That did do pretty well. But you can see at altitude around T +01.40 where the one engine flamed out, and apparently the unlit gas filled the lower chamber enough to catch things on fire when gas buildup reached the lit remaining two engines several seconds later. They were kind of lucky if there wasn’t any control wiring for the engine directional actuators that didn’t burn through that high up, otherwise that could have landed nearly anywhere if the engines locked in hard turn position.
Added armor to the control cables and hydraulic runs, since that test stand incident which threw ceramic thermal protection over the concrete type shrapnel into the engine cowl area.