Final answer:
The Inter-Turbine Temperature (ITT) must be under a specific threshold, usually around 120 degrees Celsius, before an air start of an engine can be safely attempted, with the exact value depending on the specific aircraft and engine specifications.
Step-by-step explanation:
The Inter-Turbine Temperature (ITT) must be below a specific value, defined by the aircraft manufacturer, before attempting an air start on a turbine engine. The exact temperature threshold can vary depending on the aircraft type and engine specifications, but it's commonly around or below 120 degrees Celsius.
The key factors to monitor before an air start include ensuring the ITT is within the safe range, there's sufficient altitude for the start procedure, and the battery has enough power to operate the necessary systems during the start.
The Inter-Turbine Temperature (ITT) must be under a specific threshold, usually around 120 degrees Celsius, before an air start of an engine can be safely attempted, with the exact value depending on the specific aircraft and engine specifications.