Rolls-Royce Holdings plc announced it has successfully completed altitude and operability testing of its F130 engine, a key development milestone for the U.S. Air Force B-52J re-engining program. The company said tests at the Air Force’s Arnold Engineering Development Complex validated sustained high-altitude performance, engine stability under distorted airflow, and reliable electrical power generation with Boeing, with results already gathered during the completed test campaign. Rolls-Royce said the program will move next into further system integration and additional dual-pod testing at NASA’s Stennis Space Center, which will occur in the future.

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