From the very first with current production facility, HAL could have come out with rate of 1 LCA per 3 month. So in that matter they are right on schedule with a single production line.The SP being delivered till now 3 were not on schedule from the very beginning.
So saying that 4th one is on schedule cannot be true.
FOC is delayed due to all the parties involved and i agree that IAF may come up with one thing or another just to stall the FOC.
When I asked about HAL I meant from the point of view of upgraded Tejas only.
Upgraded Tejas would only come out after 20 IOC standard and 20 FOC standard Tejas delivered. So give or take it would be by 2021 only. Work is on progress with RADAR. Moreover HAL is also working on NLCA.