ISRO Successfully Tests Modified PSLV Third Stage After Two Mission Failures

ISRO said it successfully completed a ground static test of the <b>modified third stage</b> of its Polar Satellite Launch Vehicle at the Satish Dhawan Space Centre in Sriharikota. The test follows two consecutive PSLV mission failures in which the agency observed anomalies in the third stage. ISRO said it reviewed design margins, material acceptance, assembly procedures and quality checks before modifying the stage. Changes include improvements to the solid motor’s nozzle and mechanical interfaces, added redundancy in sealing systems, and revised procedures for material acceptance and non-destructive testing during integration and transportation.