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Blue Origin zeroes in on rocket engine issue as source of New Glenn explosion

By Thomson Reuters Aug 5, 2026 | 2:19 PM

WASHINGTON, Aug 5 (Reuters) – A massive explosion of Blue Origin’s centerpiece New Glenn rocket in May ​was triggered by an ‌issue with one of the rocket’s BE-4 engines, the company’s CEO said on Wednesday as it races to return the ‌vehicle ​to flight later this ⁠year.

“The anomaly originated ⁠at the main oxygen valve on one of the BE-4 engines, which was later confirmed by hardware ​recovery and inspections,” Blue Origin CEO Dave Limp wrote on ⁠X. “The path forward ⁠is clear. We’re making small ​modifications to the valve that can ​be quickly retrofitted to existing engines.”

The ‌BE-4 engines are also used on the Vulcan rocket owned by United Launch Alliance, the Boeing-Lockheed Martin ⁠joint rocket venture, which has said it is collaborating with Blue Origin on ⁠its investigation.

New ‌Glenn exploded on its ⁠Florida launchpad in May ​days ‌before its fourth flight, sending ​shockwaves across ⁠the Cape Canaveral coast and damaging some launchpad infrastructure known to take years to build.

(Reporting by Joey Roulette; Editing by Mark Porter and ​Nick Zieminski)