An-32 transport aircraft of the Indian Air Force (IAF) flew with blended bio-jet fuel produced from Jatropha oil, unlocking the possibility of gradually expanding it to the entire service at some point. This has the dual benefit of reducing the carbon footprint as well as usage of fossil fuels. It was flown by highly qualified test pilots from the Aircraft and System Testing Establishment (ASTE). The IAF intended to fly the An-32 with 10% bio-jet fuel at the Republic Day flypast on January 26, 2019. This bio-jet fuel technology was developed by the Indian Institute of Petroleum (IIP) under the Council of Scientific and Industrial Research (CSIR) in 2009 and tested between 2011 and 2013.