US Airways 2007 Annual Report Download - page 894

2 SPECIFICATION
2.1 Specification Documents
2.1.1 The Aircraft will be manufactured in accordance with the applicable Specification.
The applicable Standard Specification will supersede the applicable ADD at no additional cost to the Buyer and the applicable airframe will be
manufactured in accordance with the applicable Standard Specification, as may already have been modified or varied by the ADD specification changes
contemplated in Exhibit B-1.B for the Aircraft. It is understood that, subject to the Seller's certification, industrial and commercial constraints, some
equipment currently set forth in the ADD may be replaced by equipment with equivalent functions, but that in no event will the Standard Specification of
the Aircraft contain any equipment not having functions at least equivalent to those set forth in the applicable ADD.
The Seller agrees to promptly inform the Buyer of any applicable Standard Specification evolutions that the Seller is contemplating offering to other
airlines for incorporation in the Aircraft.
Without prejudice to the foregoing, the Seller is currently considering turning certain items that are Buyer Furnished Equipment in the ADD into Seller
Furnished Equipment items in the applicable Standard Specification and the parties agree that such Buyer Furnished Equipment items will be excluded
from the preceding paragraph and will be chargeable to the Buyer should they become Seller Furnished Equipment; provided, however, that items
transferred from Buyer Furnished Equipment to Seller Furnished Equipment will be of equivalent function and form and at no additional charge to the
Buyer as compared to the amount that the Buyer would have paid for the original Buyer Furnished Equipment.
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.
USA — Amended and Restated Airbus A350 XWB Purchase Agreement PA – 16 of 109
EXECUTION PRIVILEGED AND CONFIDENTIAL