US Airways 2007 Annual Report Download - page 569

For information only an analysis of the Buyer's Manufacturer's Weight Empty, Customer Changes, Operators Items and Operating Weight Empty is
shown in Appendix A to this Letter Agreement.
4 NOISE
4.1 Exterior Noise
For the purpose of the exterior noise guarantees of paragraphs 4.1.1, 4.1.2 and 4.1.3 no thrust BUMP for take-off is assumed.
4.1.1 Noise Certification
The A321-231 powered by V2533-A5 engines at a ** and a ** shall be certified in accordance with the requirements of **
4.1.2**
4.1.3**
4.2 Interior Noise
4.2.1 Interior Noise on Ground
4.2.1.2 Cockpit
During ground operation, with the APU and the air conditioning in normal operation and passenger doors closed, the guaranteed A-weighted Sound
Pressure Level (SPL) and the Speech Interference Level (SIL) in the cockpit shall be as follows:
Guarantee
SPL [dB(A)] **
SIL [dB] **
Noise level shall be measured at the Captain's and First Officer's seat position at head level with normal cockpit air conditioning and ventilation in
operation.
4.2.1.2 Cabin
During ground operation, with the APU and the air conditioning in normal operation and passenger doors open or closed, the guaranteed A-weighted
Sound Pressure Level
** Confidential Treatment Requested.
USA — Amended and Restated Airbus A320 Family Purchase Agreement LA 8F-2 — 13 of 20
EXECUTION PRIVILEGED AND CONFIDENTIAL