Oil Pressure Relief Valve
Bad scenario - my recently acquired partner in my Rans S7 decided to do an oil change on our rotax 912uls. Instead of removing the Mag plug, he removed the oil pressure regulator bolt. He reassembled the bolt and spring, BUT didn't replace the ball bearing. He then ran the plane for a good 5 minutes with 0 oil pressure reading on the guage. Now, my understanding is the pressure regulator allows oil to return to the oil pump thus "bypassing" oil pressure to the main engine components. What I don't know is how much is bypassed. My particular concern is damage to the engine. Does anyone know if all of the oil is bypassing engine components with the ball bearing missing? And if so, what type of damage/repair are we potentially dealing with?
I attached a picture for reference.