The longer they keep them grounded, the more extensive the actions needed to get them airborne. Hydraulic seals etc... decay without being exercised.Fyi --
CMV-22B Osprey "Not Operationally Suitable" According To Test Report
Pentagon testers highlight major issues with the Navy's Osprey as the entire V-22 fleet remains grounded following a deadly crash.www.twz.com
This is a pretty serious problem.
Thanks
Joel