What does a loss of lens demist indicate when using the CQU-7/P blower?

A loss of lens demist when using the CQU-7/P blower indicates blower failure. The blower is responsible for directing airflow to demist the lenses of the equipment, ensuring visibility for the wearer. When the blower fails, the airflow ceases, leading to fogging up of the lenses due to moisture accumulation.

This situation demonstrates a clear malfunction of the blower system as the expected operation involves consistent airflow to prevent lens misting. Identifying this failure promptly is crucial, as it directly affects the safety and operational capability of aircrew using the equipment. Understanding this mechanism underscores the importance of regular checks and maintenance on the blower system to ensure reliable performance during flight operations.