US Airways 2007 Annual Report Download - page 600

2 SPECIFICATION
2.1 Specification Documents
2.1.1 The Aircraft will be manufactured in accordance with the applicable Specification.
2.1.2 Specification Change Notice
The Specification may be amended in writing by the Buyer and the Seller by a Specification Change Notice in substantially the form set out in
Exhibit B-1 (each, an "SCN"). An SCN will set out the SCN's effectivity and the particular change to be made to the Specification and the effect, if
any, of such change on design, performance, weight, Scheduled Delivery Month of the Aircraft affected thereby, interchangeability or replaceability
requirements of the Specification and text of the Specification. An SCN may result in an adjustment of the Base Price of the Aircraft, which adjustment,
if any, will be specified in the SCN. SCNs will not be binding on either party until signed by persons duly authorized by the Buyer and the Seller, but
upon being so signed, will constitute amendments to this Agreement.
2.1.3 Manufacturer Specification Change Notice
The Specification may also be amended in writing by the Seller by a Manufacturer's Specification Change Notice. Each MSCN will be substantially in
the form set out in Exhibit B-2 and will set out the MSCN's effectivity and the particular change to be made to the Specification and the effect, if any, of
such change on design, performance, weight, Scheduled Delivery Month of the Aircraft affected thereby, interchangeability or replaceability
requirements of the Specification and text of the Specification. MSCNs will be subject to the Buyer's acceptance, except in the case of Development
Changes (as defined below) or changes resulting from Airworthiness Directives, government-mandated regulations arising after the date of the
Specification or equipment obsolescence.
2.1.4 Development Changes
As stated in Clause 2.1.3, changes may be made by the Seller without the Buyer's consent when changes to the Aircraft do not adversely affect price,
Scheduled Delivery Month, weight of the Aircraft affected thereby, ** interchangeability requirements or replaceability requirements of the
Specifications of the Aircraft affected thereby are deemed by the Seller to be necessary to improve the Aircraft affected thereby, prevent delay or ensure
compliance with this Agreement ("Development Changes"). Development Changes will be made by either an MSCN or a manufacturer's information
document prior to Delivery of the relevant Aircraft.
USA — Airbus A330 Purchase Agreement
EXECUTION
**Confidential Treatment Requested.
PA — 10 of 95
PRIVILEGED AND CONFIDENTIAL