Aircraft that have full stopped during a lightning call must remain where until cleared?

The correct answer highlights the protocol for aircraft during a lightning call, emphasizing safety. When an aircraft has come to a full stop in response to a lightning warning, it must remain at the first available location until cleared by air traffic control. This ensures that the aircraft is safely positioned away from the runway and does not interfere with other operations or emergency procedures that might be necessary during the lightning event.

Remaining at the first available location allows for quick access to a safe area while ensuring the ground crew can conduct any required inspections or weather assessments without the risk of the aircraft being in a vulnerable position. This approach aligns with standard safety protocols to protect both personnel and equipment during adverse weather conditions.

In contrast, staying on the runway or in the holding pattern could pose safety risks, preventing other aircraft from landing or taking off, while remaining in the immediate vicinity of the taxiway could obstruct ground operations. Thus, the necessity to clear the aircraft to a more secure and less obstructive area is fundamental during such lightning events.