Jakarta20 flights cancelled, skies clear, runway open.

Ash from Indonesia’s Anak Krakatau, not weather, grounded a whole air corridor.

Ash melts inside a jet engine’s 1,400°C core, then hardens to glass on the turbine blades behind it, choking airflow.

Soekarno-Hatta airport stays shut until 2:30pm local time as the eruption’s status remains provisional.

Sources: The Star, Malay Mail, Free Malaysia Today