What Happened
- Hindustan Aeronautics Limited (HAL) disclosed that nine LCA Tejas Mk1A aircraft are fully assembled but cannot be delivered because they are awaiting GE F404-IN20 engines from GE Aerospace (USA)
- Five Tejas Mk1A aircraft incorporating all major contracted capabilities and meeting agreed technical specifications are ready for delivery to the Indian Air Force (IAF)
- HAL's original commitment was to deliver 10 Mk1A fighters and 12 trainers in FY 2025-26; revised targets are 5 fighters and 3 trainers — a significant shortfall
- GE Aerospace has committed to delivering 24 F404-IN20 engines to HAL in FY 2026-27, scaling to 30 annually from FY 2027-28 onwards
- A broader contract for 113 F404 engines (valued at approximately ₹8,870 crore or ~$1 billion) was signed in November 2025; deliveries begin in 2027 and conclude by 2032
Static Topic Bridges
LCA Tejas Programme — India's Indigenous Fighter Jet Journey
The Light Combat Aircraft (LCA) Tejas is India's most significant domestic aerospace achievement — a single-engine, delta-wing multirole fighter developed by the Aeronautical Development Agency (ADA) with HAL as the production agency. The programme began in the early 1980s and faced decades of delay primarily due to technology denial regimes (post-1998 nuclear tests), engine supply constraints, and institutional challenges. The Tejas Mk1A is the current production variant featuring significant upgrades over the Mk1: AESA (Active Electronically Scanned Array) radar, self-protection jammer, air-to-air refuelling capability, and beyond-visual-range missile compatibility.
- LCA Tejas development timeline: Conceptualised ~1983; initial operational clearance 2001; final operational clearance (FOC) 2019 — approximately 36-year programme
- Orders placed: 40 Mk1 (delivered), 83 Mk1A (2021 contract, ₹48,000 crore), plus additional 97 Mk1A under discussion
- Mk1A key upgrades: AESA radar (Uttam), Electronic Warfare self-protection jammer, active refuelling probe, compatibility with Derby BVR and Astra Mk1 missiles
- Engine: GE F404-IN20 (American) — generates approximately 85 kN thrust with afterburner
- Role: Air superiority, ground attack, maritime strike — replacing retiring MiG-21 Bison squadrons
Connection to this news: The engine supply bottleneck directly delays the Mk1A programme, creating an operational readiness gap as the IAF phases out its ageing MiG-21 fleet. Nine aircraft sitting complete but engineless illustrates the structural risk of dependence on a foreign single-source supplier for a critical sub-system.
India-US Defence Technology Cooperation and Engine Supply Dependencies
The GE F404 and F414 engines power two of India's most critical indigenous fighter programmes — the Tejas Mk1A (F404) and the planned AMCA Mk1 (F414). The supply of these engines is governed by bilateral defence trade arrangements under the Major Defence Partner (MDP) framework established in 2016 and subsequently elevated through the India-US defence agreements. Despite this strategic partnership, export licensing constraints and production prioritisation decisions in the US can affect delivery timelines for Indian programmes.
- India-US Major Defence Partner status: Established 2016; allows technology transfer comparable to closest US allies
- Key India-US defence agreements: LEMOA (2016), COMCASA (2018), BECA (2020) — collectively called the Foundational Agreements
- GE F404-IN20 contract (November 2025): 113 engines, ₹8,870 crore (~$1 billion), delivery 2027–2032
- GE F414 selected for AMCA Mk1: Subject to US government export approval for technology transfer
- India's leverage: Its own iCET (Initiative on Critical and Emerging Technologies) framework with the US includes joint development of jet engine technologies — a potential pathway to reducing future dependence
- GE Aerospace delivered its 4th F404-IN20 engine to HAL in September 2025; 5th delivered subsequently; 12 total expected by end of FY 2025-26
Connection to this news: The delivery gap for nine aircraft underscores the strategic risk of designing military platforms around foreign engines without a domestically produced alternative. This is the central argument driving investment in India's Kaveri engine programme and its successor designs.
India's Kaveri Engine Programme and the Quest for Propulsion Autonomy
India's own jet engine development effort — the Kaveri — was initiated by DRDO's Gas Turbine Research Establishment (GTRE) in 1989 to provide an indigenous powerplant for the LCA Tejas. Despite decades of work and over ₹2,000 crore in investment, Kaveri was never certified for use in Tejas due to insufficient thrust and reliability concerns. However, Kaveri-derived technology has found application in cruise missiles and unmanned platforms. A new indigenous engine programme under DRDO/GTRE is now planned to power the AMCA Mk2 variant.
- Kaveri engine programme started: 1989; target thrust: 81 kN (with afterburner)
- Why it failed for Tejas: Achieved approximately 73 kN thrust — below the 90 kN required for Tejas performance targets; also failed high-altitude testing
- Kaveri derivatives: Used in Nirbhay subsonic cruise missile development
- AMCA Mk2 engine plan: A new indigenous engine with approximately 110 kN thrust is being designed, with Safran (France) as a potential technology partner
- iCET framework: India and US agreed to co-develop a next-generation jet engine, providing a potential path to partial propulsion self-sufficiency
Connection to this news: The nine-aircraft delivery delay caused by missing GE engines makes the strongest possible case for accelerating India's indigenous propulsion programme. Until India can produce its own combat aircraft engines at scale, its fighter jet programmes will remain hostage to foreign supply chain decisions.
Technology Denial Regimes and India's Defence Procurement History
India's defence modernisation has historically been hampered by technology denial regimes — principally the Missile Technology Control Regime (MTCR), the Wassenaar Arrangement, and bilateral US restrictions under the Export Administration Regulations (EAR). After India's 1998 nuclear tests, the US imposed sanctions that severely disrupted the LCA programme by cutting off access to the General Electric F404 engine, forcing HAL to use an interim Russian engine. The normalisation of India-US defence ties from 2005 onwards — accelerated by the landmark US-India Civil Nuclear Agreement — gradually lifted these restrictions.
- Post-1998 US sanctions impact on LCA: GE F404 supply cut off; programme delayed by years
- MTCR: Regulates transfer of rocket/missile technologies; India joined MTCR in 2016
- Wassenaar Arrangement: Controls exports of dual-use goods/technologies; India joined in 2017
- NSG (Nuclear Suppliers Group): India still not a member despite lobbying; limits access to some civil nuclear technologies
- 2005 Next Steps in Strategic Partnership (NSSP): Began the process of removing technology denial restrictions on India
Connection to this news: The current engine supply situation — while not involving sanctions — echoes the structural vulnerability first exposed in 1998. The lesson: single-source foreign engine dependency for critical military platforms creates strategic fragility that can be exploited during geopolitical tensions.
Key Facts & Data
- LCA Tejas Mk1A aircraft awaiting GE engines: 9
- LCA Tejas Mk1A aircraft ready for IAF delivery: 5
- Original FY 2025-26 delivery target: 10 fighters + 12 trainers; revised to 5 fighters + 3 trainers
- GE F404-IN20 engine commitment: 24 engines in FY 2026-27; 30/year from FY 2027-28
- Total F404 engine contract (Nov 2025): 113 engines, ₹8,870 crore (~$1 billion), delivery 2027–2032
- LCA Mk1A contract size: 83 aircraft, ₹48,000 crore (2021)
- Engine thrust: GE F404-IN20 — approximately 85 kN (afterburner)
- Kaveri engine status: Not certified for Tejas; derivatives used in cruise missiles
- AMCA Mk1 engine: GE F414; AMCA Mk2 engine: Indigenous (target ~110 kN)
- India-US defence framework: Major Defence Partner (2016); Foundational Agreements: LEMOA, COMCASA, BECA