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<td colspan="4"></td>
<td colspan="4"></td>
<td colspan="9">OMB Approval 2700-0042</td>
</tr>
<tr class="even">
<td colspan="8"></td>
<td colspan="4">1. CONTRACT ID CODE</td>
<td colspan="2">PAGE</td>
<td colspan="2">OF</td>
<td>PAGE(S)</td>
</tr>
<tr class="odd">
<td colspan="8">AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT</td>
<td colspan="4"><blockquote>
<p>     </p>
</blockquote></td>
<td colspan="3">1</td>
<td colspan="2">1</td>
</tr>
<tr class="even">
<td colspan="3">2. AMENDMENT/MODIFICATION NO.</td>
<td colspan="3">3. EFFECTIVE DATE</td>
<td colspan="5">4. REQUISITION/PURCHASE REQ. NO.</td>
<td colspan="6">5. PROJECT NO. <em>(If applicable)</em></td>
</tr>
<tr class="odd">
<td colspan="3"><blockquote>
<p>1</p>
</blockquote></td>
<td colspan="3"><h1 id="april-16-2002">April 16, 2002</h1></td>
<td colspan="5"><blockquote>
<p>RBC.1156</p>
</blockquote></td>
<td colspan="6"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="2">6. ISSUED BY</td>
<td colspan="3">CODE</td>
<td></td>
<td colspan="4">7. ADMINISTERED BY <em>(If other than Item 6)</em></td>
<td colspan="3">CODE</td>
<td colspan="4"></td>
</tr>
<tr class="odd">
<td colspan="6"><blockquote>
<p>National Aeronautics and Space Administration</p>
<p>Langley Research Center</p>
<p>Hampton, VA 23681-2199</p>
</blockquote></td>
<td colspan="11"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="8">8. NAME AND ADDRESS OF CONTRACTOR <em>(No. Street,
County, State and ZIP: Code)</em></td>
<td>()</td>
<td colspan="8">9A. AMENDMENT OF SOLICITATION NO.</td>
</tr>
<tr class="odd">
<td colspan="8" rowspan="8"><blockquote>
<p>TO ALL INTERESTED OFFERORS.</p>
</blockquote></td>
<td></td>
<td colspan="8" rowspan="2"><h2 id="rbc.1156">1-155-RBC.1156</h2></td>
</tr>
<tr class="even">
<td rowspan="2"><blockquote>
<p>X</p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="8">9B. DATED <em>(SEE ITEM 11)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="8"><blockquote>
<p><strong>April 4, 2002</strong></p>
</blockquote></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="8">10A. MODIFICATION OF CONTRACT/ORDER NO.</td>
</tr>
<tr class="even">
<td></td>
<td colspan="8" rowspan="2"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="odd">
<td rowspan="2"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="8">10B. DATED <em>(SEE ITEM 13)</em></td>
</tr>
<tr class="odd">
<td colspan="4">CODE</td>
<td colspan="4">FACILITY CODE</td>
<td></td>
<td colspan="8"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="17"><strong>11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</strong></td>
</tr>
<tr class="odd">
<td colspan="17"><p> The above numbered solicitation is amended as set
forth in Item 14. The hour and date specified for receipt of Offers
<strong>X</strong> is extended, is not extended.</p>
<p>Offers must acknowledge receipt of this amendment prior to the hour
and date specified in the solicitation or as amended, by one of the
following methods:</p>
<p>(a) By completing Items 8 and 15, and returning one (1) copy of the
amendment; (b) By acknowledging receipt of this amendment on each copy
of the offer submitted; or (c) By separate letter or telegram which
includes a reference to the solicitation and amendment numbers. FAILURE
OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE
RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATA SPECIFIED MAY RESULT IN
REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to
change an offer already submitted, such change may be made by telegram
or letter, provided each telegram or letter makes reference to the
solicitation and this amendment, and is received prior to the opening
hour and data specified.</p></td>
</tr>
<tr class="even">
<td colspan="17">12. ACCOUNTING AND APPROPRIATION DATA <em>(If
required)</em></td>
</tr>
<tr class="odd">
<td colspan="17"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="17"><p><strong>13. THIS ITEM APPLIES ONLY TO MODIFICATIONS
OF CONTRACTS/ORDERS,</strong></p>
<p><strong>IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM
14.</strong></p></td>
</tr>
<tr class="odd">
<td>()</td>
<td colspan="16">A. THIS CHANGE ORDER IS ISSUED PURSUANT TO:
<em>(Specify authority)</em> THE CHANGES SET FORTH IN ITEM 14 ARE MADE
IN THE CONTRACT ORDER NO. IN ITEM 10A.</td>
</tr>
<tr class="even">
<td>     </td>
<td colspan="16"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="odd">
<td>     </td>
<td colspan="16">B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO
REFLECT THE ADMINISTRATIVE CHANGES <em>(such as changes in paying
office, appropriation date, etc.)</em> SET FORTH IN ITEM 14, PURSUANT TO
THE AUTHORITY OF FAR 43.103(b).</td>
</tr>
<tr class="even">
<td rowspan="2">     </td>
<td colspan="16">C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT
TO AUTHORITY OF:</td>
</tr>
<tr class="odd">
<td colspan="16"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td rowspan="2">     </td>
<td colspan="16">D. OTHER Specify type of modification and
authority)</td>
</tr>
<tr class="odd">
<td colspan="16"><blockquote>
<p>     </p>
</blockquote></td>
</tr>
<tr class="even">
<td colspan="17">E. <strong>IMPORTANT:</strong> Contractor is not, is
required to sign this document and return _<u>     </u>_ copies to the
issuing office.</td>
</tr>
<tr class="odd">
<td colspan="17">14. DESCRIPTION OF AMENDMENT/MODIFICATION
<em>(Organized by UCF section headings, including solicitation/contract
subject matter where feasible.)</em></td>
</tr>
<tr class="even">
<td colspan="17"><p>The Request for Quote (RFQ) page identifies two
conflicting dates: Response date: April 17, 2002 and Closing Date: April
19, 2002; due to the ambiguity of these dates, this modification
clarifies the RFQ response/closing date to <strong>April 19,
2002</strong>. Consequently, RFQs are due April 19, 20002.</p>
<p>All other terms and conditions remain the same.</p></td>
</tr>
<tr class="odd">
<td colspan="17"></td>
</tr>
<tr class="even">
<td colspan="17">Except at provided herein, all terms and conditions of
the document referenced in Item 9A or 10A, as heretofore changed,
remains unchanged and in full force and effect.</td>
</tr>
<tr class="odd">
<td colspan="6">15A. NAME AND TITLE OF SIGNER <em>(Type or
print)</em></td>
<td colspan="11">16A. NAME AND TITLE OF CONTRACTING OFFICER <em>(Type or
print)</em></td>
</tr>
<tr class="even">
<td colspan="6"><blockquote>
<p>     </p>
</blockquote></td>
<td colspan="11"><blockquote>
<p><strong>KIM DUNCAN</strong></p>
</blockquote></td>
</tr>
<tr class="odd">
<td colspan="5"></td>
<td>15C. DATE SIGNED</td>
<td colspan="7">16B. UNITED STATES OF AMERICA</td>
<td colspan="4">16C. DATE SIGNED</td>
</tr>
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<td colspan="5"></td>
<td></td>
<td rowspan="2">BY</td>
<td colspan="6"><h2 id="section"></h2></td>
<td colspan="4"><h2 id="april-16-2002-1"> April 16, 2002</h2></td>
</tr>
<tr class="odd">
<td colspan="5"><em>(Signature of person authorized to sign)</em></td>
<td></td>
<td colspan="6"><em>(Signature of Contracting Officer)</em></td>
<td colspan="4"></td>
</tr>
<tr class="even">
<td colspan="4"><p>NSN 7540-01-152-8070</p>
<p>PREVIOUS EDITION UNUSABLE</p></td>
<td colspan="4"><p>30-105</p>
<p>Computer Generated</p></td>
<td colspan="9"><p>STANDARD FORM 30 (REV. 10-83)</p>
<p>Prescribed by GSA FAR (48 CFR) 53.243</p></td>
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