Solder flux residues may be both conductive and corrosive, which can result in what issue?

Solder flux residues can create conductive and corrosive environments, which significantly increase the risk of current leakage paths in electronic circuits. When flux residues are left on circuit boards, they can lead to unintended electrical conduction between different components or traces. This situation can cause current to follow paths that are not designed to carry it, ultimately resulting in malfunctioning components, unreliable performance, or even damage to the equipment.

While other answers like power surges, signal loss, or heat buildup can be related to electrical issues in circuits, they do not directly stem from the presence of solder flux residues in the same way that current leakage paths do. Current leakage is a more immediate consequence of conductive and corrosive residues, leading to potential circuit failures or shorts that can cause further complications in avionics systems.