|Launch site||Sriharikota Range, Sriharikota, Andhra Pradesh, India|
|Description||Third stage partial failure|
|Payload||GSAT (experimental satellite, Indian Space Research Organisation)|
|Desired orbit||Geostationary transfer orbit|
The Hindu newspaper named two suspects that may have caused the problem: the third stage's Russian cryogenic engine, which has never flown before; and the rocket's navigation system, which had been used on India's PSLV before, but only for missions to polar orbit.
ISRO officials were confident that the data gathered on the first flight will help them fine-tune the cryogenic engine, which achieved a speed of 10.13 km per second instead of the needed 10.2 km per second.