Boeing's Philadelphia, Pennsylvania V-22 factory, which produces the fuselage and other major equipment for the joint Bell-Boeing tiltrotor aircraft, may close as soon as 2025, according to a Boeing official. Discussions have begun about closing the assembly line, said Shane Openshaw, Boeing's programme manager for the V-22, on 23 May. “We're starting to have those conversations subject to additional orders coming in the pipeline,” he said. “I would project probably two more years [of assembly].” The assembly line also converts Block B V-22s to Block C, upgrading processors, wiring harnesses, and electrical components and reducing subvariants from about 72 to 5, according to Openshaw. The US Navy (USN) in February released a solicitation for “non-recurring engineering to support the V-22 production line shut down,” disclosing that the Bell-Boeing joint venture that produced the tiltrotor would be awarded the contract. The solicitation did not include a public timeframe for the closure. There are 36 tiltrotors yet to build, Openshaw said, and 25 to be upgraded to Block C. Outstanding orders include CMV-22s, which are replacing the USN's Northrop Grumman C-2s in the carrier onboard delivery role.