Which action is critical for a CDI when discrepancies are found during maintenance?

The critical action for a Collateral Duty Inspector (CDI) when discrepancies are found during maintenance is to initiate corrective actions. This is essential because the primary role of a CDI is to ensure the safety and integrity of the aircraft or system being maintained. When discrepancies are identified, it is crucial not just to document them or notify others; rather, proactive steps must be taken to rectify the issues immediately.

Initiating corrective actions helps to address any potential safety hazards and ensures that maintenance standards are upheld. This can involve coordinating with technicians to rectify problems on the spot, ordering necessary parts, or revising maintenance procedures based on the findings. By taking decisive action, the CDI plays a vital role in maintaining the operational readiness and safety of the aircraft, thereby fulfilling the overarching goals of maintenance protocols.