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Fire prevention – bays or zones:
To prevent the spread of a fire within an aircraft/engine nacelle, it is divided up into sections or zones, each being separated by a fireproof bulkhead. These are made of titanium or stainless steel and prevent the fire from spreading into adjacent areas.The engine nacelle is split into two sections (UK).
Zone 1. The cool section contains the:
• Fan• Compressor• Fuel Control• Air system supply• Hydraulic pump• AC generator• Bleed valves and Variable Inlet Guide Vane (VIGV) systems
Zone 2. The hot section contains the:
• Fuel burners• Combustion chamber• Turbines LP & HP• Exhaust
All fire zones are sealed from adjacent areas. Fire resistant rubber seals are fitted to the edges of all doors, panels and bulkhead fittings to prevent fire spreading. Each of the zones will be ventilated to prevent the build up gases or pressure and to cool the outer casing of the engine and accessories. Fire break in panels will be built in to allow the use of external fire extinguishers, these may also operate as blow out doors to prevent pressure build up in the zone.
Cathode ray tube (crt): Displays of this type, which are based on the electron beam scanning technique, have been used in aircraft for many years. They were first used to disp
Depreciation Calculation Two most popular methods of charging depreciation are: straight line and diminishing balance or written-down value (WDV) methods. For reporting to the sha
A gating system is usually made up of : (i) Pouring basin (ii) Sprue well (iii) Ru
Riveting is a fixed fastening procedure in which the end of the metal pin is pressed over or spread out by hammering operation. Wrought iron and steel are used for the riveting an
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Fuel system inhibiting. The fuel used in turbine engines usually contains a small quantity of water which, if left in the system, could cause corrosion. All the fuel should th
Interior noise is basically airborne or structure-borne. The excitation sources of vibratation and noise from engines can be divided as mechanical, combustion, and flow sources.
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