US Airways 2007 Annual Report Download - page 529

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 (SPL) and the Speech Interference Level (SIL) in the passenger seated area shall be as follows:
Guarantee
Passenger seated area SPL[dB(A)] **
SIL [dB] **
4.2.2 Interior Noise in Flight
4.2.2.1 Cockpit
At a pressure altitude of ** and a true Mach number of **in straight and level flight in still air under ISA conditions, the guaranteed A-weighted Sound
Pressure Level (SPL) and the Speech Interference Level (SIL) shall be as follows:
Guarantee
SPL [dB(A)] **
SIL [dB] **
Noise levels 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.
4.2.2.2 Cabin
At a pressure altitude of ** and a true Mach number of ** in straight and level flight in still air under ISA conditions, the guaranteed A-weighted Sound
Pressure Level (SPL) and the Speech Interference Level (SIL) shall be as follows:
Guarantee
Front 40% of passenger seated area SPL[dB(A)] **
SIL [dB] **
Remaining 60 % of passenger seated area SPL[dB(A)] **
SIL [dB] **
** Confidential Treatment Requested.
USA — Amended and Restated Airbus A320 Family Purchase Agreement
EXECUTION
LA 8E-2 — 11 of 16
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