What is the purpose of drain grommets in aircraft fabric?

The purpose of drain grommets in aircraft fabric is to allow moisture to escape and provide ventilation. These grommets are essential in preventing water accumulation between the fabric and the underlying structure, which could lead to issues such as rot or corrosion. By facilitating drainage, they help maintain the integrity of the aircraft’s fabric covering and ensure that any trapped moisture can exit, thereby preserving the performance and longevity of the aircraft. The proper ventilation achieved by drain grommets also contributes to the overall safety and efficiency of the aircraft, preventing issues related to moisture buildup.