How long after shutdown do you check the oil servicing on the MGB for the hot side?

The correct time frame for checking the oil servicing on the MGB (Main Gear Box) for the hot side after an aircraft shutdown is indeed between 1/2 to 2 hours. This period allows the oil to settle thermally and provides a more accurate measurement since oil in a hot gearbox may still be in a temporary state of suspension or may have experienced changes in level due to thermal expansion.

Checking the oil too soon after shutdown, such as immediately or within 15-30 minutes, may lead to inaccurate readings, as residual heat can affect the oil position and volume. Similarly, waiting too long, such as 2-4 hours or 4-6 hours, might not give a precise indication of the oil level needed for normal operation, as the oil could drain away from the inspection point if left for too long. Therefore, the specified timeframe of 1/2 to 2 hours strikes a balance, providing a reliable reading for proper oil servicing in the MGB.