Final answer:
The IVHMU captures various data points, including cockpit noise, vibration, and flight parameters, when the event switch is pushed in.
Step-by-step explanation:
When the event switch is pushed in, a momentary ground is applied to the IVHMU (Integrated Vehicle Health Management Unit) and upon receiving the ground signal, the IVHMU captures various data points, including cockpit noise, vibration, and flight parameters. This data helps to monitor the health and performance of the aircraft and can be used for diagnostics and maintenance purposes.