What is the purpose of the fuel boost pump in the Pilatus PC-12 NG?

The purpose of the fuel boost pump in the Pilatus PC-12 NG is to ensure sufficient fuel delivery during engine start and low fuel pressure situations. This pump plays a critical role in the aircraft's fuel system, particularly when the engine is starting, as it provides the necessary fuel pressure for the fuel injectors. At low fuel pressure conditions, the boost pump maintains an adequate supply of fuel to ensure that the engine operates smoothly and efficiently.

In addition to its function during engine start, the boost pump is also important during critical flight phases where fuel demand might exceed the normal supply, preventing issues such as fuel starvation. This reliability in fuel delivery is crucial for maintaining engine performance and safety during various flight conditions.