EXHIBIT 10.30 UNITED AIRLINES February 28, 1995 Via facsimile: 206-237-1706 Mr. R. C. Nelson Regional Director, Aircraft Contracts Boeing Commercial Airplane Group P.O. Box 3707 Seattle, WA 98124-2207 Re: (1) Letter Agreement 6-1162-DLJ-89lRl to Purchase Agreement No. 1670 dated December 18, 1990 as amended and supplemented among The Boeing Company and United Air Lines, Inc. and United Worldwide Corporation (2) Boeing Proposal Letters 6-1162-MMF-045 & 6-1162- RCN-839 dated January 23, 1995 Gentlemen: Reference is made to Letter Agreement No. 6-1162-DLJ-89lRl (the "Letter Agreement") to Purchase Agreement No. 1670 dated December 18, 1990(as previously amended and supplemented, including all previously executed letter agreements, the "Purchase Agreement") among The Boeing Company ("Boeing") and United Air Lines, Inc. ("United") relating to the sale by Boeing and the purchase by United (the "Buyer") of Model 747-400 aircraft; and reference is made to Boeing Proposal Letters 6-1162-MMF-045 and 6-1162-RCN-839 both dated January 23, 1995 (the "Proposal Letters"). This letter amendment (this "Letter Amendment"), when accepted by Buyer, will become part of the Letter Agreement and part of the Purchase Agreement, and will evidence our further agreement with respect to the matters set forth below. All terms used herein and in the Letter Agreement, and not defined herein, shall have the same meaning as in the Letter Agreement. If there is any inconsistency between the terms of this Letter Amendment and the Letter Agreement or the Purchase Agreement, the terms of this Letter Amendment will govern. * CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT If the foregoing correctly sets forth your understanding of our agreement with respect to the matters addressed above, please indicate your acceptance and approval below. UNITED AIR LINES, INC. /s/ Douglas A. Hacker Douglas A. Hacker Senior Vice President - Finance ACCEPTED AND AGREED TO AS OF THE DATE SHOWN ABOVE: THE BOEING COMPANY By: /s/R.C. Nelson Its: Attorney-in-Fact