Which issues can result from microbial growth in a jet fuel tank if not corrected?

Microbial growth in a jet fuel tank can lead to significant operational issues if not addressed. One of the critical problems associated with this is interference with fuel quantity indicators. When microbes proliferate, they can produce a biofilm or other by-products that accumulate in the fuel system, potentially causing blockages or inaccuracies in fuel measurement devices. Accurate fuel quantity indicators are essential for flight safety and efficient operation, making this a serious concern.

Additionally, electrolytic corrosive action can occur in a metal tank. Microbial contamination can promote conditions conducive to galvanic corrosion, especially in an aqueous environment where microbes thrive. This corrosion can compromise the integrity of the tank, leading to leaks or catastrophic failures. The presence of moisture, which is often escalated by microbial activity, creates an environment where corrosion can flourish.

While other options mention various impacts associated with microbial growth, the combination of interference with fuel quantity indicators and the corrosion in metal tanks directly addresses the most common and hazardous consequences observed in aviation fuel systems. Thus, this option accurately captures the risks involved with unchecked microbial growth in jet fuel tanks.