UAL CORP /DE/
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<TYPE>EX-10.51
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<FILENAME>onetwo.htm
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<div align=right><font size=+0>Exhibit 10.50</font></div>

<center><b><font size=+0>Amendment No. 1</font></b>
<br><b><font size=+0>to</font></b>
<br><b><font size=+0>Glenn F. Tilton Secular Trust Agreement No. 2</font></b></center>

<p><font size=+0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
THIS AMENDMENT NO. 1 is made as of this 17th day of February, 2003 to the
Glenn F. Tilton Trust Agreement No. 2 dated September 5, 2002 (the "Trust")
by and among UAL Corporation (the "Company"), Glenn F. Tilton (the "Executive")
and The Northern Trust Company, as trustee (the "Trustee").</font>
<p><font size=+0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
WHEREAS, Section 9(a) of the Trust authorizes its amendment by a written
instrument executed by the Company, the Executive and the Trustee; and</font>
<p><font size=+0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
WHEREAS, the parties hereto wish to amend the Trust to reflect the terms
of the Amendment to Executive's Employment Agreement, dated February 17,
2003, a copy of which is attached.</font>
<p><font size=+0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
NOW, THEREFORE, the Company, Executive and Trustee agree as follows:</font>
<p><font size=+0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
1.&nbsp;&nbsp;&nbsp; The first sentence of Section 2(c) of the Trust is
amended and restated to read as follows:</font>
<dir>
<dir><font size=+0>"If, as provided in the amended Employment Agreement,
Executive's employment is terminated either by Executive other than for
Good Reason or by the Company for Cause and the effective date of such
termination is on or before September 2, 2004, then Executive will forfeit
100% of his interest in the Trust Fund."</font></dir>
</dir>
<font size=+0>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
IN WITNESS WHEREOF, the parties have executed this Amendment No. 1 as of
the date first above written.</font>
<br>&nbsp;
<br>&nbsp;
<center><table CELLSPACING=0 CELLPADDING=4 WIDTH="637" >
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<td VALIGN=TOP WIDTH="44%">Attest:
<p><u>/s/&nbsp; Mary Jo C. Georgen</u>
<br>Name:&nbsp;&nbsp; Mary Jo C. Georgen
<br>Title:&nbsp;&nbsp; Assistant Corporate Secretary</td>

<td VALIGN=TOP WIDTH="56%">UAL CORPORATION
<p>By:&nbsp; <u>/s/&nbsp; Francesca M. Maher</u>
<br>Name:&nbsp; Francesca M. Maher
<br>Title:&nbsp; Sr. Vice President, General Counsel &amp; Secretary</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="44%">&nbsp;</td>

<td VALIGN=TOP WIDTH="56%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="44%">Attest:
<p><u>/s/&nbsp; Helen M. Stirk</u>
<br>Name:&nbsp; Helen M. Stirk
<br>Title:&nbsp;&nbsp;&nbsp;&nbsp; Sr. Vice President &amp; Assistant Secretary</td>

<td VALIGN=TOP WIDTH="56%">THE NORTHERN TRUST COMPANY, as Trustee
<p>By:&nbsp; <u>/s/&nbsp; James R. Jacobson</u>
<br>Name:&nbsp; James R. Jacobson
<br>Title:&nbsp; Second Vice President</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="44%">&nbsp;</td>

<td VALIGN=TOP WIDTH="56%">&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP WIDTH="44%">&nbsp;</td>

<td VALIGN=TOP WIDTH="56%">GLENN F. TILTON
<p><u>/s/&nbsp; Glenn F. Tilton</u></td>
</tr>
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