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AD/B717/25 - Power Conversion Distribution Unit
Boeing 717 Series AeroplanesBoeing 717 Series Aeroplanes
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Boeing 717 Series Aeroplanes
| AD/B717/25 | Power Coversion Distribution Unit | 11/2007 |
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| Applicability: | Model 717-200 aeroplanes. |
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| Requirement: | 1. Inspect the power conversion distribution units (PCDU) to determine its part number. A review of aeroplane maintenance records is acceptable in lieu of this inspection if the part number can be conclusively determined from that review. If the PCDU part number is 762904E or higher, no further work is required by this Directive. |
| 2. If, as a result of the Requirement 1 inspection, it is determined that the PCDU part number is below 762904E, carry out the following: | |
| a. Modify the PCDU in accordance with Boeing Alert Service Bulletin (ASB) 717-24A0028, Revision 1, dated 20 December 2005. | |
| Note 1: A modification accomplished before the effective date of this Directive in accordance with Boeing ASB 717-24A0028, dated 24 November 2004, is acceptable for compliance with Requirement 2.a. | |
| Note 2: Boeing ASB 717-24A0028 refers to Hamilton Sundstrand Service Bulletin 40EGS22P-24-10, Revision 1, dated 11 May 2005, as an additional source of service information for the modification. | |
| b. Accomplish the applicable actions specified in Table 1. |
<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></span></p></td><td colspan="2" style="width:414.55pt; border-bottom:0.75pt solid #000000; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Table 1</span></p></td></tr><tr style="height:13.15pt"><td rowspan="2" style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">Do the following:</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="text-align:center"><span style="font-weight:bold">In accordance with </span><span style="font-weight:bold">Hamilton</span><span style="font-weight:bold"> Sundstrand Service Bulletin (SB):</span></p></td></tr><tr style="height:13.1pt"><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="margin-bottom:11pt"><span>Rework the transformer rectifier unit assembly (TRU)</span></p><p class="NormalWeb" style="margin-top:11pt; margin-bottom:10pt"><span>Rework the W3 wiring harness assembly to install direct lead wires to the TRU</span></p><p class="NormalWeb" style="margin-top:10pt; margin-bottom:11pt"><span>Add a ground wire to the TRU transformer</span></p><p style="margin-top:11pt"><span>Add an insulated spacer to the PCDU top cover</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>40EGS22P-24-3, dated 30</span><span> </span><span>June</span><span> </span><span>2000</span></p></td></tr><tr style="height:13.1pt"><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>Install new PCDU 186 firmware</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>40EGS22P-24-4, Revision 1, dated 2</span><span> </span><span>January</span><span> </span><span>2002</span></p></td></tr><tr style="height:13.1pt"><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>Install new PCDU 186 firmware</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>40EGS22P-24-6, dated 25</span><span> </span><span>July</span><span> </span><span>2002</span></p></td></tr><tr style="height:13.1pt"><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>Modify the top cover of the PCDU</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>40EGS22P-24-7, dated 3</span><span> </span><span>September</span><span> </span><span>2003</span></p></td></tr><tr style="height:13.1pt"><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p style="margin-bottom:12pt"><span>Modify printed wiring board (PWB) assemblies A4 and A5</span></p><p style="margin-top:12pt"><span>Check and apply torque seal to fasteners on the TRU assembly and to PCDU internal fasteners, as applicable</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>40EGS22P-24-8, dated 4</span><span> </span><span>September</span><span> </span><span>2003</span></p></td></tr><tr style="height:13.1pt"><td style="width:74.35pt; border-right:0.75pt solid #000000; padding-right:4.97pt; padding-left:5.35pt; vertical-align:top"><p><span></span></p></td><td style="width:256.9pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>Modify PWB assembly A4</span></p></td><td style="width:146.95pt; border:0.75pt solid #000000; padding-right:4.97pt; padding-left:4.97pt; vertical-align:top"><p><span>40EGS22P-24-9, dated 19</span><span> </span><span>November</span><span> </span><span>2003</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="2" style="width:414.55pt; border-top:0.75pt solid #000000; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>Later revisions of the above SBs, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-19-03 are considered acceptable for compliance with the equivalent Requirements of this Directive.</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="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p class="Note"><span>Note 3:</span><span> </span><span>FAA AD 2007-19-03 Amdt 39-15193 refers.</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="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>For Requirements 1 and 2.a. - Within 20 months after the effective date of this Directive.</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="2" style="width:414.55pt; padding-right:5.35pt; padding-left:5.35pt; vertical-align:top"><p><span>For Requirement 2.b. - Before or concurrently with the Requirement 2.a. modification.</span></p></td></tr></tbody></table>