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US Airways 2007 Annual Report Download - page 1141

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Noise levels will be measured at the Captain's and First Officer's seat position at head level with normal cockpit air conditioning and ventilation in

operation.

5.2.1.2 Cabin Noise

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) will not exceed the following values, considering leather seats are part of the cabin lay-

out.

Guarantee

(a 2 dB extra is accounted for leather seats installation)

SPL dB(A) **

SIL dB **

Noise levels will be measured at a height of 40 inches above the passenger compartment floor on the aisle center lines in the passenger seated area.

Effects on noise of Buyer furnished equipment and installations by or on behalf of the Buyer are not covered by this guarantee. The noise levels are

provided for leather seats.

6 EMISSIONS (for information only)

Seller position is that the Engine Manufacturer directly provides BUYER with an aircraft engine emissions guarantee. Consequently the following is a

reminder (for information only) of the regulations the engine will have to comply with during its certification.

The RR Trent XWB engines will have to meet the emission levels for Smoke as defined in ICAO Annex 16, Volume II Aircraft Engine Emissions',

Second Edition effective 11th November 1993, section 2.2.2.

The RR Trent XWB engines will have to meet the emission levels for Unburned Hydrocarbons (HC), Carbon Monoxide (CO) as defined in ICAO

Annex 16, Volume II Aircraft Engine Emissions', Second Edition effective 11th November 1993, section 2.3.2.

The RR Trent XWB engines will have to meet the emission levels for Oxides of Nitrogen (NOx) as specified in the ICAO Annex 16, Volume II

Aircraft Engine Emissions', Second Edition effective 11th November 1993, Chapter 2.3.2d (CAEP/6).

Engine emission data will be obtained and evaluated in accordance with the requirements of the ICAO Annex 16, Volume II Aircraft Engine

Emissions', Second Edition effective 11th November 1993.

** Confidential Treatment Requested.

USA – Amended and Restated A350 Purchase Agreement LA 8-2.B – 11 of 16

EXECUTION PRIVILEGED AND CONFIDENTIAL