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**Summary:**

ISRO has completed its analysis of the failed PSLV-C61/EOS-09 mission that occurred in May 2025. ISRO Chairman V. Narayanan announced that the failure analysis committee has identified the cause of the malfunction, described as a “small” problem, that prevented the satellite from reaching its intended orbit. The report will be submitted to Prime Minister Modi. While details are withheld pending the report’s review, Narayanan expressed full confidence in upcoming PSLV missions, with the next launch planned within three months. Initial reports indicated a pressure drop in the third stage motor case as the reason for the failure.

**News Article:**

**ISRO Pinpoints Cause of Failed PSLV-C61 Mission, Next Launch Imminent**

**THIRUVANANTHAPURAM, August 1, 2025** – The Indian Space Research Organisation (ISRO) has identified the root cause of the Polar Satellite Launch Vehicle-C61/Earth Observation Satellite-09 (PSLV-C61/EOS-09) mission failure that occurred on May 18, 2025. ISRO Chairman V. Narayanan announced the completion of the failure analysis at an event at the CSIR-National Institute of Interdisciplinary Science and Technology (NIIST) in Thiruvananthapuram.

“The analysis is over, and the committee’s report will shortly be handed over to Prime Minister Narendra Modi,” stated Mr. Narayanan. While declining to reveal specific details until the Prime Minister reviews the report, he characterized the problem as “small.”

The PSLV-C61/EOS-09 mission experienced a perfect lift-off from the Satish Dhawan Space Centre in Sriharikota. The mission’s objective was to place the EOS-09 satellite into a sun-synchronous polar orbit. However, the mission encountered difficulties in the third stage, leading to its failure.

Following the incident, ISRO had indicated an anomaly in the third stage of the rocket. “PSLV-C61 performance was normal till the second stage. Due to an observation in the third stage, the mission could not be accomplished,” the agency stated initially. Mr. Narayanan had previously cited a drop in chamber pressure in the motor case of the third stage as a potential cause.

Despite the setback, Mr. Narayanan expressed strong confidence in the future of the PSLV program. “I am 100% confident about upcoming PSLV missions,” he asserted, noting that several launches are planned for the remainder of 2025.

ISRO is aiming for the next PSLV mission to launch within three months. “We are in the process of preparing for the next PSLV launch,” he confirmed.

The PSLV-C61 flight marked the 63rd flight of the launch vehicle and the 27th utilizing its ‘XL’ configuration. The failure represents a rare blemish on the PSLV’s otherwise stellar record of reliability.

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