Boostback and reentry burns are always 3 engines. Landing burns are often 2 engine and often 1-3-1, usually on the drone ship. The unique part of the GovSat "f

Boostback and reentry burns are always 3 engines. Landing burns are often 2 engine and often 1-3-1, usually on the drone ship. The unique part of the GovSat "failed to expend" mission a few weeks ago was not cutting off the outer two engines some time before hitting the surface, not that it used three engines at all.