US Airways 2007 Annual Report Download - page 808

5.2.2.2 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
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.
6 GUARANTEE CONDITIONS
6.1 The performance and noise certification requirements for the Aircraft, except where otherwise noted, will be as stated in Section 02 of the
Specification.
6.2 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.
6.2.1 When establishing take-off and second segment performance no air will be bled from the engines for cabin air conditioning or anti-icing.
6.3 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 Specification. Cabin air conditioning
management during performance demonstration as described in Subparagraph 8.3 below may be such as to optimise the Aircraft performance
while meeting the normal air conditioning requirements defined above. Unless otherwise stated no air will be bled from the engines for anti-icing.
Cruise performance at ** and above is based on an optimized centre of gravity position.
6.4 The engines will be operated using not more than the engine manufacturer's maximum recommended outputs for take-off, maximum go-round,
maximum continuous, maximum climb and cruise for normal operation unless otherwise stated.
LA 8E — 19 of 24
USA — Airbus A330 Purchase Agreement
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