Airworthiness Directives; Air Tractor, Inc. Models AT-400, AT-500, AT-600, and AT-800 Series Airplanes, 67687-67690 [E7-23229]

Download as PDF Federal Register / Vol. 72, No. 230 / Friday, November 30, 2007 / Proposed Rules challenge and the alternate order of removal entered pursuant to paragraph (d) shall immediately take effect. The Board shall advise the alien of the condition provided in this paragraph in writing as part of an order reinstating the immigration judge’s grant of voluntary departure. The automatic termination of a grant of voluntary departure and the effectiveness of the alternative order of removal shall not affect, in any way, the date that the order of the immigration judge or the Board became administratively final, as determined under the provisions of the applicable regulations in this chapter. Since the grant of voluntary departure is terminated by the filing of the petition for review, the alien will be subject to the alternate order of removal, but the penalties for failure to depart voluntarily under section 240B(d) of the Act shall not apply to an alien who files a petition for review, and who remains in the United States while the petition for review is pending. (j) Penalty for failure to depart. The civil penalty for failure to depart, pursuant to section 240B(d)(1)(A) of the Act, shall be set at $3,000 unless the immigration judge specifically orders a higher amount at the time of granting voluntary departure. The immigration judge shall advise the alien of the amount of this civil penalty at the time of granting voluntary departure. * * * * * PART 1241—APPREHENSION AND DETENTION OF ALIENS ORDERED REMOVED 4. The authority citation for part 1241 continues to read as follows: Authority: 5 U.S.C. 301, 552, 552a; 8 U.S.C. 1103, 1182, 1223, 1224, 1225, 1226, 227, 1231, 1251, 1253, 1255, 1330, 1362; 18 U.S.C. 4002, 4013(c)(4). 5. Section 1241.1 is amended by revising paragraph (f), to read as follows: § 1241.1 Final order of removal. rwilkins on PROD1PC63 with PROPOSALS-1 * * * * * (f) If an immigration judge issues an alternate order of removal in connection with a grant of voluntary departure, upon overstay of the voluntary departure period except as provided in the following sentence, or upon the failure to post a required voluntary departure bond if the respondent has waived appeal. If the respondent has filed a timely appeal with the Board, the order shall become final upon an order of removal by the Board or the Attorney General, or upon overstay of the voluntary departure period granted or VerDate Aug<31>2005 16:31 Nov 29, 2007 Jkt 214001 reinstated by the Board or the Attorney General. Dated: November 27, 2007. Michael B. Mukasey, Attorney General. [FR Doc. E7–23289 Filed 11–29–07; 8:45 am] BILLING CODE 4410–30–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–0258; Directorate Identifier 2007–CE–090–AD] RIN 2120–AA64 Airworthiness Directives; Air Tractor, Inc. Models AT–400, AT–500, AT–600, and AT–800 Series Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to supersede Airworthiness Directive (AD) 2007–13– 17, which applies to all Air Tractor, Inc. (Air Tractor) Models AT–602, AT–802, and AT–802A airplanes. AD 2007–13– 17 currently requires you to repetitively inspect the engine mount for any cracks, repair or replace any cracked engine mount, and report any cracks found to the FAA. Since we issued AD 2007–13– 17, Air Tractor has learned of a Model AT–502B with a crack located where the lower engine mount tube is welded to the engine mount ring. In addition, Snow Engineering Co. has developed gussets that, when installed according to their service letter, terminate the repetitive inspection requirement. Consequently, this proposed AD would retain the inspection actions of AD 2007–13–17 for Model AT–602, AT– 802, and AT–802A airplanes, including the compliance times and effective dates; establish new inspection actions for the AT–400 and AT–500 series airplanes; incorporate a mandatory terminating action for all airplanes; and terminate the reporting requirement of AD 2007–13–17. We are proposing this AD to detect and correct cracks in the engine mount, which could result in failure of the engine mount. Such failure could lead to separation of the engine from the airplane. DATES: We must receive comments on this proposed AD by January 29, 2008. ADDRESSES: Use one of the following addresses to comment on this proposed AD: SUMMARY: PO 00000 Frm 00014 Fmt 4702 Sfmt 4702 67687 • Federal eRulemaking Portal: Go to http://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; fax: (940) 564–5612. FOR FURTHER INFORMATION CONTACT: Andy McAnaul, Aerospace Engineer, ASW–150, FAA San Antonio MIDO–43, 10100 Reunion Pl, San Antonio, Texas 78216; phone: (210) 308–3365; fax: (210) 308–3370. SUPPLEMENTARY INFORMATION: Comments Invited 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–2007–0258; Directorate Identifier 2007–CE–090–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 http:// 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. Discussion Two reports of Model AT–802A airplanes with cracked engine mounts (at 2,815 hours time-in-service (TIS) and 1,900 hours TIS) caused us to issue AD 2007–13–17, Amendment 39–15121 (72 FR 36863, July 6, 2007). AD 2007–13– 17 currently requires the following on all Air Tractor Models AT–602, AT–802, and AT–802A airplanes: • Inspect (initially and repetitively) the engine mount for any cracks; • Repair or replace any cracked engine mount; and • Report any cracks found to the FAA. E:\FR\FM\30NOP1.SGM 30NOP1 67688 Federal Register / Vol. 72, No. 230 / Friday, November 30, 2007 / Proposed Rules Since we issued AD 2007–13–17, Air Tractor notified the FAA of a Model AT–502B airplane with a crack located where the lower engine mount tube is welded to the engine mount ring. The airplane had 8,436 total hours TIS. The cracking is similar to what prompted us to issue AD 2007–13–17. The Model AT–502B engine mount is the same design used in the Models AT– 400, AT–400A, AT–402, AT–402A, AT– 402B, AT–502, and AT–503A airplanes. The Model AT–502A airplane uses the same engine mount design as the airplanes affected by AD 2007–13–17. Therefore, we determined that these airplane models should be subject to the actions of AD 2007–13–17. Currently, the FAA is aware of the following airplanes that have had cracked engine mounts: • 1 Model AT–502B; • 3 Model AT–602; and • 11 Model AT–802/802A. This condition, if not corrected, could result in failure of the engine mount. Such failure could lead to separation of the engine from the airplane. In addition, Snow Engineering Co. developed gussets for an FAA-approved repair scheme to AD 2007–13–17. Snow Engineering Co. tested the engine mount with the gussets installed; and based on their test data, which has been approved by the FAA, installation of the gussets terminates the repetitive inspection requirement. Relevant Service Information We have reviewed Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007. The service information describes procedures for: • Performing a visual inspection of the engine mount for cracks; • Repairing the engine mount if cracks are found; and • Adding gussets to reinforce the engine mount and terminate the inspection requirement. 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 supersede AD 2007–13–17 with a new AD that would retain the inspection actions of AD 2007–13–17 for Models AT–602, AT–802, and AT–802A airplanes, including the compliance times and effective dates; establish new inspection actions for the AT–400 and AT–500 series airplanes; incorporate a mandatory terminating action for all airplanes; and terminate the reporting requirement of AD 2007–13–17. This 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 1,264 airplanes in the U.S. registry, including those airplanes affected by AD 2007–13–17. We estimate the following costs to do the proposed inspection: Labor cost Parts cost Total cost per airplane Total cost on U.S. operators 1.5 work-hours × $80 per hour = $120 ....................................................................................... $0 $120 $151,680 Labor cost Parts cost Total cost per airplane Total cost on U.S. operators 24 work-hours × $80 per hour = $1,920 ..................................................................................... $80 $2,000 $2,528,000 We estimate the following costs to do the repair/modification: 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. Authority for This Rulemaking rwilkins on PROD1PC63 with PROPOSALS-1 The estimated total cost on U.S. operators includes the cumulative costs associated with AD 2007–13–17 and those airplanes and actions being added in this AD. 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 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, 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 VerDate Aug<31>2005 16:31 Nov 29, 2007 Jkt 214001 PO 00000 Frm 00015 Fmt 4702 Sfmt 4702 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. Examining the AD Docket You may examine the AD docket that contains the proposed AD, the regulatory evaluation, any comments received, and other information on the Internet at http://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 Docket Office (telephone (800) 647–5527) is located at the street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. E:\FR\FM\30NOP1.SGM 30NOP1 67689 Federal Register / Vol. 72, No. 230 / Friday, November 30, 2007 / Proposed Rules 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 § 39.13 Comments Due Date [Amended] 2. The FAA amends § 39.13 by removing Airworthiness Directive (AD) 2007–13–17, Amendment 39–15121 (72 FR 36863, July 6, 2007), and adding the following new AD: Air Tractor, Inc.: Docket No. FAA–2007– 0258; Directorate Identifier 2007–CE– 090–AD. 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. (a) We must receive comments on this airworthiness directive (AD) action by January 29, 2008. Affected ADs (b) This AD supersedes AD 2007–13–17, Amendment 39–15121. Applicability (c) This AD applies to the following airplane models and serial numbers that are certificated in any category: Model Serial numbers AT–400, AT–400A, AT–402, AT–402A, and AT–402B ............................................................................................................. AT–502, AT–502A, AT–502B, and AT–503A ........................................................................................................................... AT–602 ...................................................................................................................................................................................... AT–802 and AT–802A ............................................................................................................................................................... Unsafe Condition (d) This AD results from a report of a Model AT–502B airplane with a crack located where the lower engine mount tube is welded to the engine mount ring. The airplane had 8,436 total hours time-in-service (TIS). We are issuing this AD to detect and correct cracks in the engine mount, which could result in failure of the engine mount. Such failure could lead to separation of the engine from the airplane. Compliance (e) To address this problem, you must do the following, unless already done: –0001 through –1175. –0001 through –2597. –0001 through –1141. –0001 through –0227. (1) For all airplanes with less than 5,000 hours total TIS that do not have gussets installed on the engine mount in accordance with Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007: Visually inspect the engine mount as follows: Affected airplanes Compliance Procedures (i) For all Models AT–602, AT–802, and AT– 802A airplanes. Initially before the airplane reaches a total of 1,300 hours TIS or within the next 100 hours TIS after August 10, 2007 (the effective date of AD 2007–13–17), whichever occurs later. Repetitively thereafter at intervals not to exceed 300 hours TIS. Initially before the airplane reaches a total of 1,300 hours TIS or within the next 100 hours TIS after the effective date of this AD, whichever occurs later. Repetitively thereafter at intervals not to exceed 300 hours TIS. Initially within the next 12 months after the effective date of this AD. Repetitively thereafter at intervals not to exceed 12 months. Follow Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007, or Snow Engineering Co. Service Letter #253, revised January 22, 2007. (ii) For all Model AT–502A airplanes ................. rwilkins on PROD1PC63 with PROPOSALS-1 (iii) For all Models AT–400, AT–400A, AT–402, AT–402A, AT–402B, AT–502, AT–502B, and AT–503A airplanes. (2) For all airplanes: Before further flight after any inspection required by paragraph (e)(1) of this AD where crack damage is found, repair and modify the engine mount by installing gussets following Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007. This modification terminates the repetitive inspections required in paragraphs (e)(1)(i), (e)(1)(ii), and (e)(1)(iii) of this AD. (3) For all airplanes: Before the airplane reaches 5,000 hours total TIS after the effective date of this AD or within the next 100 hours TIS after the effective date of this AD, whichever occurs later; inspect, repair if cracked, and modify the engine mount by installing gussets following Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007. This modification terminates the repetitive inspections required VerDate Aug<31>2005 16:31 Nov 29, 2007 Jkt 214001 in paragraphs (e)(1)(i), (e)(1)(ii), and (e)(1)(iii) of this AD. Note: As a terminating action to the repetitive inspections required in paragraphs (e)(1)(i), (e)(1)(ii), and (e)(1)(iii) of this AD, you may install the gussets before finding cracks or reaching 5,000 hours total TIS. Alternative Methods of Compliance (AMOCs) (f) The Manager, Forth Worth 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: Andy McAnaul, Aerospace Engineer, ASW–150, FAA San Antonio MIDO–43, 10100 Reunion Pl, San Antonio, Texas 78216; phone: (210) 308– 3365; fax: (210) 308–3370. Before using any approved AMOC on any airplane to which PO 00000 Frm 00016 Fmt 4702 Sfmt 4702 Follow Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007. Follow Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 2007. the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Related Information (g) To get copies of the service information referenced in this AD, contact Air Tractor Inc., P.O. Box 485, Olney, Texas 76374; telephone: (940) 564–5616; fax: (940) 564– 5612. To view the AD docket, go to U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590, or on the Internet at http://www.regulations.gov. The docket number is Docket No. FAA– 2007–0258; Directorate Identifier 2007–CE– 090–AD. E:\FR\FM\30NOP1.SGM 30NOP1 67690 Federal Register / Vol. 72, No. 230 / Friday, November 30, 2007 / Proposed Rules Issued in Kansas City, Missouri, on November 23, 2007. Steven W. Thompson, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–23229 Filed 11–29–07; 8:45 am] and the communities affected for Tulsa County, Oklahoma, and Incorporated Areas; specifically, for flooding sources ‘‘Horsepen Creek Tributary B’’ and ‘‘Horsepen Creek Tributary B Tributary,’’ that was previously published. BILLING CODE 4910–13–P Comments to be submitted on or before January 31, 2008. FOR FURTHER INFORMATION CONTACT: William R. Blanton, Jr., Engineering Management Branch, Mitigation Directorate, Federal Emergency Management Agency, 500 C Street, SW., Washington, DC 20472, (202) 646–2903. SUPPLEMENTARY INFORMATION: The Federal Emergency Management Agency (FEMA) publishes proposed determinations of Base (1-percentannual-chance) Flood Elevations (BFEs) and modified BFEs for communities participating in the National Flood Insurance Program (NFIP), in accordance with section 110 of the Flood Disaster Protection Act of 1973, 42 U.S.C. 4104, and 44 CFR 67.4(a). These proposed BFEs and modified BFEs, together with the floodplain management criteria required by 44 CFR 60.3, are the minimum that are required. They should not be construed to mean DATES: DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency 44 CFR Part 67 [Docket No. FEMA–B–7744] Proposed Flood Elevation Determinations; Correction Federal Emergency Management Agency, DHS. ACTION: Proposed rule; correction. AGENCY: SUMMARY: This document corrects the table to a proposed rule published in the Federal Register of November 2, 2007. This correction clarifies the table representing the flooding source(s), location of referenced elevation, the effective and modified elevation in feet Flooding source(s) that the community must change any existing ordinances that are more stringent in their floodplain management requirements. The community may at any time enact stricter requirements of its own, or pursuant to policies established by other Federal, State, or regional entities. These proposed BFEs are used to meet the floodplain management requirements of the NFIP and are also used to calculate the appropriate flood insurance premium rates for new buildings built after these elevations are made final, and for the contents in these buildings. Correction In proposed rule FR Doc. E7–21595, beginning on page 62182 in the issue of November 2, 2007, make the following corrections, in the table published under the authority of 44 CFR 67.4. On page 62182, in § 67.4, in the table with center heading Tulsa County, Oklahoma, and Incorporated Areas, the flooding source(s), location of referenced elevation, the effective and modified elevation in feet and the communities affected for flooding source ‘‘Horsepen Creek Tributary B’’, needs to be corrected to read as follows: *Elevation in feet (NGVD) +Elevation in feet (NAVD) # Depth in feet above ground Location of referenced elevation** Effective * * * * Communities affected Modified * * * Tulsa County, Oklahoma, and Incorporated Areas * Horsepen Creek Tributary B * * * Confluence with Horsepen Creek ...................................... * None ...... +642 Approximately 370 ft upstream of confluence with Horsepen Creek Tributary B Tributary. Confluence with Horsepen Creek Tributary B ................... None ...... +644 None ...... +643 Approximately 2800 ft upstream of confluence with Horsepen Creek Tributary B. * * * None ...... +650 Horsepen Creek Tributary B Tributary. rwilkins on PROD1PC63 with PROPOSALS-1 * VerDate Aug<31>2005 16:31 Nov 29, 2007 Jkt 214001 PO 00000 Frm 00017 Fmt 4702 Sfmt 4702 * * E:\FR\FM\30NOP1.SGM * 30NOP1 Unincorporated Areas of Tulsa County. Unincorporated Areas of Tulsa County. *

Agencies

[Federal Register Volume 72, Number 230 (Friday, November 30, 2007)]
[Proposed Rules]
[Pages 67687-67690]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-23229]


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

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-0258; Directorate Identifier 2007-CE-090-AD]
RIN 2120-AA64


Airworthiness Directives; Air Tractor, Inc. Models AT-400, AT-
500, AT-600, and AT-800 Series Airplanes

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

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to supersede Airworthiness Directive (AD) 2007-13-
17, which applies to all Air Tractor, Inc. (Air Tractor) Models AT-602, 
AT-802, and AT-802A airplanes. AD 2007-13-17 currently requires you to 
repetitively inspect the engine mount for any cracks, repair or replace 
any cracked engine mount, and report any cracks found to the FAA. Since 
we issued AD 2007-13-17, Air Tractor has learned of a Model AT-502B 
with a crack located where the lower engine mount tube is welded to the 
engine mount ring. In addition, Snow Engineering Co. has developed 
gussets that, when installed according to their service letter, 
terminate the repetitive inspection requirement. Consequently, this 
proposed AD would retain the inspection actions of AD 2007-13-17 for 
Model AT-602, AT-802, and AT-802A airplanes, including the compliance 
times and effective dates; establish new inspection actions for the AT-
400 and AT-500 series airplanes; incorporate a mandatory terminating 
action for all airplanes; and terminate the reporting requirement of AD 
2007-13-17. We are proposing this AD to detect and correct cracks in 
the engine mount, which could result in failure of the engine mount. 
Such failure could lead to separation of the engine from the airplane.

DATES: We must receive comments on this proposed AD by January 29, 
2008.

ADDRESSES: Use one of the following addresses to comment on this 
proposed AD:
     Federal eRulemaking Portal: Go to http://
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; fax: (940) 564-5612.

FOR FURTHER INFORMATION CONTACT: Andy McAnaul, Aerospace Engineer, ASW-
150, FAA San Antonio MIDO-43, 10100 Reunion Pl, San Antonio, Texas 
78216; phone: (210) 308-3365; fax: (210) 308-3370.

SUPPLEMENTARY INFORMATION:

Comments Invited

    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-
2007-0258; Directorate Identifier 2007-CE-090-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 http://
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.

Discussion

    Two reports of Model AT-802A airplanes with cracked engine mounts 
(at 2,815 hours time-in-service (TIS) and 1,900 hours TIS) caused us to 
issue AD 2007-13-17, Amendment 39-15121 (72 FR 36863, July 6, 2007). AD 
2007-13-17 currently requires the following on all Air Tractor Models 
AT-602, AT-802, and AT-802A airplanes:
     Inspect (initially and repetitively) the engine mount for 
any cracks;
     Repair or replace any cracked engine mount; and
     Report any cracks found to the FAA.

[[Page 67688]]

    Since we issued AD 2007-13-17, Air Tractor notified the FAA of a 
Model AT-502B airplane with a crack located where the lower engine 
mount tube is welded to the engine mount ring. The airplane had 8,436 
total hours TIS. The cracking is similar to what prompted us to issue 
AD 2007-13-17.
    The Model AT-502B engine mount is the same design used in the 
Models AT-400, AT-400A, AT-402, AT-402A, AT-402B, AT-502, and AT-503A 
airplanes. The Model AT-502A airplane uses the same engine mount design 
as the airplanes affected by AD 2007-13-17. Therefore, we determined 
that these airplane models should be subject to the actions of AD 2007-
13-17.
    Currently, the FAA is aware of the following airplanes that have 
had cracked engine mounts:
     1 Model AT-502B;
     3 Model AT-602; and
     11 Model AT-802/802A.
    This condition, if not corrected, could result in failure of the 
engine mount. Such failure could lead to separation of the engine from 
the airplane.
    In addition, Snow Engineering Co. developed gussets for an FAA-
approved repair scheme to AD 2007-13-17. Snow Engineering Co. tested 
the engine mount with the gussets installed; and based on their test 
data, which has been approved by the FAA, installation of the gussets 
terminates the repetitive inspection requirement.

Relevant Service Information

    We have reviewed Snow Engineering Co. Service Letter 253 
Rev. A, dated October 16, 2007.
    The service information describes procedures for:
     Performing a visual inspection of the engine mount for 
cracks;
     Repairing the engine mount if cracks are found; and
     Adding gussets to reinforce the engine mount and terminate 
the inspection requirement.

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 supersede AD 2007-13-17 with a new AD that would retain the 
inspection actions of AD 2007-13-17 for Models AT-602, AT-802, and AT-
802A airplanes, including the compliance times and effective dates; 
establish new inspection actions for the AT-400 and AT-500 series 
airplanes; incorporate a mandatory terminating action for all 
airplanes; and terminate the reporting requirement of AD 2007-13-17. 
This 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 1,264 airplanes in 
the U.S. registry, including those airplanes affected by AD 2007-13-17.
    We estimate the following costs to do the proposed inspection:

----------------------------------------------------------------------------------------------------------------
                                                                                 Total cost per   Total cost on
                          Labor cost                              Parts cost        airplane      U.S. operators
----------------------------------------------------------------------------------------------------------------
1.5 work-hours x $80 per hour = $120.........................              $0             $120         $151,680
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do the repair/modification:

----------------------------------------------------------------------------------------------------------------
                                                                                 Total cost per   Total cost on
                          Labor cost                              Parts cost        airplane      U.S. operators
----------------------------------------------------------------------------------------------------------------
24 work-hours x $80 per hour = $1,920........................             $80           $2,000       $2,528,000
----------------------------------------------------------------------------------------------------------------

    The estimated total cost on U.S. operators includes the cumulative 
costs associated with AD 2007-13-17 and those airplanes and actions 
being added in this AD.

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 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD and placed it in the AD docket.

Examining the AD Docket

    You may examine the AD docket that contains the proposed AD, the 
regulatory evaluation, any comments received, and other information on 
the Internet at http://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 Docket Office (telephone (800) 647-5527) 
is located at the street address stated in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

[[Page 67689]]

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 removing Airworthiness Directive 
(AD) 2007-13-17, Amendment 39-15121 (72 FR 36863, July 6, 2007), and 
adding the following new AD:

Air Tractor, Inc.: Docket No. FAA-2007-0258; Directorate Identifier 
2007-CE-090-AD.

Comments Due Date

    (a) We must receive comments on this airworthiness directive 
(AD) action by January 29, 2008.

Affected ADs

    (b) This AD supersedes AD 2007-13-17, Amendment 39-15121.

Applicability

    (c) This AD applies to the following airplane models and serial 
numbers that are certificated in any category:

------------------------------------------------------------------------
                Model                            Serial numbers
------------------------------------------------------------------------
AT-400, AT-400A, AT-402, AT-402A, and  -0001 through -1175.
 AT-402B.
AT-502, AT-502A, AT-502B, and AT-503A  -0001 through -2597.
AT-602...............................  -0001 through -1141.
AT-802 and AT-802A...................  -0001 through -0227.
------------------------------------------------------------------------

Unsafe Condition

    (d) This AD results from a report of a Model AT-502B airplane 
with a crack located where the lower engine mount tube is welded to 
the engine mount ring. The airplane had 8,436 total hours time-in-
service (TIS). We are issuing this AD to detect and correct cracks 
in the engine mount, which could result in failure of the engine 
mount. Such failure could lead to separation of the engine from the 
airplane.

Compliance

    (e) To address this problem, you must do the following, unless 
already done:
    (1) For all airplanes with less than 5,000 hours total TIS that 
do not have gussets installed on the engine mount in accordance with 
Snow Engineering Co. Service Letter #253 Rev. A, dated October 16, 
2007: Visually inspect the engine mount as follows:

------------------------------------------------------------------------
     Affected airplanes            Compliance            Procedures
------------------------------------------------------------------------
(i) For all Models AT-602,    Initially before the  Follow Snow
 AT-802, and AT-802A           airplane reaches a    Engineering Co.
 airplanes.                    total of 1,300        Service Letter
                               hours TIS or within   253 Rev.
                               the next 100 hours    A, dated October
                               TIS after August      16, 2007, or Snow
                               10, 2007 (the         Engineering Co.
                               effective date of     Service Letter
                               AD 2007-13-17),       253,
                               whichever occurs      revised January 22,
                               later. Repetitively   2007.
                               thereafter at
                               intervals not to
                               exceed 300 hours
                               TIS.
(ii) For all Model AT-502A    Initially before the  Follow Snow
 airplanes.                    airplane reaches a    Engineering Co.
                               total of 1,300        Service Letter
                               hours TIS or within   253 Rev.
                               the next 100 hours    A, dated October
                               TIS after the         16, 2007.
                               effective date of
                               this AD, whichever
                               occurs later.
                               Repetitively
                               thereafter at
                               intervals not to
                               exceed 300 hours
                               TIS.
(iii) For all Models AT-400,  Initially within the  Follow Snow
 AT-400A, AT-402, AT-402A,     next 12 months        Engineering Co.
 AT-402B, AT-502, AT-502B,     after the effective   Service Letter
 and AT-503A airplanes.        date of this AD.      253 Rev.
                               Repetitively          A, dated October
                               thereafter at         16, 2007.
                               intervals not to
                               exceed 12 months.
------------------------------------------------------------------------

    (2) For all airplanes: Before further flight after any 
inspection required by paragraph (e)(1) of this AD where crack 
damage is found, repair and modify the engine mount by installing 
gussets following Snow Engineering Co. Service Letter 253 
Rev. A, dated October 16, 2007. This modification terminates the 
repetitive inspections required in paragraphs (e)(1)(i), (e)(1)(ii), 
and (e)(1)(iii) of this AD.
    (3) For all airplanes: Before the airplane reaches 5,000 hours 
total TIS after the effective date of this AD or within the next 100 
hours TIS after the effective date of this AD, whichever occurs 
later; inspect, repair if cracked, and modify the engine mount by 
installing gussets following Snow Engineering Co. Service Letter 
253 Rev. A, dated October 16, 2007. This modification 
terminates the repetitive inspections required in paragraphs 
(e)(1)(i), (e)(1)(ii), and (e)(1)(iii) of this AD.

    Note: As a terminating action to the repetitive inspections 
required in paragraphs (e)(1)(i), (e)(1)(ii), and (e)(1)(iii) of 
this AD, you may install the gussets before finding cracks or 
reaching 5,000 hours total TIS.

Alternative Methods of Compliance (AMOCs)

    (f) The Manager, Forth Worth 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: Andy 
McAnaul, Aerospace Engineer, ASW-150, FAA San Antonio MIDO-43, 10100 
Reunion Pl, San Antonio, Texas 78216; phone: (210) 308-3365; fax: 
(210) 308-3370. Before using any approved AMOC on any airplane to 
which the AMOC applies, notify your appropriate principal inspector 
(PI) in the FAA Flight Standards District Office (FSDO), or lacking 
a PI, your local FSDO.

Related Information

    (g) To get copies of the service information referenced in this 
AD, contact Air Tractor Inc., P.O. Box 485, Olney, Texas 76374; 
telephone: (940) 564-5616; fax: (940) 564-5612. To view the AD 
docket, go to U.S. Department of Transportation, Docket Operations, 
M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey 
Avenue, SE., Washington, DC 20590, or on the Internet at http://
www.regulations.gov. The docket number is Docket No. FAA-2007-0258; 
Directorate Identifier 2007-CE-090-AD.


[[Page 67690]]


    Issued in Kansas City, Missouri, on November 23, 2007.
Steven W. Thompson,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E7-23229 Filed 11-29-07; 8:45 am]
BILLING CODE 4910-13-P