And, most strikingly, Mr Trump said they were “paving the way” to supply India with the F -35, which is currently restricted to American allies. That only intensified manoeuvring among military officials and arms-makers in Bangalore.

New Delhi's decision on next-generation advanced stealth fighters will have to factor in military data leak concerns, analysts say India faces a decision that could reshape its defence future. Will it embrace the United States' offer to sell its most advanced F-35 stealth fighters,

The contract will “improve readiness” and cut costs for more than 400 F119 engines that have flown more than 900,000 hours, according to Pratt & Whitney.

Pratt & Whitney has been awarded a contract worth up to $1.5bn, to maintain the F119 engines for the US Air Force's F-22 Raptor fighter jets.