http://economictimes.indiatimes.com/news/politics/nation/isro-to-conduct-gslv-test-flight-in-2012-with-russian-cryogenic-stage-engine/articleshow/8044557.cms
So what about the seventh cryogenic engine from Russia? There were reports that both Isro and Russia disagreed on technical reasons for the failure of the most recent GSLV mission in December.The last two engines (the sixth and seventh) have greater thrust than previous engines. They was supplied in 2004 and 2005, and stored in specified conditions. So the reason for the failure (in December) was the inadvertent snapping of the connectors, well before time [connectors are critical for controlling the vehicle]. This happened because the shroud gave away (the shroud is a casing that separates the liquid and solid stages of the launch cover). It’s a cover that sits on (the) bottom of the cryogenic stage. Now, why did the shroud go? Was it the 4m heat shield? We then realized that it was the inherent vulnerability of the shroud. The shroud was at the bottom of the cryogenic stage. There were 10 connectors in two stages, and both gave way. Initially, the Russians said it was our 4m shield that was responsible. We put both our analyses, and finally the Russians also came around. We then decided that the seventh engine has to be inspected, too. We did it and found that they weren’t made in the dimensions specified to in the document. There are lots of shortcomings, and the Russians admitted it. Now, the point is that this has to be corrected before it can be used for launch and would require a detailed inspection by them.
Resurrecting an old thread http://www.indiastrategic.in/topstories986.htm"The fault was there from the first GSLV that flew with the Russian cryogenic engine in 2001. The weakness in the shroud caught ISRO on December 25 last year," "All GSLV's that flew with Russian cryogenic engine have encountered problems carrying a payload of over 2,000 kg""In 2007, one of the connecters of the GSLV rocket got snapped and the rocket's performance was considered as below par. The rocket had carried 2,130 kg INSAT-4CR satellite"
