Indian Navy is also facing problems over the push to use home-grown equipment.
Prime Minister Narendra Modi's push to boost domestic manufacturing of defense systems is leaving India vulnerable to persistent threats from China and Pakistan, according to officials with knowledge of the matter.
India's air force, army, and navy can no longer import some critical weapons systems to replace aging ones, the officials said. That risks leaving India critically short of helicopters by 2026 and with a shortfall of hundreds of fighter jets by 2030, they said.
Shortly after sweeping to power in 2014, PM Modi unveiled his "Make in India" policy to build everything from mobile phones to fighter jets in India to generate jobs and reduce outflows of foreign exchange. But eight years later, the world's biggest importer of military hardware still doesn't manufacture enough weapons locally to meet its needs -- and government rules are blocking imports.
PM Modi's program mandates between 30% to 60% of home-made components, depending on the nature of the military purchase or where it's purchased from. There were no such caps earlier and India used a system of plowing back a certain percentage of the cost of the purchase into domestic manufacturing.
As things stand, India's military readiness is set to further deteriorate just as it faces greater risks from Pakistan and China, which have soldiers deployed toe-to-toe against troops from India along their Himalayan border following deadly clashes in 2020. The weaker air force in particular means India will need twice the number of soldiers on the ground to deter aggression along the Chinese border, one person said.
Bloomberg spoke to multiple officials for this story across the three services in India. They asked not to be identified to discuss sensitive issues.
India's Ministry of Defence did not respond to an email seeking comments.
While India's military has increased local purchases of some defense items, the country doesn't yet produce complex platforms like diesel-electric submarines and twin-engine fighters. Plans to buy fighters from foreign manufacturers were shelved because the Modi government wants the air force to opt for indigenously made single-engine fighters, which are in short supply, as well as twin-engine fighter planes that the country doesn't yet have in production.
The situation with the air force is particularly dire. By 2030, the Indian Air Force may be left with less than 30 fighter squadrons, well below the 42 the military says it needs to adequately protect borders with both China and Pakistan, officials said. Between now and then, the air force will be forced to ground about half-a-dozen squadrons -- each including 16 to 18 fighter jets -- that will reach the end of their flying life, one official said.
The Bengaluru-based state-owned defense manufacturer Hindustan Aeronautics Limited can only produce eight indigenous Tejas fighters each year, officials said, or roughly half a squadron. The company plans to double manufacturing capacity by 2026, they added, but delays are possible due to supply-chain disruptions caused by Russia's war in Ukraine.
Helicopters are another problem. The air force, army, and navy still depend on light helicopters designed and developed in France more than half a century ago and inducted in the 1970s. Almost 80% of India's fleet of choppers has already outlived their lifespan of 30 years, a defense ministry official said.
Most of the army's fleet of single-engine choppers will have to be grounded by 2026 even though domestically made light helicopters aren't likely to be ready before the end of 2030, one defense official said. A plan to manufacture Russian Kamov-226T helicopters hasn't materialized yet because of disagreements over costs and the amount of indigenous components to be included.
Last year, the Indian Army advised the Defense Ministry to ignore PM Modi's import bans and buy a few dozen much-needed utility helicopters, an official said. Both the air force and army are also making contingency plans and extending the lives of the existing aging platforms, said officials.
Flying the old helicopters is costing lives. According to records with the Parliament until last December, 31 soldiers were killed and another 19 injured in accidents involving military helicopters since 2017.
The navy is also facing problems over the push to use home-grown equipment. India's submarine fleet is dependent on a limited number of heavyweight torpedoes it had bought four decades ago.
The Defence and Development Research Organisation (DRDO) is working on a plan to make submarine launched, heavy-weight torpedoes but there is no specific timeline for when they will be ready for use.
PM Modi's import substitution plans don't take into account the fact that developing world-class weapon systems requires billions of dollars in investment and years of research, said Rahul Bedi, a New Delhi-based independent defense analyst. Moreover, even Indian defense platforms such as light combat aircraft or tanks have roughly 50% imported components, he added.
"Make in India for defense isn't thought through properly," Mr Bedi said. "It is a good slogan, beyond that there isn't much to show as yet."
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)