From which stages can bleed air be extracted on a GTM?

The extraction of bleed air from a gas turbine engine (GTM) occurs at specific stages, each chosen for its pressure and temperature characteristics which are essential for various systems, such as engine starting, environmental control, and surge protection.

The correct choice identifies stages 3, 5, 8, and 9 as appropriate for bleed air extraction. Stage 3 typically provides air with sufficient pressure for starting the engine and for use in other accessories. Stage 5 often serves systems that require moderate pressure, like cabin air conditioning systems. Stages 8 and 9 can be utilized for engine control systems, which may need bleed air for maintaining optimal performance under varying conditions.

Understanding the function of each stage and its suitability for air extraction allows technicians to effectively use bleed air for operational needs while maintaining engine efficiency and safety. Proper knowledge of these stages enhances overall maintenance procedures and troubleshooting techniques within gas turbine operations.