Which factors contribute to the FAS landing gear indication?

The correct answer relates to the fact that the FAS (Flaps and Landing Gear Status) indication for landing gear is influenced by the RA (Radio Altimeter) reading being less than 200 feet. This is significant because the FAS system is designed to provide critical information regarding the status of the landing gear as the aircraft approaches the ground. When the RA is below this threshold, it indicates that the aircraft is nearing its touchdown point, allowing the system to enforce safety measures or indicate necessary configurations such as landing gear deployment.

In contrast, other factors like airspeed greater than 150 knots, specific flap settings at 20 or 30, or the landing gear being in transit do not directly relate to the FAS indication criteria for the landing gear status. The focus on RA ensures that the aircraft's proximity to the runway is accurately monitored, thus enhancing safety during the critical phases of landing.