The disintegration Dispersal of the vehicle began Process_start after a joint Collaboration in its right solid rocket booster ( SRB ) failed at liftoff Motion_directional .

The seals ' failure caused Causation a breach in the SRB joint , allowing Preventing_or_letting pressurized burning gas from within the solid rocket motor to reach Arriving the outside and impinge upon the adjacent SRB aft field joint Collaboration attachment hardware and external fuel tank .

The seals ' failure caused Causation a breach in the SRB joint , allowing Preventing_or_letting pressurized burning gas from within the solid rocket motor to reach Arriving the outside and impinge upon the adjacent SRB aft field joint Collaboration attachment hardware and external fuel tank .

This led to Causation the separation Forming_relationships of the right-hand SRB 's aft field joint Collaboration attachment and the structural failure of the external tank .