US Airways 2007 Annual Report Download - page 1127

8.6 Compliance with the APU noise and interior noise guarantees will be demonstrated with reference to noise surveys conducted on one (or more, at the
Seller's discretion) A350-900 XWB Aircraft of an acoustically equivalent standard to those A350-900 XWB Aircraft purchased by the Buyer.
8.7 Data derived from flight tests and noise surveys will be adjusted as required using conventional methods of correction, interpolation or extrapolation in
accordance with established aeronautical practices to show compliance with the Guarantees.
8.8 Compliance with the Guarantees is not contingent on engine performance defined in the engine manufacturer's specification.
8.9 The Seller undertakes to furnish the Buyer with a report or reports demonstrating compliance with the Guarantees at, or as soon as possible after, the
delivery of each of the A350-900 XWB Aircraft.
9 ADJUSTMENT OF GUARANTEES
9.1 In the event of any change to any law, governmental regulation or requirement or interpretation thereof ("rule change") by any governmental agency
made subsequent to the date of the Agreement and such rule change affects the Aircraft configuration or performance or both required to obtain
certification the Guarantees will be appropriately modified to reflect the effect of any such change.
9.2 The Guarantees apply to the Aircraft as described in paragraph 1 of this Letter Agreement and may be adjusted in the event of:
i) Any further configuration change which is the subject of a SCN
ii) Variation in actual weights of items defined in Section 13-10 of the Specification
iii) Changes required to obtain certification that cause modifications to the performance or weight of the A350-900 XWB Aircraft
10 EXCLUSIVE GUARANTEES
The Guarantees are exclusive and are provided in lieu of any and all other performance and weight guarantees of any nature which may be stated,
referenced or incorporated in the Specification or any other document.
** Confidential Treatment Requested.
USA – Amended and Restated Airbus A350 XWB Purchase Agreement LA 8-2.A – 20 of 23
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