Preventive Maintenance System components and equipment will be inspected to ensure continued performance and reduce the risk of system failure. Repairs Any repair components and methods shall be of the original manufacturer or substitute that preserves the UL listing of the Fire Equipment or systems. Substitutes must be approved by the Maintenance Manager or Designee. Corrective Maintenance Required repairs for deficient or inoperable devices such as those found during the course of system testing, inspection or preventative maintenance, or have failed during operation will be provided. Only original replacement components manufactured by the original equipment manufacturer or other compatible components are used to preserve Underwriters Laboratories (U.L.) Listings and meet NFPA requirements.