The Scoop on P-Static from VIP Avionics
VIP Avionics, Inc. will provide useful information on a variety of avionics topics. This month, we are discussing a sticky, and often, misdiagnosed problem: Precipitation Static (P-Static)
What is it?
Droplets of water give a passing aircraft a negative charge. This can happen in rain, snow or clouds. There can be a significant negative voltage which will trigger a discharge creating visible light (St. Elmo’s Fire).
What problems can P-Static cause?
The electrical discharge can interfere with aircraft systems. This can result in poor reception, navigation interference and/or audio noise.
What aircraft issues can cause P-Static problems?
Missing or damaged static wicks
Missing or damaged bonding straps
Improper bonding of antenna
Improper bonding of aircraft components, including radomes and gear doors
How can you prevent P-Static?
Ensure static wicks and bonding straps are properly installed. Check for proper bonding of antennas and all airframe components.