Indian Air Force Indigenises Critical Hydraulic Booster Pump for Su-30MKI Fighter Fleet

The Indian Air Force has added a critical hydraulic booster pump used on the Su-30MKI fighter aircraft to its growing list of indigenised aviation spares, strengthening domestic support for one of the most important combat aircraft in the IAF inventory.

The achievement forms part of a much larger programme being driven by the IAF’s Maintenance Command to reduce dependence on overseas original equipment manufacturers for aircraft maintenance and overhaul. Recent disclosures on the programme show that around 62,300 aircraft spares have now been indigenised, covering equipment ranging from fighter aircraft tyres and batteries to parachutes, ejection-seat components and ground-support equipment. The hydraulic booster pump for the Su-30MKI was specifically identified among the components successfully localised.

According to the figures disclosed as part of the initiative, indigenous sources now account for about 97 per cent of frequently required spares for operational units and 93 per cent of mandatory spares needed for overhaul of decentralised fleets. The localisation programme has also generated estimated foreign-exchange savings of ₹582 crore over five years.

Hydraulic systems are particularly important on high-performance combat aircraft because they provide the power needed to operate several mechanically demanding aircraft functions. Localising specialised hydraulic components therefore has implications beyond simply replacing an imported spare: it can shorten procurement cycles, improve availability during maintenance and reduce exposure to disruptions in foreign supply chains.

The Su-30MKI is especially important to this effort because India operates a large fleet of the twin-engine multirole fighters. Although the aircraft was developed from the Russian Su-30 family, HAL has progressively absorbed manufacturing capabilities in India and the government has continued pushing for deeper localisation of its components and support infrastructure.

That process is accelerating. On August 18, 2026, the Ministry of Defence issued the Sixth Positive Indigenisation List, covering another 405 strategically important items with an estimated business potential of ₹3,070 crore. The list includes components associated with platforms such as the Su-30MKI and its AL-31FP engine, reinforcing the wider effort to move critical defence supply chains into India.

The government is simultaneously increasing the indigenous content of newly manufactured Su-30MKIs. The Ministry of Defence’s December 2024 contract with Hindustan Aeronautics Limited for 12 additional Su-30MKI aircraft, valued at approximately ₹13,500 crore, specified an indigenous content of 62.6 per cent, reflecting the localisation of an increasing number of components produced by Indian defence industry.

India has also invested in developing complex aviation hydraulic technologies domestically. Under the Defence Research and Development Organisation’s Technology Development Fund, an Engine Driven Hydraulic Pump for aircraft applications has been taken up for indigenous development, illustrating the broader effort to build domestic capability in sophisticated aircraft hydraulic equipment. Official TDF records identify Zeus Numerix Pvt Ltd as the development agency for that project.

The IAF’s localisation programme is increasingly being supported by private companies, MSMEs, research institutions, additive manufacturing and new maintenance technologies. The Maintenance Command is reported to be working with around 930 Indian firms, substantially expanding the domestic industrial network supporting the Air Force’s diverse fleet.

Indigenisation of the Su-30MKI hydraulic booster pump is therefore best viewed as part of a wider transformation of India’s military aviation support system. By bringing difficult-to-source components into domestic production, the IAF is gradually building the ability to maintain and sustain its frontline aircraft with fewer external dependencies — an increasingly important element of long-term combat readiness and strategic autonomy.