Light Combat Aircraft Tejas or simply as we know LCA Tejas is the second in line indigenously produced fighter aircraft by Hindustan Aeronautics Limited after the HAL Marut.

Now when ever we mark any aircraft about its component and its value, we term it by two;

1. By Value
2. By Line Replaceable Units/LRUs
3. Lower Line Replaceable Units/LLRU

So LCA Tejas is

• 59.7% indigenous by Value
• And 75.5% bu LRU and LLRUs

Now what is Line Replaceable Units. These are the essential support item which is removed and replaced at the field level to restore the end item to an operational ready condition. For better understanding let us take the example of the AC-130 Gunship.

Now as I said Line Replaceable Units and Lower Line Replaceable Units are the second things which needs to be accounted. So in LCA Tejas there are in total 344 LRUs/LLRUs involved.

Out of which 210 LRUs/LLRUs are manufactured by our own country in the different PSUs, institutes and factories.

And the rest 134 LRU/LLRUs are manufactured by foreign suppliers and are being imported. Out of which 42 units will be soon produced by India itself.

Initially the propulsion system or the engine chosen was GTRE GTX-35VS Kaveri developed by GTRE under DRDO.

But some how this didn’t fit the way it should be, thus leading HAL to go for General Electric F404 engine.

If this had worked the ratio or percentage of indigenous products with Tejas would have been much more.