Nov. 16, during the process stops (shortage of HBM) maintenance section have cleaned (PM) of PLT 402Zs and after the finish, then open the steam distribution and start working (free load), and then wait for the process to start, and after 2 hours (16.30-18.30) has examined again found the scratch of the external shell, because the PIN lock manual dropped out of alignment causing a touch of outer shell with a guide then stops and reinstall the PIN in the correct position.
Reasons caused by maintenance staff, do not install the PIN back in the correct position.