What action should be taken if lightning is within 25 miles?

The appropriate action when lightning is within 25 miles is to cease all aircraft operations immediately. This standard practice is in place for ensuring the safety of both the aircraft and those on board, as lightning poses a significant risk to flight operations due to the possibility of severe turbulence, electrical interference, and other hazardous conditions associated with thunderstorms.

When lightning is detected in proximity, it serves as a clear indication that the weather conditions may rapidly deteriorate. Maintaining an awareness of potential electrical storms is crucial for pilot safety, as aircraft can be struck by lightning, leading to equipment failures or loss of control.

Resuming normal operations would be highly inadvisable under such conditions, as would carrying alternate destination fuel and continuing operations or returning to the nearest airport without recognizing the immediate dangers present. The best course is to establish a safe distance from the threat posed by the storm and await improved conditions before resuming any flight activities.