What is one of the first engine instrument indications of a successful start of a turbine engine?

One of the first engine instrument indications of a successful start of a turbine engine is a rise in exhaust gas temperature (EGT). During the starting process, fuel is introduced into the combustion chamber, and as the engine initiates combustion, the temperature of the exhaust gases increases. This temperature rise is a key indication that the fuel is igniting and the engine is producing power.

Monitoring EGT is crucial because it helps ensure that the combustion process is occurring properly. A significant increase in temperature is generally expected shortly after ignition, indicating a successful engine start. Additionally, EGT provides insights into engine performance and efficiency throughout the operating range, making it an essential parameter in both starting and overall engine operation.

Other parameters, such as oil pressure or fuel flow, may also offer indications of engine start; however, the rise in exhaust gas temperature is specifically tied to the combustion event that confirms the engine is starting as intended.