Airworthiness Directives; Cessna Aircraft Company Models 172R, 172S, 182S, 182T, T182T, 206H, and T206H Airplanes

Airworthiness Directives; Cessna Aircraft Company Models 172R, 172S, 182S, 182T, T182T, 206H, and T206H Airplanes

<p><strong><font color = "Blue">2007-05-10 CESSNA AIRCRAFT COMPANY:</font> </strong> Amendment 39-14971; Docket No. </p>
<p>FAA-2006-25261; Directorate Identifier 2006-CE-38-AD. <strong></strong></p>
<p><strong>&nbsp; </strong></p>
<p><strong>Airworthiness Directives; Cessna Aircraft Company Models 172R, 172S, 182S, 182T, T182T, 206H, and T206H Airplanes </strong></p>
<p><strong>&nbsp; </strong></p>
<p><strong>SUMMARY: </strong> The FAA adopts a new airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 172R, 172S, 182S, 182T, T182T, 206H, and T206H airplanes. This AD requires you to install Modification Kit MK172-25-10C or a steel lock rod/bar on both crew seat back cylinder lock assemblies. If a steel lock rod/bar has already been installed on the crew seat back cylinder lock assembly, no further action is required. If you have already installed Modification Kit MK172-25-10A or MK172-25-10B, this AD requires you to do an installation inspection and correct any discrepancies found. This AD results from reports of the crew seat back cylinder lock assembly failing at the aft end and other cylinder lock assemblies found cracked. We are issuing this AD to prevent the crew seat back cylinder lock assembly from bending, cracking, or failing. This failure could cause uncontrolled movement of the seat back, resulting in possible backward collapse during flight. Backward collapse of either crew seat back could result in an abrupt pitch-up if the affected crew member continues to hold on to the control yoke during this failure and could cause difficulty in exiting the airplane from an aft passenger seat after landing. </p>
<p>&nbsp; </p>
<p><strong>Effective Date </strong></p>
<p>(a) This AD becomes effective on April 11, 2007. </p>
<p>&nbsp; </p>
<p><strong>Affected ADs </strong></p>
<p>(b) None. </p>
<p>&nbsp; </p>
<p><strong>Applicability </strong></p>
<p>(c) This AD affects the following airplane models and serial numbers that are certificated in any category: </p>
<p>&nbsp; </p>
<table cellspacing="0" cellpadding="0">
  <tr>
    <td width="83" valign="top"><p align="center"><strong>Model </strong></p></td>
    <td width="236" valign="top"><p align="center"><strong>Serial Nos. </strong></p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>172R </p></td>
    <td width="236" valign="top"><p>17280001 through 17281262. </p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>172S </p></td>
    <td width="236" valign="top"><p>172S8001 through 172S9994. </p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>182S </p></td>
    <td width="236" valign="top"><p>18280001 through 18280944. </p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>182T </p></td>
    <td width="236" valign="top"><p>18280945 through 18281701. </p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>T182T </p></td>
    <td width="236" valign="top"><p>T18208001 through T18208453. </p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>206H </p></td>
    <td width="236" valign="top"><p>20608001 through 20608250. </p></td>
  </tr>
  <tr>
    <td width="83" valign="top"><p>T206H </p></td>
    <td width="236" valign="top"><p>T20608001 through T20608570. </p></td>
  </tr>
</table>
<p>&nbsp; </p>
<p><strong>Unsafe Condition </strong></p>
<p>(d) This AD results from reports of the crew seat back cylinder lock assembly failing at the aft end area and other cylinder lock assemblies found cracked. The actions specified in this AD are intended to prevent the crew seat cylinder lock assembly from bending, cracking, or failing. This failure could cause uncontrolled movement of the seat back, resulting in possible backward collapse during flight. Backward collapse of either crew seat back could result in an abrupt pitch-up if the affected crew member continues to hold on to the control yoke during this failure and could cause difficulty in exiting the airplane from an aft passenger seat after landing. </p>

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