What action should you take upon receiving a momentary unsafe indication of the gear while on the ground?

In this scenario, the safest and most appropriate response to a momentary unsafe indication of the landing gear while on the ground is to follow the established procedures that govern such situations. Although transient indications might seem harmless and might not warrant immediate concern, it's crucial to treat them with caution. The transient indication suggests that something may not be functioning as expected, so dismissing it could lead to overlooking a potential safety issue.

Checking the gear handle or following the landing gear emergency checklist are necessary steps, but they should be taken with that transient indication in mind, indicating that the situation may require further investigation. Informing the tower also helps share information but does not directly address the issue at hand.

Following procedural safeguards ensures that the pilot thoroughly evaluates the problem before it escalates into a more severe situation. In aviation, a momentary unsafe gear indication warrants vigilance since safety always takes precedence.