<table style="width:100%;">
<colgroup>
<col style="width: 1%" />
<col style="width: 1%" />
<col style="width: 2%" />
<col style="width: 1%" />
<col style="width: 0%" />
<col style="width: 3%" />
<col style="width: 12%" />
<col style="width: 0%" />
<col style="width: 0%" />
<col style="width: 0%" />
<col style="width: 1%" />
<col style="width: 3%" />
<col style="width: 0%" />
<col style="width: 1%" />
<col style="width: 0%" />
<col style="width: 1%" />
<col style="width: 0%" />
<col style="width: 0%" />
<col style="width: 2%" />
<col style="width: 12%" />
<col style="width: 1%" />
<col style="width: 2%" />
<col style="width: 4%" />
<col style="width: 2%" />
<col style="width: 3%" />
<col style="width: 0%" />
<col style="width: 0%" />
<col style="width: 7%" />
<col style="width: 2%" />
<col style="width: 0%" />
<col style="width: 0%" />
<col style="width: 1%" />
<col style="width: 1%" />
<col style="width: 2%" />
<col style="width: 1%" />
<col style="width: 1%" />
<col style="width: 2%" />
<col style="width: 4%" />
<col style="width: 7%" />
<col style="width: 0%" />
</colgroup>
<tbody>
<tr class="odd">
<td></td>
<td colspan="39">OMB Approval #: 2700-0042</td>
</tr>
<tr class="even">
<td></td>
<td colspan="22">amendment of solicitation/</td>
<td colspan="13">1. CONTRACT ID CODE</td>
<td colspan="4">PAGE OF PAGES</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="22">modification of contract amendment of
solicitation/modification of contract</td>
<td colspan="13"></td>
<td colspan="2">1</td>
<td colspan="2">2</td>
</tr>
<tr class="even">
<td></td>
<td colspan="11">2. AMENDMENT/MODIFICATION NO.</td>
<td colspan="8">3. EFFECTIVE DATE</td>
<td colspan="11">4. REQUISITION/PURCHASE REQ. NO.</td>
<td colspan="9">5. PROJECT NO. <em>(If applicable)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="11">274</td>
<td colspan="8">See Block 16c</td>
<td colspan="11"></td>
<td colspan="9"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="7">6. ISSUED BY</td>
<td colspan="4">CODE</td>
<td colspan="8">BH/H96</td>
<td colspan="12">7. ADMINISTERED BY <em>(If other than Item 6)</em></td>
<td colspan="3">CODE</td>
<td colspan="5"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="19"><p>Attn: BH/Susan L. Stefanovic</p>
<p>2101 NASA Parkway</p>
<p>Houston, TX. 77058</p></td>
<td colspan="20"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">8. NAME AND ADDRESS OF CONTRACTOR <em>(No., street,
county, State, and Zip Code)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39"><p>Lockheed Martin Space Operations</p>
<p>Attn.: Ms. Mary J. Parry/C79</p>
<p>2400 NASA Parkway</p>
<p>P.O. Box 58561</p>
<p>Houston, TX. 77058</p></td>
</tr>
<tr class="even">
<td></td>
<td colspan="5">CODE</td>
<td colspan="14"></td>
<td colspan="5">FACILITY CODE</td>
<td colspan="15"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">(x)</td>
<td colspan="15">9A. AMENDMENT OF SOLICITATION NO.</td>
<td colspan="20">9B. DATED <em>(SEE ITEM 11)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="15"></td>
<td colspan="20"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="15">10A. MODIFICATION OF CONTRACT/ORDER NO.</td>
<td colspan="20">10B. DATED <em>(SEE ITEM 13)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">X</td>
<td colspan="15">NAS 9-19100</td>
<td colspan="20">1/1/94</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</td>
</tr>
<tr class="even">
<td colspan="2"></td>
<td></td>
<td colspan="25">The above numbered solicitation is amended as set forth
in Item 14. The hour and date specified for receipt of Offers</td>
<td colspan="2"></td>
<td colspan="6">is extended,</td>
<td></td>
<td colspan="2">is not extended.</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">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:</td>
</tr>
<tr class="even">
<td></td>
<td colspan="12"></td>
<td colspan="2"></td>
<td colspan="25"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="12">(a) By completing Items 8 and 15, and returning</td>
<td colspan="2"></td>
<td colspan="25">copies of the amendment; (b) By acknowledging receipt
of this amendment on each copy of the offor</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">submitted; or (c) By separate letter or telegram which
includes a reference to the solicitation and amendment numbers. FAILURE
OF YOUR ACKNOWLEDGEMENT TO</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF
OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION
OF</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">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</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">or letter makes reference to the solicitation and this
amendment, and is received prior to the opening hour and date
specified.</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">12. ACCOUNTING AND APPROPRIATION DATA <em>(If
required)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="39"><p>13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF
CONTRACTS/ORDERS,</p>
<p>IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.(x)
(x)</p></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">(x)</td>
<td colspan="35">A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify
authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="35">CONTRACT ORDER NO. IN ITEM 10A.</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="35">B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO
REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying
office,</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="35">appropriation date, etc.) SET FORTH IN ITEM 14,
PURSUANT TO THE AUTHORITY OF FAR 43.103(b).</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="35">C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT
TO AUTHORITY OF:</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">X</td>
<td colspan="35">52.243-2 Changes – Cost Reimbursement</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="35">d. OTHER <em>(Specify type of modification and
authority)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="35"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="6"></td>
<td colspan="3"></td>
<td colspan="3"></td>
<td colspan="2"></td>
<td colspan="9"></td>
<td colspan="2"></td>
<td colspan="14"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="8"><strong>E. IMPORTANT:</strong> Contractor</td>
<td colspan="2"></td>
<td colspan="7">is not,</td>
<td>x</td>
<td colspan="8">is required to sign this document and return</td>
<td colspan="2">3</td>
<td colspan="11"><p>copies to the issuing office</p>
<p><strong>IMPORTANT:</strong> Contractor is not, is required to sign
this document and return copies to the issuing office.</p></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">14. description of amendment/modification
<em>(Organized by UCF section headings, including solicitation/contract
subject matter where feasible.)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">The purpose of this modification is to incorporate the
Electrical Power Systems Laboratory Support effort reflected in TWP
4HEPEP5FX. The performance-based contract value is increased by
$922,008.</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="19">15A. NAME AND TITLE OF SIGNER <em>(Type or
print)</em></td>
<td colspan="20">16A. NAME AND TITLE OF CONTRACTING OFFICER <em>(Type or
print)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="19">Mary J. Parry, SEAT Contract Manager</td>
<td colspan="20">Susan L. Stefanovic, Contracting Officer</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="15">15B. CONTRACTOR/OFFEROR15B. CONTRACTOR/OFFEROR</td>
<td colspan="4">15C. DATE SIGNED</td>
<td colspan="14">16B. UNITED STATES OF AMERICA</td>
<td colspan="6">16C. DATE SIGNED</td>
</tr>
<tr class="even">
<td></td>
<td colspan="3"></td>
<td colspan="10"></td>
<td colspan="2"></td>
<td colspan="4"></td>
<td colspan="2">BY</td>
<td colspan="11"></td>
<td></td>
<td colspan="6"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="15"><em>(Signature of person authorized to sign)</em></td>
<td colspan="4"></td>
<td colspan="14"><em>(Signature of Contracting Officer)</em></td>
<td colspan="6"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="16"><p>NSN 7540-01-152-8070</p>
<p>PREVIOUS EDITION UNUSABLE</p></td>
<td colspan="4">30-105</td>
<td colspan="19"><p><strong>STANDARD FORM 30</strong> (Rev. 10-83)</p>
<p>Prescribed by GSA</p>
<p>FAR (48 CFR) 53.243</p></td>
</tr>
</tbody>
</table>

I. Clause B.2 ESTIMATED COST AND AWARD FEE (NASA 18-52.216-85) (DEC
1991) is deleted in its entirety and the following substituted herein:

+--------------------------------------------------+---+----+----+----+
| S/A 274                                          |   |    |    |    |
|                                                  |   |    |    |    |
|   ------------------- ----------- ---            |   |    |    |    |
| -------------- --------------- ----------------- |   |    |    |    |
|                                                  |   |    |    |    |
|   Estimated   Award Fee         Total            |   |    |    |    |
|                                                  |   |    |    |    |
|   Cost                                           |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|   CLIN 1- LOE (prior                             |   |    |    |    |
|  \$785,930,100     \$45,067,438    \$830,997,538 |   |    |    |    |
|   to 10/1/98)                                    |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|   CLIN 1a - LOE       Mod 257                    |   |    |    |    |
|  \$314,274,263     \$16,546,874    \$330,821,137 |   |    |    |    |
|   (after 10/1/98)                                |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|   CLIN 2 - IDIQ (NTE                             |   |    |    |    |
| )                                                |   |    |    |    |
|                                                  |   |    |    |    |
|                       S/A 272                    |   |    |    |    |
|  \$555,989,307     \$30,038,736    \$586,028,043 |   |    |    |    |
|                                                  |   |    |    |    |
|                       S/A 274                    |   |    |    |    |
|     -\$869,506        -\$52,502       -\$922,008 |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|  \$555,119,801     \$29,986,234    \$585,106,035 |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|   CLIN 3 -                                       |   |    |    |    |
|                                                  |   |    |    |    |
|   PERFORMANCE-BASED                              |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                       S/A 272                    |   |    |    |    |
|  \$167,010,467     \$8,716,720     \$175,727,187 |   |    |    |    |
|                                                  |   |    |    |    |
|                       S/A 274                    |   |    |    |    |
|      \$869,506         \$52,502        \$922,008 |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|  \$167,879,973     \$8,769,222     \$176,649,195 |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|                                                  |   |    |    |    |
|   Total                           \              |   |    |    |    |
| $1,823,204,137   \$100,369,768   \$1,923,573,905 |   |    |    |    |
|   ------------------- ----------- ---            |   |    |    |    |
| -------------- --------------- ----------------- |   |    |    |    |
+--------------------------------------------------+---+----+----+----+
|                                                  |   |    |    |    |
+--------------------------------------------------+---+----+----+----+

(End of Clause)