in each sponson into one larger fuel cell and eliminating intracell fuel transfer hardware, reducing weight by and increasing fuel capacity. Electrical capacity is increased by three 60 kVA generators. Part of the Block II upgrade was the Advanced Chinook Rotor Blades (ACRB), intended to improve lift performance in hot/high altitude conditions by 2,000 lb, after initially being trialed in 2020 ACRB testing was postponed by the US Army due to vibration issues. Boeing denied the Army's assertion that the vibration issues were a safety risk and believed it could be solved with dampeners. Testing resumed in 2021 but the Army ultimately decided against implementing the upgrade as the vibration issues persisted in the resumed testing, in addition the aft rotor blade was stalling when in a swept back position. The U.S. Army plans for a Block 3 upgrade after 2025, which could include a new class engine with boosted power capacity of the transmission and drive train developed under the future affordable turbine engine (FATE) program and a lengthened fuselage. The Future Vertical Lift program plans to begin replacing the Army's rotorcraft fleet in the mid-2030s, initially focusing on medium-lift helicopters, thus the CH-47 is planned to be in service beyond 2060, over 100 years after first entering service. The German government announced in June 2022 that Boeing's CH-47F Chinook Block II standard range was selected as the winner of its heavy helicopter program to replace its Sikorsky CH-53G Sea Stallion fleet. MH-47G The MH-47G Special Operations Aviation (SOA) version is currently being delivered to the U.S. Army. It is similar to the MH-47E, but features more sophisticated avionics including a digital Common Avionics Architecture System (CAAS). The CAAS is a common glass cockpit used by different helicopters such as MH-60K/Ls, CH-53E/Ks, and ARH-70As. The MH-47G also incorporates all of the new sections of the CH-47F. The new modernization program improves MH-47D and MH-47E Special Operations Chinooks to the MH-47G design specs. A total of 25 MH-47E and 11 MH-47D aircraft were upgraded by the end of 2003. In 2002, the army announced plans to expand the Special Operations Aviation Regiment via an additional 12 MH-47G helicopters. The final MH-47G Chinook was delivered to the U.S. Army Special Operations Command on 10 February 2011. Modernization of MH-47D/E Chinooks to MH-47G standard is due for completion in 2015. On 1 September 2020, Boeing announced that their Philadelphia plant had delivered