33 C.F.R. § 150.504 When must the operator service and examine lifeboat and rescue boat launching appliances?
Title 33 - Navigation and Navigable Waters
(a) The operator must service launching appliances for lifeboats and rescue boats at intervals recommended in the manufacturer's instructions under §150.502(a), or deepwater port's planned maintenance program under §150.502(b). (b) The operator must thoroughly examine launching appliances for lifeboats and rescue boats at intervals not to exceed 5 years. Upon completion of the examination, the operator must subject the winch brakes of the launching appliance to a dynamic test.
Title 33: Navigation and Navigable Waters
PART 150—DEEPWATER PORTS: OPERATIONS
Subpart F—Emergency and Specialty Equipment
Launching Appliances
§ 150.504 When must the operator service and examine lifeboat and rescue boat launching appliances?

