The ATSB is investigating multiple fuel contamination reports, with the most recent occurrences in Cloncurry, Queensland, in September and October, 2016.
During routine inspections, flight crew detected foreign debris in fuel drums. Subsequently, additional drums were inspected and further contamination was discovered.
As part of the investigation, the ATSB will attempt to determine the origin of the contamination in order to prevent reoccurrence in the future.
A report will be released within several months.