Sop Monkey
"The aircraft i've operated, and there has been quite a number ..."
Evidently not an Airbus, seeing your questions about A320 spoilers, which no-one bothered to answer (because G;ggle would have clarified all in 5 min).
How was it ever certified? Because the FAA certified it, that's why. You think jet transports should still be designed with wires pulling the control surfaces?