During an airstart attempt, what action should be taken if there is no rise in ITT within a specific time frame?

The correct action in the event of no rise in Interstage Turbine Temperature (ITT) during an airstart attempt is to place the Power Control Lever (PCL) to the off position and abort the start. This is because a lack of ITT rise indicates that the engine has not started successfully, which could be due to a variety of issues including insufficient fuel flow, an ignition system failure, or other mechanical problems.

Failing to abort the start could lead to further complications, such as fuel flooding or potential engine damage, if the situation is not promptly addressed. Aborting the start allows the crew to follow emergency procedures to ensure safety and evaluate the situation appropriately.

Continuing the start attempt without any rise in ITT may lead to unnecessary risks and is not in line with standard operating procedures. Increasing fuel flow or checking all gauges would not resolve the underlying issue causing the lack of ITT rise and could also complicate the recovery process. Therefore, the immediate and correct reaction is to shut down the attempt by moving the PCL to the off position.