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Bell Completes First SPINE Modernisation Upgrades on AH-1Z and UH-1Y Helicopters for U.S. Marine Corps Testing

The SPINE programme, previously known as the Structural Improvement and Electrical Power Upgrade (SIEPU), focuses on improving aircraft structure and power delivery systems. The effort is designed to support enhanced weapons systems and other future capabilities while improving survivability and lethality across the Marine Corps’ H-1 fleet. Flight tests at Naval Air Station Patuxent River will determine the final configuration for the SPINE upgr…
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Frag Out! Magazine broke the news in on Tuesday, March 17, 2026.
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