482FW91-203 — Lockout/tag Out, Signs And Tags

482FW91-203 governs lockout/tagout procedures, signs, and tags for hazardous energy control.

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  • Publication number: 482FW91-203
  • Title: LOCKOUT/TAG OUT, SIGNS AND TAGS
  • Date: 2020-09-16

View 482FW91-203 on armypubs.army.mil


482FW91-203 establishes requirements for energy-control procedures, training, and periodic inspections to prevent unexpected start-up. It details the Nine Step LOTO Process and requirements for isolating hazardous energy during servicing, maintenance, or modification.

Applies to: It applies to all machines, equipment, Air Force workers and contractors who may be exposed to hazardous energy during servicing, maintenance or modification activity.

Topics covered

  • Lockout/tagout procedures
  • Hazardous energy sources
  • Energy-isolating devices
  • LOTO training
  • Periodic inspections
  • Signs and tags

Questions and answers

Who is allowed to perform LOTO procedures?

Only authorized workers shall perform LOTO procedures. (paragraph 3)

When is LOTO required for equipment or machinery?

LOTO is required whenever service, maintenance or modification will be performed on equipment or machinery where unexpected energizing, start-up or release of stored energy could injure personnel or damage equipment. (paragraph 2)

When must notification about LOTO devices be given?

Notification shall be given before controls are applied and after they are removed. (paragraph 3)

What do LOTO tags provide?

Tags are warning devices attached to energy isolating devices and cannot provide the physical restraint or security of a lock. (paragraph 5)

How long must energy sources remain locked out?

Energy sources shall remain locked out until all actions are complete. (paragraph 2)

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