How long should the AMAD be shut down before checking the oil level?

The correct duration for shutting down the Auxiliary Motor Drive (AMAD) before checking the oil level is 5 minutes. This procedure is essential to ensure an accurate assessment of the oil level, as it allows for any oil that may have been circulated throughout the system during operation to settle back into the sump. By waiting this brief period, the measurement taken will better reflect the actual oil level, providing a reliable indication of whether additional oil is needed or if maintenance is necessary.

In aviation maintenance practices, checking fluid levels shortly after equipment shutdown can lead to misleading readings due to oil being dispersed or still in motion. Therefore, adhering to the established protocols, like the 5-minute wait, ensures that technicians gather accurate information about the system’s condition. This procedure helps maintain the safety and functionality of the aircraft, preventing potential issues that can arise from low oil levels.