Costs of Compliance

We estimate that this AD affects 368 airplanes in the U.S. registry.

We estimate the following costs to do each required inspection: Total cost per Total cost on U.S. Labor cost Parts cost airplane per operators for initial inspection inspection 1.5 workhours x $80 per hour = $120... Not Applicable............ $120 368 x $120 = $44,160.

We have no way of determining the number of airplanes that may need replacement of the engine mount. We estimate the following costs to do the replacement:
Total cost per Labor cost Parts cost airplane per Total cost on U.S. operators inspection for initial inspection 81 workhours x $80 per hour = $6,480........ $3,982 $10,462 368 x $10,462 = $3,850,016. [[Page 62911]]

Any required ``uponcondition'' repairs would vary depending upon the damage found during each inspection. Based on this, we have no way of determining the potential repair costs for each airplane. 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 AD. Regulatory Findings

We have determined that this AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify that this 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. 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 summary of the costs to comply with this AD (and other information as included in the Regulatory Evaluation) and placed it in the AD Docket. You may get a copy of this summary by sending a request to us at the address listed under ADDRESSES. Include ``Docket No. FAA200624228; Directorate Identifier 2006CE22AD'' in your request.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment
Accordingly, under the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:
PART 39AIRWORTHINESS 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. FAA amends Sec. 39.13 by adding a new AD to read as follows: 20062208 Air Tractor, Inc.: Amendment 3914805; Docket No. FAA 200624228; Directorate Identifier 2006CE22AD.
Effective Date
(a) This AD becomes effective on December 1, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD affects all Models AT602, AT802, and AT802A airplanes, all serial numbers, that are certificated in any category.
Unsafe Condition
(d) This AD results from reports of cracked engine mounts. 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: Actions Compliance Procedures (1) Visually inspect the Initially inspect Follow Snow engine mount for any cracks. upon accumulating Engineering Co. 4,000 hours timein Service Letter service (TIS) or 253, dated within the next 100 December 12, 2005. hours TIS after
December 1, 2006
(the effective date
of this AD),
whichever occurs
later, unless
already done.
Thereafter,
repetitively
inspect every 300
hours TIS.
(2) If you find any crack Before further For obtaining a damage, do one of the flight after any repair scheme: following: inspection required Follow Snow (i) Obtain an FAAapproved by paragraph (e)(1) Engineering Co. repair scheme and of this AD where Service Letter incorporate this repair crack damage is 253, dated scheme; or found. If you December 12, 2005. (ii) Replace the engine repair the cracked For the mount with a new engine engine mount, then replacement: The mount. continue to maintenance manual reinspect at includes intervals not to instructions for exceed 300 hours the replacement. TIS, unless the
repair scheme
states differently.
If you replace the
engine mount, then
initially inspect
upon accumulating
4,000 hours TIS and
repetitively at
intervals not to
exceed 300 hours
TIS thereafter.
(3) Report any cracks that Within the next 10 The Office of you find to the FAA at the days after you find Management and address specified in the cracks or Budget (OMB) paragraph (f) of this AD. within the next 10 approved the Include in your report: days after December information (i) Airplane serial number; 1, 2006 (the collection (ii) Airplane and engine effective date of requirements mount hours TIS; this AD), whichever contained in this (iii) Crack location(s) and occurs later. regulation under size(s); the provisions of (iv) Corrective action the Paperwork taken; and Reduction Act and (v) Point of contact name assigned OMB and telephone number. Control Number 2120 0056.
[[Page 62912]]
Alternative Methods of Compliance (AMOCs)
(f) The Manager, Fort Worth Airplane Certification Office, FAA, Attn: Andrew McAnaul, Aerospace Engineer, ASW150 (c/o MIDO43), 10100 Reunion Place, Suite 650, San Antonio, Texas 78216; telephone: (210) 3083365; facsimile: (210) 3083370, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19.
Material Incorporated by Reference
(g) You must do the actions required by this AD following the instructions in Snow Engineering Co. Service Letter 253, dated December 12, 2005. The Director of the Federal Register approved the incorporation by reference of this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To get a copy of this service information, contact Air Tractor, Inc., P.O. Box 485, Olney, Texas 76374; telephone: (940) 5645616; facsimile: (940) 564 5612. To review copies of this service information, go to the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html or call (202) 7416030. To view the AD docket,
go to the Docket Management Facility; U.S. Department of
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL 401, Washington, DC 20590001 or on the Internet at http://dms.dot.gov. The docket number is FAA200624228; Directorate

Identifier 2006CE22AD.

Issued in Kansas City, Missouri, on October 13, 2006. James E. Jackson,
Acting Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. E617828 Filed 102606; 8:45 am]
BILLING CODE 491013P

FOR FURTHER INFORMATION CONTACT

Andrew McAnaul, Aerospace Engineer, ASW150 (c/o MIDO43), 10100 Reunion Place, Suite 650, San Antonio, Texas 78216; telephone: (210) 3083365; facsimile: (210) 3083370.