US Airways 2007 Annual Report Download - page 766

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 ** 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 a height of ** above the passenger compartment floor on the aisle center lines in the passenger seated area.
5 GUARANTEE CONDITIONS
5.1 The performance and noise certification requirements for the A330-200 Aircraft, except where otherwise noted, will be as stated in Section 02 of the
Specification.
5.2 For the determination of FAR take-off and landing performance a hard dry level runway surface with no runway strength limitations, no line-up
allowances, no obstacles, zero wind, atmosphere according to ISA, except as otherwise noted, and the use of centre of gravity positions, speed brakes,
flaps, landing gear and engines in the conditions liable to provide the best results will be assumed.
5.2.1 When establishing take-off and second segment performance no air will be bled from the engines for cabin air conditioning or anti-icing.
5.3 Climb, cruise and descent performance associated with the Guarantees will include allowances for normal electrical load and for normal engine air
bleed and power extraction associated with cabin differential pressure as defined in Section 21-30.31 of the
LA 8A — 4 of 8
USA- Airbus A330 Purchase Agreement
EXECUTION PRIVILEGED AND CONFIDENTIAL
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