directive (AD) action by December 4, 
2007.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Honeywell International Inc. ATF3-6-4C, 
ATF3-6A-3C, and ATF3-6A-4C turbofan engines equipped with part 
number (P/N) 3002070-1 low pressure compressor (LPC) aft shaft. 
These engines are installed on, but not limited to, Dassault 
Aviation Fan Jet Falcon Series G (Falcon 20G/HU25), and Dassault 
Aviation Mystere-Falcon 200 airplanes.

Unsafe Condition

    (d) This AD results from reports of eight LPC aft shafts found 
cracked during fluorescent penetrant inspection (FPI). We are 
issuing this AD to prevent uncoupling and overspeed of the low 
pressure turbine, which could result in uncontained engine failure 
and damage to the airplane.

Compliance

    (e) You are responsible for having the actions required by this 
AD performed within the compliance times specified in Table 1 and 
Table 2 of this AD, unless the actions have already been done.

              Table 1.--ATF3-6A-4C Turbofan Engines, LPC Aft Shaft Replacement Compliance Schedule
----------------------------------------------------------------------------------------------------------------
For ATF3-6A-4C turbofan engines, if the cycles-since-new (CSN) on
                the effective date of this AD are:                        Then replace the LPC aft shaft:
----------------------------------------------------------------------------------------------------------------
(1) 6,500 or more CSN............................................  Within an additional 100 cycles-in-service
                                                                    (CIS).
(2) 5,000 to 6,499 CSN...........................................  Within an additional 800 CIS, but not more
                                                                    than 6,600 CSN, whichever occurs first.
(3) 4,000 to 4,999 CSN...........................................  Within an additional 1,500 CIS, but not more
                                                                    than 5,800 CSN, whichever occurs first.
(4) Fewer than 4,000 CSN.........................................  Within an additional 2,000 CIS, but not more
                                                                    than 5,500 CSN, whichever occurs first.
----------------------------------------------------------------------------------------------------------------


       Table 2.--ATF3-6-4C and ATF3-6A-3C Turbofan Engines, LPC Aft Shaft Replacement Compliance Schedule
----------------------------------------------------------------------------------------------------------------
 For ATF3-6-4C and ATF3-6A-3C turbofan engines, if the CSN on the
                  effective date of this AD are:                          Then replace the LPC aft shaft:
----------------------------------------------------------------------------------------------------------------
(1) 4,400 or more CSN............................................  Within an additional 100 CIS.
(2) 3,600 to 4,399 CSN...........................................  Within an additional 500 CIS, but not more
                                                                    than 4,500 CSN, whichever occurs first.
(3) 3,300 to 3,599 CSN...........................................  Within an additional 700 CIS, but not more
                                                                    than 4,100 CSN, whichever occurs first.
(4) Fewer than 3,300 CSN.........................................  Within an additional 1,000 CIS, but not more
                                                                    than 4,000 CSN, whichever occurs first.
----------------------------------------------------------------------------------------------------------------

LPC Aft Shaft Replacement

    (f) Using the compliance schedule in Table 1 or Table 2 of this 
AD as applicable, remove the LPC aft shaft P/N 3002070-1, from 
service, and install a serviceable LPC aft shaft.

Definition

    (g) For the purpose of this AD, a serviceable LPC aft shaft is 
an aft shaft with a P/N not referenced in this AD.

Alternative Methods of Compliance

    (h) The Manager, Los Angeles Aircraft Certification Office, has 
the authority to approve alternative methods of compliance for this 
AD if requested using the procedures found in 14 CFR 39.19.

Related Information

    (i) Honeywell International Inc. Service Bulletin No. ATF3-72-
6240, Revision 1, dated May 14, 2007, pertains to the subject of 
this AD.
    (j) Contact Joseph Costa, Aerospace Engineer, Los Angeles 
Aircraft Certification Office, FAA, Transport Airplane Directorate, 
3960 Paramount Blvd., Lakewood, CA 90712-4137; e-mail: 
joseph.costa@faa.gov; telephone: (562) 627-5246; fax: (562) 627-
5210.

    Issued in Burlington, Massachusetts, on October 1, 2007.
Peter A. White,
Acting Manager, Engine and Propeller Directorate, Aircraft 
Certification Service.
[FR Doc. E7-19684 Filed 10-4-07; 8:45 am]
BILLING CODE 4910-13-P
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