Airtractor AT-300, 400 and 500 Series Ae

Airtractor AT-300, 400 and 500 Series Aeroplanes

<table cellspacing="0" cellpadding="0" style="width:510.3pt; margin-top:0pt; margin-bottom:0pt; border-collapse:collapse"><tbody><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Applicability:</span></p></td><td style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Models AT-501, AT-502, AT-502A, AT-502B, and AT-503A aircraft.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Requirement:</span></p></td><td style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="margin-left:21.3pt; text-indent:-21.3pt"><span>1.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>The following table specifies the safe life of the wing lower spar cap for affected aircraft that do not incorporate and never have incorporated Marburger Enterprises Inc. winglets.</span><span> </span><span>Retire at or before reaching the safe lives listed.</span></p><table cellspacing="0" cellpadding="0" style="width:425.25pt; margin-top:0pt; margin-bottom:0pt; border-collapse:collapse"><tbody><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Model</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Serial Numbers</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Safe Life</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-501</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0002 through 0061</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>4,531 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-501</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0062 and subsequent</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>7,693 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0003 and subsequent</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1,650 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502A</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0158 and subsequent</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1,650 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502B</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0187 through 0654, except 0643</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1,650 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502B</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>6243, and 0655 through 0692</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>9,000 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502B</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0693 through 0701</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>9,500 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502B</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0702 and subsequent</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>9,800 hours TIS</span></p></td></tr><tr style="height:5.25pt"><td style="width:81.45pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-503A</span></p></td><td style="width:194.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0067 and subsequent</span></p></td><td style="width:116.85pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1,650 hours TIS</span></p></td></tr></tbody></table><p style="margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span>2.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>If piston powered aircraft have been converted to turbine power, use the limits for the corresponding serial number turbine powered aircraft.</span></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span>3.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Aircraft that have been modified to install lower spar caps, part numbers 21058-1 and 21058-2, should have a safe life of 9,800 hours TIS.</span></p><p style="margin-top:12pt; margin-left:21.3pt; text-indent:-21.3pt"><span>4.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Some aircraft at some stage could have been fitted with Marburger Enterprises Inc. winglets.</span><span> </span><span>These winglets are installed in accordance with Supplemental Type Certificate (STC) SA00490LA.</span><span> </span><span>Use the winglet usage factor indicated in the table below, the wing lower spar cap safe life specified above, and the instructions included in FAA AD 2006-24-10 Appendix 1, to determine the new safe life for aircraft that incorporate or have incorporated Marburger winglets.</span></p></td></tr><tr style="height:626.85pt"><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><table cellspacing="0" cellpadding="0" style="width:425.25pt; margin-top:0pt; margin-bottom:0pt; border-collapse:collapse"><tbody><tr style="height:5.25pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Model</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Serial Numbers</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Winglet Usage Factor</span></p></td></tr><tr style="height:5.25pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-501</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0002 through 0061</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1.6</span></p></td></tr><tr style="height:5.25pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-501</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0062 and subsequent</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1.6</span></p></td></tr><tr style="height:5.25pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0003 through 0236</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1.6</span></p></td></tr><tr style="height:5.25pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502A</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0158 through 0238</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1.6</span></p></td></tr><tr style="height:5.25pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502A</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0239 and subsequent</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1.2</span></p></td></tr><tr style="height:13.1pt"><td style="width:102.7pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>AT-502B</span></p></td><td style="width:159.4pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>0187 and subsequent</span></p></td><td style="width:131.05pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span>1.2</span></p></td></tr></tbody></table><p class="Note" style="margin-bottom:12pt"><span>Note 1:</span><span> </span><span>FAA AD 2006-24-10 Appendix 1 and Appendix 2 may be obtained from the FAA Internet web site </span><a href="file:///\\act01srv001\CERTBRANCH\CASA%20AD's%20-%20Individual\2005%20-%20Issue%201-6\3-2005\www.airweb.faa.gov\rgl" style="text-decoration:none"><span class="Hyperlink" style="font-style:normal">www.airweb.faa.gov/rgl</span></a><span> or by request to the Authority Internet address </span><a href="mailto:airworthiness.directives@casa.gov.au" style="text-decoration:none"><span class="Hyperlink" style="font-style:normal">airworthiness.directives@casa.gov.au</span></a></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span>5.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Model AT-502B aircraft, serial number 0643, serial number 0655 and subsequent, and all other aircraft that have been modified with replacement spar caps, part number part numbers 21058-1 and 21058-2, are not eligible to have STC SA00490LA installed without additional fatigue data being provided to the FAA.</span></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span>6.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Modify the applicable aircraft records as follows to show the reduced safe life for the wing lower spar cap by using the information contained in Requirement 1 and Requirement 4 of this Directive, and FAA AD 2006-24-10 Appendix 1, as applicable:</span></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt"><span>Incorporate the following into the Aircraft Logbook, “</span><span style="font-style:italic">In accordance with AD/AT/21 Amdt 3, (AD/AT/21 Amdt 2 or AD/AT/20 Amdt 4) the wing lower spar cap is life limited to ___</span><span>”.</span></p><p class="BodyTextIndent" style="margin-top:12pt; margin-bottom:12pt"><span>7.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Accomplish the actual replacement /modification in accordance with Snow Engineering Drawing No. 21050, Snow Engineering Service Letter No. 197 or No. 205, both revised 26 March 2001, as applicable.</span></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span>8.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>To extend the safe life of the wing lower spar cap for certain aircraft, accomplish an eddy current inspection and modify the wing lower spar cap in accordance with the procedures included as part of the Alternative Method Of Compliance (AMOC) in Appendix 2 to FAA AD 2006-24-10.</span></p><p style="margin-top:12pt; margin-left:21.3pt; text-indent:-21.3pt"><span>9.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>For Model AT-502B aircraft, serial numbers 502B-0643 and 502B-0655 through 502B-0692:</span><span> </span><span>Cold work the left hand and right hand two outboard wing centre splice block bolt holes (four total) in the lower spar cap, in accordance with Snow Engineering Service Letter No. 244, dated 25 April 2005.</span></p></td></tr></tbody></table>

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David Villiers
Delegate of the Civil Aviation Safety Authority

4 January 2007