AFMCI21-100V1_AFSCSUP — Depot Maintenance Principles

AFMCI21-100V1_AFSCSUP governs AFSC depot maintenance principles and guidance for aircraft and associated aerospace equipment.

Search AFMCI21-100V1_AFSCSUP

  • Publication number: AFMCI21-100V1_AFSCSUP
  • Title: Depot Maintenance Principles
  • Date: 2025-07-23

View AFMCI21-100V1_AFSCSUP on armypubs.army.mil


It establishes requirements for industrial-area eye protection, non-routine work certification, and Work Control Document validation. It also addresses the Team Spirit Inspection Program and reverse team spirit inspections, including funding, visits, and documentation.

Applies to: This instruction implements Air Force Policy Directive (AFPD) 21-1, Maintenance of Military Materiel, and provides directive guidance for maintenance management at the Air Force Materiel Command (AFMC) Centers organic depots as it applies to aircraft and associated aerospace equipment.

Topics covered

  • Industrial-area eye protection
  • Non-routine maintenance work
  • Work Control Document certification
  • Team Spirit Inspection Program
  • Reverse Team Spirit Inspections
  • Depot maintenance assessments

Questions and answers

What eye protection is required in an industrial work area?

While in an industrial work area (inside the yellow lines and other designated eye hazard areas), all personnel, including visitors, will at a minimum, wear safety glasses with side protection (side shields or wrap around style glasses) meeting ANSI/ISEA Standard Z87.1. (paragraph 5)

When is the industrial-area safety-glasses requirement excepted?

The only exception to this policy is when work is at a complete stop (i.e., designated breaks, mealtimes, or times of assembly like shop meetings or ceremonies). (paragraph 5)

What technician is selected when non-routine work has no PAC-certified technicians available?

Non-routine work for workloads already established but not accomplished for an extended period of time, or in cases where no PAC-certified technicians are available, will require selecting the best qualified journeyman technician to perform the task under the direct oversight of the supervisor and an appropriate OC-ALC Group Production Engineering authority. (paragraph 5)

How is TSIP funded?

TSIP is a voluntary program funded by the owning unit. (paragraph 5)

How is RTSI funded?

RTSI is a voluntary program funded by the performing depot. (paragraph 5)

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