Large-aircraft final assembly line

Only a handful of nations — ten, by one count — can build a large aircraft to completion, and India entered that group only recently. The line between assembling a jet and manufacturing one runs through engines, avionics, and certification, and India has crossed only part of it.

What it takes

A final assembly line (FAL) is where major structures — fuselage, wings, tail — are mated, systems integrated, and the finished aircraft tested and flown. It is the visible end of a long chain: structural design, composite fabrication, tooling, a tiered supplier base, and an independent authority to certify the result airworthy. Assembling someone else's design is hard. Owning the whole chain is harder, and most of the ten possessor nations took decades to get there.

Where India stands

India's C-295 programme is the clearest demonstration. Tata Advanced Systems Limited (TASL) inaugurated a FAL at Vadodara in October 2024, the first major military aircraft programme in which a private Indian company handles large-scale assembly and industrial integration. Of 56 aircraft ordered for ₹21,935 crore, 16 arrive fly-away from Spain; 40 are built in India, with delivery to the Indian Air Force expected from September 2026 and production ramping toward eight aircraft per year through 2031.

The industrial depth is real. More than 13,000 parts are being made across India through 37 suppliers, and local content is planned to rise from 48% on the first aircraft to 75% on the final 24, with technology transfer of up to 90%. TASL also opened India's first private-sector helicopter FAL at Vemagal, Karnataka in February 2026 for the Airbus H125, first delivery expected early 2027. On the commercial side, Adani Defence & Aerospace signed MoUs with Embraer in January and February 2026 for an E175 regional-jet FAL — location, investment, and timeline still under evaluation.

Why the gap persists

The C-295 is assembled, not designed, in India. Engines, avionics, and landing gear remain foreign-sourced; India has no indigenous large turbofan, and certification still leans on European authority. The structure is Indian; the aircraft's identity is not. This is why India remains the world's second-largest arms importer — 8.2% of global purchases over 2021–2025 — with heavy dependence on aero-engines and combat systems.

Closing the gap means maturing the layers beneath the FAL: indigenous engines, avionics integration, composite fabrication, and an independent certification capability. Demand is being engineered — 75% of the FY 2026-27 capital acquisition budget is earmarked for domestic sourcing. The lines exist. The chain feeding them is still being built.