Pinch your nose shut, close your mouth, and gently blow as if you’re blowing your nose. Don't blow too hard, as this can damage your eardrum.
When a fault occurs, massive current (potentially thousands of amps) surges through the circuit. The earth cable has to handle this current for the split second it takes the circuit breaker to trip. ears popping after flightearth cable size calculation
If you are flying with a cold or sinus congestion, the pressure differential can be severe. Using a decongestant nasal spray 30 minutes before descent can save you a lot of pain. Pinch your nose shut, close your mouth, and