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AD/BELL 222/44 - Disc Assemblies - Tail Rotor Driveshaft
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AD/BELL 222/44 - Disc Assemblies - Tail Rotor Driveshaft
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| AD/BELL 222/44 | Disc Assemblies - Tail Rotor Driveshaft | 12/2007 DM |
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<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>Bell Helicopter Textron Canada (BHTC) Model 230 helicopters S/N up to 23038 fitted with disc assemblies part number (P/N) 36300-1, 37855-1 and C048354-1.</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; margin-bottom:12pt; text-indent:-21.3pt"><span>1.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Verify disc assemblies P/N 36300-1, 37855-1 and C048354-1 for manufacturing date, proper thickness and indexing, in accordance with the instructions provided in BHTC Alert Service Bulletin (ASB) ASB-230-07-37 dated 28 March 2007 or later approved revisions.</span></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span style="width:21.3pt; text-indent:0pt; display:inline-block"></span><span>If disc assemblies, after verification in accordance with Requirement 1, do not require any further action, or if the manufacturing date is not between 01 November 2005 and 30 November 2006, make an appropriate log book entry to this effect. No further action is required.</span></p><p style="margin-top:12pt; margin-left:21.3pt; text-indent:-21.3pt"><span>2.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Remove any disc assembly which is not within the required thickness as per table below:</span></p><table cellspacing="0" cellpadding="0" style="margin-top:0pt; margin-left:36pt; margin-bottom:0pt; border:0.75pt solid #000000; border-collapse:collapse"><tbody><tr><td style="width:102.6pt; 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 style="font-weight:bold">Disc Assembly P</span><span style="font-weight:bold">/N</span></p></td><td colspan="2" style="width:223.2pt; 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">Total Thickness</span></p></td></tr><tr><td style="width:102.6pt; 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></span></p></td><td style="width:106.2pt; border:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span style="font-weight:bold">Minimum</span></p></td><td style="width:106.2pt; 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 style="font-weight:bold">Maximum</span></p></td></tr><tr><td style="width:102.6pt; 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>36300-1</span></p></td><td style="width:106.2pt; border:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>0.174 inch (4.42 mm)</span></p></td><td style="width:106.2pt; 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>0.186 inch (4.75 mm)</span></p></td></tr><tr><td style="width:102.6pt; 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>37855-1</span></p></td><td style="width:106.2pt; border:0.75pt solid #000000; padding-right:5.03pt; padding-left:5.03pt; vertical-align:top"><p><span>0.126 inch (3.20 mm)</span></p></td><td style="width:106.2pt; 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>0.138 inch (3.50 mm)</span></p></td></tr><tr><td style="width:102.6pt; 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>C048354-1</span></p></td><td style="width:106.2pt; 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>0.046 inch (1.16 mm)</span></p></td><td style="width:106.2pt; 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>0.051 inch (1.29 mm)</span></p></td></tr></tbody></table><p style="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>Remove any disc assembly which is not properly indexed.</span></p><p style="margin-top:12pt; margin-left:21.3pt; margin-bottom:12pt; text-indent:-21.3pt"><span>4.</span><span style="width:12.3pt; text-indent:0pt; display:inline-block"> </span><span>Do not install any of the disc assemblies P/N 36300-1, 37855-1 and C048354-1 into any helicopter unless it is compliant to the ASB-230-07-37 dated 28 March 2007 or later approved revisions.</span></p><p class="Note" style="margin-top:12pt"><span>Note:</span><span> </span><span>Transport </span><span>Canada</span><span> Airworthiness Directive CF-2007-15 dated 24 August 2007 refers.</span></p></td></tr></tbody></table>
| Compliance: | 1. Unless already accomplished, no later than 25 flight hours or 30 days from the effective date of this directive, whichever comes first.2. Within 10 flight hours, after the completion of requirement 1.3. Within 300 flight hours or at next scheduled inspection, whichever comes first, after the completion of requirement 1.4. After the effective date of this Airworthiness Directive. |
|---|---|
| This Airworthiness Directive becomes effective on 3 October 2007. | |
| Background: | Transport Canada has determined that disc assemblies part number (P/N) 36300-1, 37855-1 and C048354-1 manufactured between 1 November 2005 and 30 November 2006, may have discs of improper thickness or discs may have been indexed incorrectly. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
28 September 2007