Enstrom F-28 Series HelicoptersEnstrom F-28 Series Helicopters

Enstrom F-28 Series Helicopters

<table cellspacing="0" cellpadding="0" style="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>Enstrom Helicopter Company </span><span>Model F-28A, F-28C, and F-28F helicopters, excluding serial number (S/N) 816 and subsequent; Model 280, 280C, 280F, and 280FX helicopters, excluding S/N 2100 and subsequent; and Model TH-28, 480, and 480B helicopters, excluding S/N 5058 and subsequent.</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:21.25pt; margin-bottom:12pt; text-indent:-21.25pt"><span>1.</span><span style="width:12.25pt; text-indent:0pt; display:inline-block"> </span><span>Review the helicopter maintenance records and determine the date that each push-pull rod, part number (P/N) 28-16253 - all dash numbers (for Model F-28A, F- 28C, F-28F, 280, 280C, 280F, and 280FX helicopters) and P/N 4140532 - all dash numbers (for Model TH-28, 480, and 480B helicopters), was installed. If the date cannot be determined from the maintenance records, use the ``Date MFD'', which is located on the helicopter data plate, as the installation date for the push- pull rod.</span></p><p style="margin-top:12pt; margin-left:21.25pt; margin-bottom:12pt; text-indent:-21.25pt"><span>2.</span><span style="width:12.25pt; text-indent:0pt; display:inline-block"> </span><span>For Model F-28A, F-28C, F-28F, 280, 280C, 280F, and 280FX helicopters, visually inspect the exterior and interior of each of the three push-pull rods for corrosion severe enough to cause pitting or any moisture, paying special attention to the area of the lower fitting, in accordance with section 5.1., INSPECTION, in Enstrom Helicopter Corporation Service Directive Bulletin No. 0096, dated 10 September 2003 (SDB 0096).</span></p><p style="margin-top:12pt; margin-left:21.3pt; text-indent:-21.3pt; text-align:center"><span style="font-weight:bold; text-decoration:underline">Table 1</span></p><table cellspacing="0" cellpadding="0" style="margin-top:0pt; margin-bottom:0pt; border:0.75pt solid #000000; border-collapse:collapse"><tbody><tr><td style="width:126.9pt; border-right:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt; text-align:center"><span style="font-weight:bold">Helicopter models</span></p></td><td style="width:134.75pt; border-right:0.75pt solid #000000; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt; text-align:center"><span style="font-weight:bold">Push-pull rod service life</span></p></td><td style="width:119.1pt; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt; text-align:center"><span style="font-weight:bold">Compliance times</span></p></td></tr><tr><td style="width:126.9pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Model F-28A, F-28C, F-28F, 280, 280C, 280F, and 280FX helicopters.</span></p></td><td style="width:134.75pt; border:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Push-pull rod that has been installed for 20 or more years.</span></p></td><td style="width:119.1pt; border-top:0.75pt solid #000000; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Inspect within 10 hours time-in-service (TIS) or at next annual inspection, whichever occurs first.</span></p></td></tr><tr><td style="width:126.9pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Model F-28A, F-28C, F-28F, 280, 280C, 280F, and 280FX helicopters.</span></p></td><td style="width:134.75pt; border:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Push-pull rod that has been installed for 10 or more years, but less than 20 years.</span></p></td><td style="width:119.1pt; border-top:0.75pt solid #000000; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Inspect within 50 hours TIS or at the next annual inspection, whichever occurs first.</span></p></td></tr><tr><td style="width:126.9pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Model F-28A, F-28C, F-28F, 280, 280C, 280F, and 280FX helicopters.</span></p></td><td style="width:134.75pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; border-left:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Push-pull rod that has been installed for less than 10 years.</span></p></td><td style="width:119.1pt; border-top:0.75pt solid #000000; border-left:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="margin-top:3pt; margin-bottom:3pt"><span>Inspect before the service life of the push-pull rod reaches 10 years since initial installation.</span></p></td></tr></tbody></table><p></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 style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="margin-left:49.65pt; margin-bottom:12pt; text-indent:-21.3pt"><span>a)</span><span style="width:11.98pt; text-indent:0pt; display:inline-block"> </span><span>If corrosion without pitting is found on a push-pull rod, then repair, reassemble, remark, and reinstall it in accordance with section 5.2., REPAIR/REASSEMBLY, in SDB 0096.</span></p><p style="margin-top:12pt; margin-left:49.65pt; margin-bottom:12pt; text-indent:-21.3pt"><span>b)</span><span style="width:11.3pt; text-indent:0pt; display:inline-block"> </span><span>If corrosion is found that is severe enough to cause pitting, or if any moisture is visible on the inside of a push-pull rod, replace it with an airworthy push-pull rod.</span></p><p style="margin-top:12pt; margin-bottom:12pt"><span style="font-style:italic">Note 1:</span><span style="font-style:italic"> </span><span style="font-style:italic">Determining continued serviceability of the push-pull rods by inspecting the exterior only of each push-pull rod is described in Enstrom Helicopter Corporation Service Information Letter No. 0156, dated 9 December 2003.</span></p><p style="margin-top:12pt; margin-left:21.85pt; margin-bottom:12pt; text-indent:-21.85pt"><span>3.</span><span style="width:12.85pt; text-indent:0pt; display:inline-block"> </span><span>For Model TH-28, 480 and 480B helicopters, visually inspect the exterior and interior of each of the three push-pull rods for corrosion severe enough to cause pitting or any moisture, paying special attention to the area of the lower fitting, in accordance with section 5.1., INSPECTION, in Enstrom Helicopter Corporation Service Directive Bulletin No. T-019, dated 10 September 2003 (SDB T-019).</span></p><p style="margin-top:12pt; margin-left:21.85pt; text-indent:-21.85pt; text-align:center"><span style="font-weight:bold; text-decoration:underline">Table 2</span></p><table cellspacing="0" cellpadding="0" style="margin-top:0pt; margin-bottom:0pt; border:0.75pt solid #000000; border-collapse:collapse"><tbody><tr><td style="width:126.9pt; border-right:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Helicopter models</span></p></td><td style="width:134.75pt; border-right:0.75pt solid #000000; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Push-pull rod service life</span></p></td><td style="width:119.1pt; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Compliance times</span></p></td></tr><tr><td style="width:126.9pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>Model TH-28, 480, and 480B helicopters.</span></p></td><td style="width:134.75pt; border:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>Push-pull rod that has been installed for 10 or more years.</span></p></td><td style="width:119.1pt; border-top:0.75pt solid #000000; border-left:0.75pt solid #000000; border-bottom:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>Inspect within 50 hours TIS or at the next annual inspection, whichever occurs first.</span></p></td></tr><tr><td style="width:126.9pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>Model TH-28, 480, and 480B helicopters.</span></p></td><td style="width:134.75pt; border-top:0.75pt solid #000000; border-right:0.75pt solid #000000; border-left:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>Push-pull rod that has been installed for less than 10 years.</span></p></td><td style="width:119.1pt; border-top:0.75pt solid #000000; border-left:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>Inspect before the service life of the push-pull rod reaches 10 years since initial installation.</span></p></td></tr></tbody></table><p style="margin-left:42.55pt; margin-bottom:12pt; text-indent:-20.7pt"><span>a)</span><span style="width:11.38pt; text-indent:0pt; display:inline-block"> </span><span>If corrosion without pitting is found on a push-pull rod, then repair, reassemble, remark, and reinstall it in accordance with section 5.2., REPAIR/REASSEMBLY, in SDB T-019.</span></p><p style="margin-top:12pt; margin-left:42.55pt; margin-bottom:12pt; text-indent:-20.7pt"><span>b)</span><span style="width:10.7pt; text-indent:0pt; display:inline-block"> </span><span>If corrosion is found that is severe enough to cause pitting, or if any moisture is visible on the inside of a push-pull rod, replace it with an airworthy push-pull rod.</span></p><p class="Note" style="margin-top:12pt; margin-bottom:12pt"><span>Note 2:</span><span> </span><span>Determining continued serviceability of the push-pull rods by inspecting the exterior only of each push-pull rod is described in Enstrom Helicopter Corporation Service Information Letter No. T-019.</span></p><p class="Note" style="margin-top:12pt"><span>Note 3:</span><span> </span><span>FAA AD 2007-11-02 </span><span>Amdt 39-15059 dated 5 July 2007 refers.</span></p></td></tr></tbody></table>