You have to have a tech let you in the pit. You sign a indemnity agreement before you are let in. If yours elevator runs with a limited amount of callbacks and you see your tech regulary then maintenance is getting done.
You can also hire a consultant to perform a maintenane evaluation.
Tac-20s does not have inspection switches in the controller. Its extremely dangrous if you try to enter the pit or hatch.
Keep up good communication with your tech. If you have any concerns he will be more then happy to address them for you.
