Volcanic Ash Cloud From Eruption at Mount Rinjani Grounds Planes for Third Day
The volcanic eruption of Mount Rinjani in Indonesia has grounded flights for the third day in a row, The Sydney Morning Herald reported Thursday morning local time. 
Rinjani, on the island of Lombok, has erupted a number of times since Tuesday, and has the potential to continue erupting, according to Indonesia's National Disaster Mitigation Agency.
Ngurah Rai International Airport on the nearby island of Bali, was closed Tuesday and Wednesday because of the risk of flying through the ash cloud in the skies overhead. Ngurah Rai, the main airport on Bali, will be closed until the morning of November 6, according to the airline Garuda Indonesia. Virgin, Jetstar and AirAsia flights were affected by the cloud on Thursday.
According to the BBC, ash can be pulled into jet engines, affecting the internal operations of the engine and fuel flow. 
In July, Indonesia's Mount Raung erupted just 95 miles from the Bali International Airport, affecting air traffic for thousands. One of the most notorious volcano disruptions was in 2010 when the Eyjafjallajökull volcano in Iceland canceled over 100,000 flights, affecting more than 10 million people. 

Based on satellite observations and information from PVMBG, the Darwin VAAC reported that on 31 October an ash plume from Rinjani rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted W before it detached. During 1-3 November ash plumes rose to altitudes of 2.7-4.3 km (9,000-14,000 ft) a.s.l. and drifted as far as 350 km NW, W, WSW, and SW. BNPB reported that on 3 November ash plumes rose as high as 1 km above Barujari Crater and drifted W; ashfall was reported in seven villages in North Lombok. According to a November news article, ash plumes that drifted W and SW caused three airports to close during 3-4 November: Ngurah Rai (150 km WSW) in Bali, Selaparang Airport (40 km WSW) in Lombok, and Blimbingsari Airport (230 km W) in Banyuwangi, East Java. On 4 November BNPB reported that ash plumes rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted W and SW.

Resource: volcano.si.edu, newsweek