What is the action required if there is no positive oil pressure indication within 10 seconds after the engine start?

If there is no positive oil pressure indication within 10 seconds after the engine start, the appropriate action is to manually abort the start. This is critical because oil pressure is essential for the proper functioning of the engine. A lack of oil pressure could indicate a serious issue, such as insufficient oil supply or a malfunctioning oil pump, which can lead to catastrophic engine damage.

By aborting the start, you minimize the risk of engine damage and allow for troubleshooting or maintenance to address the underlying problem. Ensuring a proper oil pressure reading is crucial for safe operation, making it imperative to take immediate corrective action following an abnormal indication like this. Thus, manually aborting the start is a necessary safety measure to protect both the aircraft and its crew.