US Airways 2007 Annual Report Download - page 500

6.3 below may be such as to optimize the Aircraft performance while meeting **. Unless otherwise stated **.
5.6 The engines will be operated using not more than **.
5.7 Where applicable the Guarantees assume the use of an approved fuel having a density of **.
6 GUARANTEE COMPLIANCE
6.1 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.
6.2 Compliance with the take-off, second segment, approach climb, en-route one engine inoperative climb, landing and external noise elements of the
Guarantees will be demonstrated with reference to the approved flight manual.
6.3 Compliance with those parts of the Guarantees defined in Paragraphs 1 and 2 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) A321-200
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.
** CONFIDENTIAL TREATMENT REQUESTED.
USA — Amended and Restated Airbus A320 Family Purchase Agreement LA 8D-2 — 9 of 13
EXECUTION PRIVILEGED AND CONFIDENTIAL