What should be done if the landing gear indicator lights do not illuminate?

The correct approach when the landing gear indicator lights do not illuminate is to execute the emergency landing gear extension procedure. This procedure is critical because it addresses the potential failure of the landing gear to deploy fully, which can result in an unsafe landing. The emergency procedure typically involves specific steps to manually lower the landing gear, ensuring that it is locked in place before landing.

Understanding the significance of the emergency landing gear extension procedure underscores the importance of having a reliable landing gear, as landing without fully extended gear can lead to catastrophic failures. By following the emergency procedure, the pilot can confirm the gear is properly extended or take additional actions as needed to ensure a safe landing.

The other choices do not directly address the critical issue of ensuring the landing gear is safe for landing. Increasing airspeed might not aid the situation; it could complicate the landing process. Contacting air traffic control, while generally important for communication, does not resolve the technical problem and could delay necessary actions. Landing as soon as possible is often a good choice but should follow the confirmation that the landing gear is secure through the emergency procedure.