Ok WorkingSuper,
I've been trying to follow your thread while I was away. I'm sure you would agree how great it is so many are participating!

Please provide us with the manufacturer and model of the equipment?

You may need to ask your elevator contractor to help in answering our questions...

Single piston roped hydro? Duel piston roped hydro?

Slack in which cable(s)? Piston? Governor?

Is there an electrical switch on the overspeed governor?

Is there a chance the governor mechanical rope grips are tripping in the up direction? Is there a chance when the car starts to go down the dawgs on the safety plank grab the rails and stop the car?

If you were to open the doors, how close to the top landing floor is the elevator car floor?

Any chance you were riding the elevator when anything has happened? If so, when the car started to move up did it feel abrupt and bounce?

I know I've asked already! But this is really important.

Who is the manufacturer? (Otis, Schindler, Dover, Westinghouse)

What is the manufacturers model? (SOB, 330A, DMC, HYL2BC)

Manufacture and model # of the governor?

And one last thing any pictures? Governor, safety plank, pump unit, controller, piston assembly?