In Mode 4A, the aural alert "TOO LOW, GEAR" sounds when the gear is retracted and below what altitude?

In Mode 4A, the "TOO LOW, GEAR" aural alert serves as a crucial safety feature, designed to warn pilots when they are approaching a critical altitude without the landing gear being deployed. This warning activates when the aircraft is below 500 feet above ground level. The purpose of this alert is to ensure that pilots are fully aware of their configuration during the final approach and landing phase. Deploying the landing gear at the appropriate time is essential for achieving a safe landing, and this alert prompts pilots to act if they have not done so.

The selection of 500 feet as the trigger for this alert aligns with industry standards, providing pilots with enough time to respond while still ensuring they remain vigilant during the critical phases of flight where landing gear state is paramount for safety.