Bell completes first SPINE structural and power upgrades on AH-1Z Viper and UH-1Y Venom; aircraft enter flight testing
Bell has finished the first Structural and Power Improvements for NextGen Effects (SPINE) upgrades on the US Marine Corps' AH‑1Z Viper and UH‑1Y Venom, completing structural and power‑delivery modifications. The two H‑1 aircraft have moved into flight testing as the program advances toward USMC evaluation.