Why did blue origin rocket explode?

On 12 September 2022 a New Shepard vehicle carrying research payloads and no passengers suffered a failure roughly a minute into flight. Video showed an abnormal plume from the booster followed by the immediate activation of the launch escape system: the solid motor in the crew capsule fired, pushed it clear of the rising booster and the capsule descended under parachutes to an intact landing in West Texas. The propulsion module was lost.

The investigation, conducted by Blue Origin under Federal Aviation Administration oversight, attributed the failure to a structural fatigue failure of the nozzle on the BE-3PM engine, driven by operating temperatures higher than the design had anticipated. Corrective actions included design changes to the nozzle and to engine control parameters. New Shepard returned to flight with an uncrewed mission in December 2023 and resumed carrying passengers the following year.

Escape systems are the part of a crewed launcher that everyone hopes never to see used. NS-23 was an unplanned full-scale demonstration in real flight conditions, at high dynamic pressure, and it worked as designed. Had passengers been aboard, the sequence they would have experienced was the one the system exists for: a hard push, a short free fall and a parachute descent.

Blue Origin had already tested the same escape system deliberately in 2016 and 2018. Other vehicles have had comparable in-flight losses without casualties, precisely because they flew uncrewed or aborted successfully. In the launch business, an uncrewed failure that validates the safety chain is expensive but not a disaster.