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Fact Sheet: Anti-Ice Start Bleed Valve (AISBV)
18 October 2010
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The faulty component is known as the Anti-Ice Start Bleed Valve (AISBV). The valve has a dual function of preventing ice formation and maintaining air pressure at low engine speeds.
This valve is connected to guide vanes which channel air into the engine and ensures that the air flows at the correct angle and velocity over the engine blades for a desired flight condition and engine setting. A corroded valve would lead to malfunctioning of the guide vanes and this in turn would disrupt air flow into the aircraft's engine. This will slow down the rotation of engine blades, which then leads to the engine losing power.
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