What is one of the consequences of volcanic ash on runways?

Volcanic ash can have several harmful effects on runway conditions, significantly affecting the safety of aircraft operations. The correct answer highlights that volcanic ash can be detrimental to braking action. When ash settles on runways, it can create a slippery surface that reduces the friction required for effective braking. This increase in runway contamination can lead to longer stopping distances, making it challenging for pilots to safely land and slow down their aircraft.

Moreover, volcanic ash can be abrasive and may cause additional hazards such as damage to aircraft systems and engines. Runway conditions with ash can lead to increased risks of skidding or hydroplaning, further complicating runway safety and aircraft handling during landings and takeoffs. Thus, the adverse effects of volcanic ash on braking action are significant, highlighting the importance of monitoring and maintaining safe runway conditions post-eruption.