Bombardier DHC-8 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 colspan="3" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Bombardier </span><span>DHC-8 aircraft, </span><span>with </span><span>models and serial numbers as listed in the Requiremen</span><span>t Table.</span></p></td></tr><tr><td rowspan="8" style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Requirement:</span></p></td><td colspan="3" style="width:414.55pt; border-bottom:0.75pt solid #000000; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Remove all black film thermal insulation blankets from the aircraft fuselage and flight</span><span> </span><span>compartment and replace them with AN4C Aluminized (silver) film insulation</span><span> </span><span>blankets; in accordance with the Part III Accomplishment Instructions of the</span><span> </span><span>Bombardier Inc., de Havilland Dash 8 Service Bulletins listed in the following table:</span></p></td></tr><tr style="height:3.9pt"><td style="width:95.6pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>DHC-8 Models</span></p></td><td style="width:115.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>Serial Numbers</span></p></td><td style="width:182.4pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>Service Bulletin Numbers</span></p></td></tr><tr style="height:3.6pt"><td style="width:95.6pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>102, 103, &amp; 106</span></p></td><td style="width:115.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>003 to 353</span></p></td><td style="width:182.4pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>8-25-89 as in force from time to time</span></p></td></tr><tr style="height:3.6pt"><td style="width:95.6pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>102, 103, &amp; 106</span></p></td><td style="width:115.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>003 to 371</span></p></td><td style="width:182.4pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>8-25-90 as in force from time to time</span></p></td></tr><tr style="height:3.6pt"><td style="width:95.6pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>102, 103, 106, 301, 311, &amp; 314</span></p></td><td style="width:115.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>003 to 337, 339, 341 to 347, 349, 350, 351, 353, &amp; 356</span></p></td><td style="width:182.4pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>8-25-91 as in force from time to time</span></p></td></tr><tr style="height:3.6pt"><td style="width:95.6pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>301, 311, &amp; 314</span></p></td><td style="width:115.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>100 to 336, 342, 350, &amp; 356</span></p></td><td style="width:182.4pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>8-25-92 as in force from time to time</span></p></td></tr><tr style="height:3.6pt"><td style="width:95.6pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>301, 311, &amp; 314</span></p></td><td style="width:115.15pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>100 to 336, 342, 350, 356, 365, &amp; 370</span></p></td><td style="width:182.4pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>8-25-93 as in force from time to time</span></p></td></tr><tr style="height:3.6pt"><td colspan="3" style="width:414.55pt; border-top:0.75pt solid #000000; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span style="font-style:italic">Note 1: </span><span style="font-style:italic"></span><span style="font-style:italic">Transport Canada AD CF-94-08R1 refers.</span></p><p><span style="font-style:italic">Note 2: </span><span style="font-style:italic"></span><span style="font-style:italic">This Directive is not applicable to aircraft that have had all three de</span><span style="font-style:italic"> </span><span style="font-style:italic">Havilland Modifications 8/2004, 8/2006, and 8/2007 incorporated during</span><span style="font-style:italic"> </span><span style="font-style:italic">manufacture.</span></p><p><span style="font-style:italic">Note 3:</span><span style="font-style:italic"> </span><span style="font-style:italic">The words “as in force from time to time” require compliance with the most recent version of the referenced document.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Compliance:</span></p></td><td colspan="3" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Unless already accomplished in accordance with the previous issue of this Directive,</span><span> </span><span>prior to </span><span>26</span><span> November 2017</span><span> or as indicated in Part 1.D of the service bulletins listed in</span><span> </span><span>the Requirement Table, whichever occurs later.</span></p><p><span style="font-style:italic">Note 4:</span><span style="font-style:italic"> </span><span style="font-style:italic"></span><span style="font-style:italic">Previous compliance with </span><span style="font-style:italic">the</span><span style="font-style:italic"> requirement in AD/</span><span style="font-style:italic">DHC-8</span><span style="font-style:italic">/</span><span style="font-style:italic">34 </span><span style="font-style:italic">Amdt</span><span style="font-style:italic"> 1</span><span style="font-style:italic"> constitutes compliance with the requirement in this AD.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td colspan="3" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Th</span><span>is</span><span> </span><span>AD </span><span>commences on</span><span> </span><span>26</span><span> October 2017.</span></p></td></tr><tr><td style="width:74.35pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Background:</span></p></td><td colspan="3" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Operators have reported corrosion forming on areas of the aircraft where black film</span><span> </span><span>thermal insulation blankets are being used. De Havilland’s investigation found that</span><span> </span><span>the black film, which covers these insulation blankets, contains carbon. If</span><span> </span><span>condensation is present, corrosion may occur in places where the black film is in</span><span> </span><span>contact with any aluminium structure.</span><span></span></p><p><span>Amendment 1 </span><span>of this AD </span><span>wa</span><span>s issued in response to a revision of the Transport Canada AD which</span><span> </span><span>change</span><span>d</span><span> the applicability to </span><span>align</span><span> with the applicability of the latest revision of the</span><span> </span><span>mandated service bulletins.</span></p><p><span>Amendment 2 of this AD is issued to correct </span><span>two </span><span>minor typographical errors in the serial number range of the last row of the Requirement Table.</span></p></td></tr></tbody></table>