Definition
Radio interference caused by an electrical charge that builds up on an aircraft as it flies through precipitation, dust, ice crystals, or other airborne particles. When the accumulated charge discharges from the airframe, it generates electrical noise that disrupts radio reception, particularly on low-frequency and ADF equipment.
Plain English
Static and noise on the radios caused by the airplane picking up an electrical charge while flying through rain, snow, dust, or ice crystals, then shedding that charge into the air.
Context Anchor
Seen in instrument flying and radio reception discussions, especially when flying in clouds, snow, rain, or dusty air.
Derivation
The 'P' stands for precipitation. The term was coined because the effect was first noticed when aircraft flew through rain and snow, though it occurs with any airborne particles that can transfer charge to the airframe.
Why Pilots Care
Severe P-static can block all radio communications and navigation signals, forcing pilots to exit the weather or rely on backup procedures.
Grounding Statement
Picture an airplane flying through snow or ice crystals while tiny electric charges build up and release, creating crackle in the headset.
Intuition Check
Do not read “static” here as simply “not moving.” In P-static, it means built-up electrical charge that interferes with radio reception.
Example Sentence 1
While descending through a snow shower, the crew heard heavy crackling on the ADF and recognized it as P-static.
Example Sentence 2
The static wicks installed on the wings and tail help dissipate the charge and reduce P-static interference.