IAF Mi-17V5 helicopters drop 12,000 litres of water to fight massive forest fire in Arunachal’s Lohit Valley: WATCH … Force (IAF), with Mi-17V5 helicopters deployed to douse flames in … plains.According to the IAF, helicopters released nearly 12,000 litres … Lohit Valley. #IAF Mi-17V5 helicopters dropped 12,000 litres of …