Most aircraft have vacuum powered gyro instruments. Many aircraft have backup vacuum sources that can be employed in the event of a vacuum pump failure. However, the one thing missing has been the ability to recognize a vacuum failure soon enough to transition to the primarypanel, or energize the backup vacuum source and stay out of trouble. A gyro instrument can start giving false information in less than one minute, and it is important that the pilot become instantly aware of a vacuum loss. The Volt & Vac Alert monitors instrument vacuum and electrical voltage. Should either fall below set values, the system will provide an instantly recognizable voice warning directly in the pilots headset, and then flash a light positioned within the normal gyro scan area, providing him with instant recognition of a problem. The Volt & Vac Alert is STC - PMA approved.