The 42 aircrafts would be be built at the HAL's Nashik plant and delivered to the Indian Air Force in the next 4-5 years, the firm's former Managing Director (Nashik and Koraput Divisions) Prakash V Deshmukh told PTI.

Responding to a question on the Indo-Russian deal signed yesterday, he said the process will signify India's capability to indigenously build modern world-class fighter planes from raw materials.

"Last year, HAL Nashik delivered four such aircrafts, built from raw material to the Indian Air Force," Deshmukh said.

Of the 28,000 aircraft parts manufactured indigenously, nearly 11,000 were outsourced from the private sector including flight-critical assemblies, he said.