What is the total limitation for running the engines on the ground in a 24-hour period?

The total limitation for running the engines on the ground in a 24-hour period for the King Air 350 is 120 minutes. This limitation is established to ensure the engines do not overheat and to maintain overall engine health. Prolonged engine running on the ground can lead to increased exhaust gas temperature (EGT) and can affect other parameters critical for engine maintenance and operational integrity. Therefore, adhering to the specific time limit for ground operations helps mitigate undue stress on the engines while promoting safety and reliability during flight operations.