All documents in place. SOP clearly stated that tilting the bails at monkey board level should be avoided. The equipment inspected. No hard control to limit the tilt function of a stand above monkey board. Good housekeeping performed prior starting the operation, safe zone area identified. Swing of the stand introduced uncontrolled energy. The decision to tilt the bails at the monkey board level was made without proper discussion or MOC No final verification was done to ensure critical steps in the SOP were being followed. The unsafe act of tilting the bail links was not identified or stopped during execution