Airworthiness Directive · Amendment 39-15121 · Air Tractor, Inc. Models AT-602, AT-802, and AT-802A Airplanes
Air Tractor, Inc. Models AT-602, AT-802, and AT-802A Airplanes
Superseded. A later AD replaced this one: AD 2008-10-12. Comply with the one in force.
This AD affects all Models AT-602, AT-802, and AT-802A airplanes, all serial numbers, that are certificated in any category.
We are adopting a new airworthiness directive (AD) that supersedes AD 2006-22-08, which applies to all Air Tractor, Inc. (Air Tractor) Models AT-602, AT-802, and AT-802A airplanes. AD 2006-22-08 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 2006-22-08, the FAA has received reports of two Model AT- 802A airplanes with cracked engine mounts below the initial compliance time in AD 2006-22-08. The FAA has determined that an initial inspection is required when the airplane reaches a total of 1,300 hours time-in-service (TIS) instead of 4,000 hours TIS required by AD 2006- 22-08. Consequently, this AD retains the actions of AD 2006-22-08 while requiring the initial inspection when the airplane reaches a total of 1,300 hours 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.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Visually inspect the engine mount for any cracks. | Initially inspect when 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 this AD), whichever occurs later, unless already done. Thereafter, inspect repetitively at intervals not to exceed 300 hours TIS. | Follow Snow Engineering Co. Service Letter #253, dated December 12, 2005, revised January 22, 2007. |
| (2) If you find any crack damage, do the following: (i) Obtain an FAA-approved repair scheme or replacement procedure from the manufacturer; and (ii) Repair following the FAA-approved repair scheme or replace the engine mount with a new engine mount following the replacement procedure. | Before further flight after any inspection required by paragraph (e)(1) of this AD where crack damage is found. If you repair the cracked engine mount, then continue to reinspect at intervals not to exceed 300 hours TIS, unless the repair scheme states differently. If you replace the engine mount, then initially inspect upon accumulating 1,300 hours TIS and repetitively at intervals not to exceed 300 hours TIS. | For obtaining a repair scheme or replacement procedure: Contact Air Tractor Inc., P.O. Box 485, Olney, Texas 76374; telephone: (940) 564-5616; facsimile: (940) 564-5612. |
| (3) Report any cracks that you find to the FAA at the address specified in paragraph (f) of this AD. Include in your report: (i) Airplane serial number; (ii) Airplane hours TIS and engine mount hours TIS; (iii) Crack location(s) and size(s); (iv) Corrective action taken; and (v) Point of contact name and telephone number. | Within the next 30 days after you find the cracks or within the next 30 days after August 10, 2007 (the effective date of this AD), whichever occurs later. | The Office of Management and Budget (OMB) approved the information collection requirements contained in this regulation under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and assigned OMB Control Number 2120-0056. |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
