Airworthiness Directives; Learjet Model 60 Airplanes, 25682-25684 [E9-12522]

Download as PDF 25682 Federal Register / Vol. 74, No. 102 / Friday, May 29, 2009 / Proposed Rules imported in containers with a net weight of 3 pounds or less, if the potatoes are otherwise U.S. No. 1 grade or better. 5. Section 980.117 is amended as follows: a. Paragraph (e) is revised; b. In paragraph (f)(2), remove the reference ‘‘(7 CFR 2851)’’ and add in its place the reference ‘‘(7 CFR part 51).’’ c. In paragraph (h), remove the references ‘‘(7 CFR 2851.3195 through 2851.3209),’’ ‘‘(7 CFR 2851.3955 through 2851.3970),’’ and ‘‘(7 CFR 2851.3195 through 2851.3209)’’ and add in their places the references ‘‘(7 CFR 51.3195 through 51.3209),’’ ‘‘(7 CFR 51.3955 through 51.3970),’’ and ‘‘(7 CFR 51.3195 through 51.3209),’’ respectively. § 980.117 Import regulations; onions. * * * * * (e) Designation of governmental inspection service. The Federal or Federal-State Inspection Service, Fruit and Vegetable Programs, Agricultural Marketing Service, U.S. Department of Agriculture and the Food of Plant Origin Division, Plant Products Directorate, Canadian Food Inspection Agency, are hereby designated as governmental inspection services for the purpose of certifying the grade, size, quality, and maturity of onions that are imported, or to be imported, into the United States under the provisions of section 8e of the Act. * * * * * 8. In § 980.212: a. Paragraph (e) is revised; b. In paragraph (f)(2), remove the reference ‘‘(7 CFR 2851)’’ and add in its place the reference ‘‘(7 CFR part 51).’’ c. In paragraph (h), remove the words ‘‘(7 CFR 2851.1855 through 2851.1877; title 7, chapter I, part 51 was redesignated title 7, chapter 28, part 2851 on June 27, 1977)’’ and add in their place the words ‘‘(7 CFR 51.1855 through 51.1877).’’ § 980.212 Import regulations; tomatoes. mstockstill on PROD1PC66 with PROPOSALS * * * * * (e) Designation of governmental inspection service. The Federal or Federal-State Inspection Service, Fruit and Vegetable Programs, Agricultural Marketing Service, U.S. Department of Agriculture and the Food of Plant Origin Division, Plant Products Directorate, Canadian Food Inspection Agency, are hereby designated as governmental inspection services for the purpose of certifying the grade, size, quality, and maturity of tomatoes that are imported, or to be imported, into the United States under the provisions of section 8e of the Act. * * * * * VerDate Nov<24>2008 16:27 May 28, 2009 Jkt 217001 DEPARTMENT OF TRANSPORTATION • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Learjet, Inc., One Learjet Way, Wichita, Kansas 67209–2942; telephone 316–946–2000; fax 316–946–2220; e-mail ac.ict@aero.bombardier.com; Internet https://www.bombardier.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221 or 425–227–1152. Federal Aviation Administration Examining the AD Docket § 980.501 [Amended] 9. Amend § 980.501 in paragraph (a)(4) by removing the words ‘‘Fruit and Vegetable Division’’ in the first and second sentences and adding in their places the words ‘‘Fruit and Vegetable Programs.’’; and in paragraph (d), remove the address ‘‘Marketing Order Administration Branch, USDA, AMS, P.O. Box 96456, room 2523–S, Washington, DC 20090–6456, telephone (202) 720–4607’’ and add in its place the address ‘‘Marketing Order Administration Branch, Fruit and Vegetable Programs, AMS, USDA, 1400 Independence Avenue, SW., STOP 0237, Washington, DC 20250–0237, telephone (202) 720–2491.’’ Dated: May 20, 2009. Robert C. Keeney, Acting Associate Administrator. [FR Doc. E9–12186 Filed 5–28–09; 8:45 am] BILLING CODE P 14 CFR Part 39 [Docket No. FAA–2009–0495; Directorate Identifier 2009–NM–049–AD] RIN 2120–AA64 Airworthiness Directives; Learjet Model 60 Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Learjet Model 60 airplanes. This proposed AD would require revising the Tire-Servicing section of the airplane maintenance manual and revising the Tires Limitation section of the airplane flight manual to incorporate revised procedures for servicing tires and checking for proper tire inflation. This proposed AD results from a report of the main landing gear tires blowing out during a takeoff roll. We are proposing this AD to prevent tire failure, which could result in failures of the braking and thrust reverser systems. In a critical phase of operation such as takeoff, loss of airplane control may result. DATES: We must receive comments on this proposed AD by July 13, 2009. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 You may examine the AD docket on the Internet at https:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (telephone 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Don Ristow, Aerospace Engineer, Mechanical Systems and Propulsion Branch, ACE–116W, FAA, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 946–4120; fax (316) 946–4107. 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–2009–0495; Directorate Identifier 2009–NM–049–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 E:\FR\FM\29MYP1.SGM 29MYP1 Federal Register / Vol. 74, No. 102 / Friday, May 29, 2009 / Proposed Rules proposed AD because 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 we receive about this proposed AD. Discussion We received a report of all four of the main landing gear tires blowing out during a takeoff roll of a Learjet Model 60 airplane. The airplane overran the end of the runway, ultimately stopping when it struck an embankment, and was destroyed by fire. Investigation of the tire fragments indicates that, in all four tires, there was evidence of internal heat damage consistent with under-inflation, over-loading, or a combination of both; damage to a tire under these conditions is cumulative. Tires that have been rolled or taxied at lower-than-specified tire pressure settings may fail. We are proposing this AD to prevent tire failure, which could result in failures of the braking and thrust reverser systems. In a critical phase of operation such as takeoff, loss of airplane control may result. Relevant Service Information We have reviewed Learjet 60 Temporary Revision (TR) 12–16, dated March 18, 2009, to the Learjet 60 Maintenance Manual; and Learjet 60 Temporary Flight Manual Change (TFMC) 2009–03, dated March 9, 2009, to the Learjet 60 Airplane Flight Manual (AFM) and Learjet 60XR AFM. Learjet 60 TR 12–16 describes the procedures to use when checking for and maintaining proper tire inflation. Learjet 60 TFMC 2009–03 describes procedures to use when checking for proper tire inflation within 96 hours (4 days) prior to takeoff. mstockstill on PROD1PC66 with PROPOSALS FAA’s Determination and Requirements of This Proposed AD We are proposing this AD because we evaluated all relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the(se) same type design(s). This proposed AD would require accomplishing the actions specified in the service information described previously. Costs of Compliance We estimate that this proposed AD would affect 240 airplanes of U.S. registry. We also estimate that it would take about 1 work-hour per product to comply with this proposed AD. The average labor rate is $80 per work-hour. Based on these figures, we estimate the VerDate Nov<24>2008 16:27 May 28, 2009 Jkt 217001 cost of this proposed AD to the U.S. operators to be $19,200, or $80 per product. 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, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. You can find our regulatory evaluation and the estimated costs of compliance in the AD Docket. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, 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: PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 25683 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: Learjet: Docket No. FAA–2009–0495; Directorate Identifier 2009–NM–049–AD. Comments Due Date (a) We must receive comments by July 13, 2009. Affected ADs (b) None. Applicability (c) This AD applies to Learjet Model 60 airplanes, certificated in any category, serial numbers 60–002 through 60–369 inclusive. Subject (d) Air Transport Association (ATA) of America Code 32: Landing gear. Unsafe Condition (e) This AD results from a report of the main landing gear tires blowing out during a takeoff roll. The Federal Aviation Administration is issuing this AD to prevent tire failure, which could result in failures of the braking and thrust reverser systems. In a critical phase of operation such as takeoff, loss of airplane control may result. Compliance (f) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Revise the Maintenance Manual (MM) (g) Within 14 days after the effective date of this AD, revise the Tire-Servicing section of Learjet 60 MM to include the information in Learjet 60 Temporary Revision (TR) 12–16, dated March 18, 2009. Note 1: The actions required by paragraph (g) of this AD may be done by inserting a copy of Learjet 60 TR 12–16, dated March 18, 2009, into the Learjet 60 MM. When Learjet 60 TR 12–16 has been included in general revisions of the Learjet 60 MM, the general revisions may be inserted in the MM, provided the relevant information in the general revision is identical to that in the TR. Revise the Airplane Flight Manual (AFM) (h) Within 14 days after the effective date of this AD, revise the Tires Limitations section of the Learjet 60 AFM or Learjet 60XR AFM, as applicable, to include the information in the Learjet 60 Temporary Flight Manual Change (TFMC) 2009–03, dated March 9, 2009. Thereafter, operate the airplane according to the limitations and procedures in the TFMC. Note 2: The actions required by paragraph (h) of this AD may be done by inserting a copy of Learjet 60 TFMC 2009–03, dated March 9, 2009, into the Learjet 60 or 60XR E:\FR\FM\29MYP1.SGM 29MYP1 25684 Federal Register / Vol. 74, No. 102 / Friday, May 29, 2009 / Proposed Rules AFM, as applicable. When Learjet 60 TFMC 2009–03 has been included in general revisions of the applicable AFM, the general revisions may be inserted in the applicable AFM, provided the relevant information in the general revision is identical to that in Learjet 60 TFMC 2009–03. Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, Wichita Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Don Ristow, Aerospace Engineer, Mechanical Systems and Propulsion Branch, ACE–116W, Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 946–4120; fax (316) 946–4107. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. Issued in Renton, Washington, on May 18, 2009. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E9–12522 Filed 5–28–09; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2009–0489; Directorate Identifier 2009–CE–025–AD] Airworthiness Directives; Air Tractor, Inc. Models AT–802 and AT–802A Airplanes mstockstill on PROD1PC66 with PROPOSALS AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Air Tractor, Inc. (Air Tractor) Models AT–802 and AT–802A airplanes. This proposed AD would require installing a rudder-aileron interconnect cable system shield kit and securing any items stowed in the baggage compartment using tie downs and/or a cargo net until the cable shield kit is installed. This proposed AD results from a report of the 16:27 May 28, 2009 Jkt 217001 FOR FURTHER INFORMATION CONTACT: Andy McAnaul, Aerospace Engineer, 10100 Reunion Pl., Ste. 650, San Antonio, Texas 78216; telephone: (210) 308–3365; fax: (210) 308–3370. SUPPLEMENTARY INFORMATION: Comments Invited RIN 2120–AA64 VerDate Nov<24>2008 rudder pedal cable becoming jammed in flight. We are proposing this AD to prevent jamming of the rudder-aileron interconnect cables by unsecured items in the baggage compartment, which could result in failure of the rudderaileron interconnect cable system. This failure could lead to loss of control. DATES: We must receive comments on this proposed AD by July 28, 2009. ADDRESSES: Use one of the following addresses to comment on this proposed AD: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Air Tractor, Inc., P.O. Box 485, Olney, Texas 76374; telephone: (940) 564–5616; facsimile: (940) 564–5612; E-mail: parts@airtractor.com; Internet: https:// www.airtractor.com. We invite you to send any written relevant data, views, or arguments regarding this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include the docket number, ‘‘FAA–2009–0489; Directorate Identifier 2009–CE–025–AD’’ at the beginning 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 we receive concerning this proposed AD. PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 Discussion We received a report of an Air Tractor Model AT–802 airplane rudder pedal jamming in flight. The pilot was able to maintain control and land. After landing, a cable pulley in the rudder system was found broken. Air Tractor believes one or more unsecured items in the baggage compartment became entangled in the cables and caused them to jam, resulting in failure of the pulley. Air Tractor has designed a modification kit that installs shielding in the baggage compartment to prevent unsecured stowed items from becoming entangled in the rudder-aileron interconnect cable system. This condition, if not corrected, could result in jamming of the rudder-aileron interconnect cables by unsecured items in the baggage compartment, which could result in failure of the rudderaileron interconnect cable system. This failure could lead to loss of control. Relevant Service Information We have reviewed Snow Engineering Co., Service Letter #274, Revision A, dated April 6, 2009. The service information describes procedures for installing a cable shield in the baggage compartment. FAA’s Determination and Requirements of the Proposed AD We are proposing this AD because we evaluated all information and determined the unsafe condition described previously is likely to exist or develop on other products of the same type design. This proposed AD would require installing a rudder-aileron interconnect cable system shield kit and securing any items stowed in the baggage compartment using tie downs and/or a cargo net until the cable shield kit is installed. Normally, the FAA would use a compliance time of hours time-inservice (TIS) or a certain number of months. The proposed AD uses a calendar date for compliance instead of hours TIS or a certain number of months. We are using the calendar date of before December 31, 2009, to allow owners with airplanes used in agricultural spray operations until the end of the spray season to install the rudder-aileron interconnect cable system shields (terminating action). Differences Between This Proposed AD and the Service Information This proposed AD would require securing stowed items in the baggage compartment with tie-down straps or a cargo net until the rudder-aileron interconnect cable system shield required in the proposed AD is E:\FR\FM\29MYP1.SGM 29MYP1

Agencies

[Federal Register Volume 74, Number 102 (Friday, May 29, 2009)]
[Proposed Rules]
[Pages 25682-25684]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E9-12522]


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

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0495; Directorate Identifier 2009-NM-049-AD]
RIN 2120-AA64


Airworthiness Directives; Learjet Model 60 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain Learjet Model 60 airplanes. This proposed AD would require 
revising the Tire-Servicing section of the airplane maintenance manual 
and revising the Tires Limitation section of the airplane flight manual 
to incorporate revised procedures for servicing tires and checking for 
proper tire inflation. This proposed AD results from a report of the 
main landing gear tires blowing out during a takeoff roll. We are 
proposing this AD to prevent tire failure, which could result in 
failures of the braking and thrust reverser systems. In a critical 
phase of operation such as takeoff, loss of airplane control may 
result.

DATES: We must receive comments on this proposed AD by July 13, 2009.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942; telephone 
316-946-2000; fax 316-946-2220; e-mail ac.ict@aero.bombardier.com; 
Internet https://www.bombardier.com. You may review copies of the 
referenced service information at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information 
on the availability of this material at the FAA, call 425-227-1221 or 
425-227-1152.

Examining the AD Docket

    You may examine the AD docket on the Internet at https://www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this proposed AD, the regulatory 
evaluation, any comments received, and other information. The street 
address for the Docket Office (telephone 800-647-5527) is in the 
ADDRESSES section. Comments will be available in the AD docket shortly 
after receipt.

FOR FURTHER INFORMATION CONTACT: Don Ristow, Aerospace Engineer, 
Mechanical Systems and Propulsion Branch, ACE-116W, FAA, Wichita 
Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-
Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4120; fax 
(316) 946-4107.

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-2009-0495; 
Directorate Identifier 2009-NM-049-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

[[Page 25683]]

proposed AD because 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 we 
receive about this proposed AD.

Discussion

    We received a report of all four of the main landing gear tires 
blowing out during a takeoff roll of a Learjet Model 60 airplane. The 
airplane overran the end of the runway, ultimately stopping when it 
struck an embankment, and was destroyed by fire. Investigation of the 
tire fragments indicates that, in all four tires, there was evidence of 
internal heat damage consistent with under-inflation, over-loading, or 
a combination of both; damage to a tire under these conditions is 
cumulative. Tires that have been rolled or taxied at lower-than-
specified tire pressure settings may fail. We are proposing this AD to 
prevent tire failure, which could result in failures of the braking and 
thrust reverser systems. In a critical phase of operation such as 
takeoff, loss of airplane control may result.

Relevant Service Information

    We have reviewed Learjet 60 Temporary Revision (TR) 12-16, dated 
March 18, 2009, to the Learjet 60 Maintenance Manual; and Learjet 60 
Temporary Flight Manual Change (TFMC) 2009-03, dated March 9, 2009, to 
the Learjet 60 Airplane Flight Manual (AFM) and Learjet 60XR AFM. 
Learjet 60 TR 12-16 describes the procedures to use when checking for 
and maintaining proper tire inflation. Learjet 60 TFMC 2009-03 
describes procedures to use when checking for proper tire inflation 
within 96 hours (4 days) prior to takeoff.

FAA's Determination and Requirements of This Proposed AD

    We are proposing this AD because we evaluated all relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the(se) same type 
design(s). This proposed AD would require accomplishing the actions 
specified in the service information described previously.

Costs of Compliance

    We estimate that this proposed AD would affect 240 airplanes of 
U.S. registry. We also estimate that it would take about 1 work-hour 
per product to comply with this proposed AD. The average labor rate is 
$80 per work-hour. Based on these figures, we estimate the cost of this 
proposed AD to the U.S. operators to be $19,200, or $80 per product.

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, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    You can find our regulatory evaluation and the estimated costs of 
compliance in the AD Docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, 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:

Learjet: Docket No. FAA-2009-0495; Directorate Identifier 2009-NM-
049-AD.

Comments Due Date

    (a) We must receive comments by July 13, 2009.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Learjet Model 60 airplanes, certificated 
in any category, serial numbers 60-002 through 60-369 inclusive.

Subject

    (d) Air Transport Association (ATA) of America Code 32: Landing 
gear.

Unsafe Condition

    (e) This AD results from a report of the main landing gear tires 
blowing out during a takeoff roll. The Federal Aviation 
Administration is issuing this AD to prevent tire failure, which 
could result in failures of the braking and thrust reverser systems. 
In a critical phase of operation such as takeoff, loss of airplane 
control may result.

Compliance

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

Revise the Maintenance Manual (MM)

    (g) Within 14 days after the effective date of this AD, revise 
the Tire-Servicing section of Learjet 60 MM to include the 
information in Learjet 60 Temporary Revision (TR) 12-16, dated March 
18, 2009.

    Note 1:  The actions required by paragraph (g) of this AD may be 
done by inserting a copy of Learjet 60 TR 12-16, dated March 18, 
2009, into the Learjet 60 MM. When Learjet 60 TR 12-16 has been 
included in general revisions of the Learjet 60 MM, the general 
revisions may be inserted in the MM, provided the relevant 
information in the general revision is identical to that in the TR.

Revise the Airplane Flight Manual (AFM)

    (h) Within 14 days after the effective date of this AD, revise 
the Tires Limitations section of the Learjet 60 AFM or Learjet 60XR 
AFM, as applicable, to include the information in the Learjet 60 
Temporary Flight Manual Change (TFMC) 2009-03, dated March 9, 2009. 
Thereafter, operate the airplane according to the limitations and 
procedures in the TFMC.

    Note 2:  The actions required by paragraph (h) of this AD may be 
done by inserting a copy of Learjet 60 TFMC 2009-03, dated March 9, 
2009, into the Learjet 60 or 60XR

[[Page 25684]]

AFM, as applicable. When Learjet 60 TFMC 2009-03 has been included 
in general revisions of the applicable AFM, the general revisions 
may be inserted in the applicable AFM, provided the relevant 
information in the general revision is identical to that in Learjet 
60 TFMC 2009-03.

Alternative Methods of Compliance (AMOCs)

    (i)(1) The Manager, Wichita Aircraft Certification Office, FAA, 
has the authority to approve AMOCs for this AD, if requested using 
the procedures found in 14 CFR 39.19. Send information to ATTN: Don 
Ristow, Aerospace Engineer, Mechanical Systems and Propulsion 
Branch, ACE-116W, Wichita Aircraft Certification Office, FAA, 1801 
Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 
67209; telephone (316) 946-4120; fax (316) 946-4107.
    (2) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your principal maintenance inspector (PMI) or 
principal avionics inspector (PAI), as appropriate, or lacking a 
principal inspector, your local Flight Standards District Office. 
The AMOC approval letter must specifically reference this AD.

    Issued in Renton, Washington, on May 18, 2009.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E9-12522 Filed 5-28-09; 8:45 am]
BILLING CODE 4910-13-P
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