Critical Path

Solution

 It is not the longest solution, but it works:

 Tunnel Doors      - no action -
 MCL Established   Alert 123
 Ore Carts         152
 Conveyor Belt     E
 Furnace           J
 Crane             G
 Catwalks          Left-Forward-Left-Left-Forward-Right-Right-
                   Left-Right
 Hallway           Right
 Packing Room      Right
 Water Tower       666
 Torture Chamber   -
 Electric Chair    451
 Elevator Shaft    911          The End (of Minh) N