The primary technical resource matching your request is the official Pratt & Whitney publication titled The Aircraft Gas Turbine Engine and Its Operation
Before an aircraft is cleared to return to service, a mandatory ground test is conducted in an open run-up area or test cell. Technicians verify starting parameters, check for fuel or oil leaks at operational pressures, evaluate variable stator vane scheduling, and ensure that transient engine responses perfectly match the cockpit throttle commands. The primary technical resource matching your request is
Modern Pratt & Whitney commercial engines are high-bypass turbofans. A massive front fan pushes a small amount of air through the engine core (for combustion) and a massive amount of air around the core (bypass air). This bypass air provides up to 80-90% of the total thrust in modern engines, dramatically increasing fuel efficiency and reducing noise. The Compressor (LPC and HPC) A massive front fan pushes a small amount
Save the file to a dedicated directory (e.g., C:/Aviation_Manuals/Pratt_Whitney/ ). evaluate variable stator vane scheduling