The Juan Carlos I LHD flung together starting 2005? should be good to go then as required. Anyways....
Rolls-Royce Bags Contract To Produce & Support LiftSystem For F-35 Lightning II 25 Nov 2013
"...Moreover, the F-35B fleet nears multiple major milestones. In more than 450 flights of Mode 4 operation, F-35B aircraft have completed over 1,000 short take-offs, 640 vertical landings, comprising over 150 aboard the USS Wasp, 550 slow landings and 250 hover test points...."
Rolls-Royce Bags Contract To Produce & Support LiftSystem For F-35 Lightning II