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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.