US AFSOC grounds entire 52 x CV-22B fleet indefinitely due to engine hard clutch engagement problems.
Very informative video here from a retired Cdr USN aviator who worked in the V-22 program.
AFSOC describes the problem as a “hard clutch engagement":
”Basically, the clutch inside a gearbox that connects one of the CV-22’s two Rolls-Royce Liberty AE1107C engines to the propeller rotor is slipping for an unknown reason, When that happens, the power load transfers nearly instantaneously to the other engine — a design feature that would allow the Osprey to keep flying even if one engine fails. Then, in most cases, the initial clutch re-engages, and the power load rapidly shifts back to the original propeller rotor and engine.
As a result of the rapid movement of power across engines, however, the aircrew is forced to land the CV-22 immediately, and if the aircrew were unable to control the aircraft when the incident occurs, it could result in loss of control and uncontrolled landing of the aircraft.”
https://breakingdefense.com/2022/08/...-safety-issue/