Overhaul requirement of transport and helicopter fleet of the IAF necessitated setting up of No. 3 Base Repair Depot at Chandigarh on 20 Aug 1962. Group Captain TMJ Kriplani, the Depot’s first Commanding Officer, set up the requisite facilities with Russian collaboration and commenced the first overhaul of the IL-14 transport aircraft and the Mi-4 helicopter. With induction of new helicopters in IAF, the Depot graduated to overhaul of Mi-8 and Mi-17 helicopters. In fact, the Depot has today become the knowledge base for all Russian helicopters, and has undertaken number of tasks like life extension of Mi-25 helicopters, repair of Mi-26 helicopters and upgrade of Mi-35 helicopters. 31 ED merged into 3 BRD.