Underground Air Door Mechanical Inspection 4 Week

This safe work instruction outlines a planned offline mechanical inspection for underground air doors used in mining operations. It details qualifications, required equipment, critical safety controls, pre start preparations, isolation and lockout procedures, door inspection and maintenance tasks including visual checks, fasteners, cables, lubrication and chain tension review, and final task completion and documentation. The scope applies to underground power machine doors at Kennecott Underground with an estimated duration of two hours and ownership under the asset management team.