US Airways 2007 Annual Report Download - page 1104

made at the prevailing ambient temperature with the air conditioning packs controlled to approximate air conditioning machinery rotational speed
appropriate to an ambient temperature of 25C.
8 GUARANTEE COMPLIANCE
8.1 Compliance with the Guarantees will be demonstrated using operating procedures and limitations in accordance with those defined by the certifying
Airworthiness Authority and by the Seller unless otherwise stated.
8.2 Compliance with the take-off, second segment, en-route one engine inoperative, approach climb and landing elements of the Guarantees will be
demonstrated with reference to the approved Flight Manual.
8.3 Compliance with those parts of the Guarantees defined in paragraph 2 and 3 above not covered by the requirements of the certifying Airworthiness
Authority will be demonstrated by calculation based on data obtained during flight tests conducted on one (or more, at the Seller's discretion) aircraft of the
same aerodynamic configuration as the Aircraft and incorporated in the In-Flight Performance Program and data bases (the "IFP") appropriate to the
Aircraft.
8.4 Compliance with the Structure Usable Load guarantee defined in Paragraph 4 will be demonstrated with reference to a weight compliance report.
8.5 The approved A350-800 XWB Aircraft flight manual will be used to demonstrate compliance with the guarantees of certification noise levels.
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) A350-800 XWB Aircraft of an acoustically equivalent standard to those A350-800 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 A350-800 XWB Aircraft.
** Confidential Treatment Requested.
USA — Amended and Restated Airbus A350 XWB Purchase Agreement
EXECUTION
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PRIVILEGED AND CONFIDENTIAL