Airworthiness Directive · Amendment 39-15767 · Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 Series Airplanes
Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 Series Airplanes
This AD applies to the following airplane models and serial numbers that are certificated in any category:
| Group 1 models | Serial Nos. |
|---|---|
| AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-402, AT-402A, and AT-402B | -0001 through -1196. |
| AT-501, AT-502, AT-502A, and AT-502B | -0001 through -2620. |
| AT-602 | -0337 through -1153. |
| AT-802A | -0003 through -0282. |
| Group 2 models | Serial Nos. |
|---|---|
| AT-401B | -0952 through -1196. |
We are adopting a new airworthiness directive (AD) to supersede AD 2008-11-17, which applies to certain Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 series airplanes. AD 2008-11-17 currently requires you to install an overturn skid plate kit or a modification to the overturn skid plate already installed. Since we issued AD 2008-11-17, the manufacturer has notified us that Model AT-401B airplanes also need a modification to the overturn skid plate. Consequently, this AD would retain the actions of AD 2008-11-17 and add the requirement to modify the overturn skid plate installed on Model AT-401B airplanes. We are issuing this AD to prevent the front and rear connections of the overturn skid plate to the airplane from breaking, which could allow foreign debris to enter the cockpit during an airplane overturn. This condition, if not corrected, could lead to pilot injury.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) For Group 1 airplanes: If overturn skid plate part number (P/N) 11411-1-500 or an FAA-approved equivalent P/N is already installed then install P/N 11411-1-501 modification kit | Within the next 180 days after July 7, 2008 (the effective date of AD 2008-11-17) | Follow Snow Engineering Co. Service Letter #97, revised November 7, 2007; or Snow Engineering Co. Service Letter #97, revised September 19, 2008. |
| (2) For Group 1 airplanes: If there is no overturn skid plate installed, then install overturn skid plate kit P/N 11411-1-502 or an FAA-approved equivalent part number | Within the next 180 days after July 7, 2008 (the effective date of AD 2008-11-17) | Follow Snow Engineering Co. Service Letter #97, revised November 7, 2007; or Snow Engineering Co. Service Letter #97, revised September 19, 2008. |
| (3) For Group 2 airplanes: Install P/N 11411-1-501 modification kit | Within the next 180 days after January 28, 2009 (the effective date of this AD) | Follow Snow Engineering Co. Service Letter #97, revised September 19, 2008. |
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.
