India built the Tejas. America delivered the engine late.

GE engine delays pushed Tejas Mk1A handovers back by nearly a year. HAL said it could deliver 16 to 24 aircraft in the next financial year if engine supplies stabilised, an important “if” for an air force operating 31 fighter squadrons against a target of 42. India controlled the airframe programme, but not the F404 production line.

A domestically built fighter without its certified foreign engine is not almost sovereign. It is almost an aircraft.

The obvious asset is what the buyer can photograph. The decisive dependency is often the engine, electronics, software, ejection seat, raw material or certification held by a lower tier supplier. That is how the prime contractor appears to be the only supplier that matters. That is the control point hiding behind the headline fact: India built the Tejas.

Control is usually exercised through procedure, not a cinematic red switch. The party holding the leverage can withdraw a component or its approval while leaving the main contract looking perfectly healthy. By the time the buyer is certain that the delay is political, the readiness loss has already begun. For India, the warning is captured by what followed: America delivered the engine late.

Local content still has value. Jobs, skills and assembly experience matter. But none of them should be confused with the ability to redesign, certify and sustain the system without foreign consent. That distinction matters here: America delivered the engine late.

For India, national paint does not create a national supply chain.

Before selection, put the uncomfortable questions into the procurement file. Can your own engineers certify a substitute without the original supplier? What inventory exists for components with geopolitical exposure? Has the proposed alternative ever flown, fired or operated in the complete system? The first half of this headline, 'India built the Tejas', is where that test begins.

This is where scenario planning has to become specific. Do not write 'seek alternate supplier' in the risk register and move on. Name the supplier. Confirm the legal route. Price the integration. Hold the stock. Train the people. Until those steps are complete, the alternative is a comforting noun rather than an operational capability. The exercise has a concrete starting point in this case: India built the Tejas.

The buyer still has options: fund qualification of a second source before the first source becomes unavailable, secure technical data and interface information for critical parts and hold strategic spares in-country under the buyer's control. These measures are rarely as exciting as the platform. They are often what make the platform usable.

The finance ministry should see this risk too. Resilience can look expensive because its cost appears in the tender. Dependence often looks free because its cost appears later, in emergency purchases, redesign work, lost readiness and political concessions. That accounting difference does not make dependence cheaper. It merely hides the invoice. The headline fact, 'India built the Tejas', should carry that exposure in its score.

Then test the fallback. Which tier two and tier three suppliers have no qualified alternative? Where are export licences required after the initial sale? Which drawings and test data would be needed to replace a blocked part? A plan that exists only in a slide deck will not become real because the crisis has arrived. The first half of this headline, 'India built the Tejas', is where that test begins.

The final test for India is simple: can national engineers replace and certify the critical foreign part without waiting for a fresh political approval? If the honest answer begins with 'provided that somebody else agrees', that condition belongs on the first page of the procurement decision, not in an annex nobody reads.

The platform may remain physically in your hangar while the ability to operate it disappears one component at a time. A national platform with a foreign heartbeat is only national while the heartbeat keeps arriving. That risk is easy to miss when the announcement stops at 'India built the Tejas'.