To prevent damage to the disconnect mechanism, do not hold the IDG switch in for more than:

The correct answer is based on the operational procedures necessary to protect the Integrated Drive Generator (IDG) system on the A320. Holding the IDG switch for more than three seconds can lead to overheating and potential damage to the disconnect mechanism. This is because prolonged activation can cause undue stress and wear on the components involved in the disconnection process.

The IDG is crucial for providing electrical power to the aircraft, and ensuring it operates within safe parameters is essential for maintaining overall aircraft reliability and safety. This timeframe is established in the maintenance and operational manuals to ensure correct procedures are followed, optimizing both safety and the longevity of the equipment during routine operations on the aircraft.

Understanding the limits of maintaining pressure on the IDG switch is vital for pilots and maintenance personnel alike to prevent inadvertent failures that could arise from improper handling. By adhering to this guideline, crews can avoid complications that might otherwise affect the aircraft's electrical systems.