Why PSLV-C39 failed: An explosion that didn’t happen

Director of Vikram Sarabhai Space Centre and Isro chairman-designate K Sivan, who chaired the failure analysis committee, said a rubber bellow between the two vertical halves of the heat shield was supposed to expand with the gas pressure generated by the ignition of the pyro devices

from Times of India http://ift.tt/2FwWh6Z