BY ORDER OF THE
SECRETARY OF THE AIR FORCE
AIR FORCE INSTRUCTION 21-101
16 JANUARY 2020
AIR NATIONAL GUARD
Supplement
AIRCRAFT AND EQUIPMENT
MAINTENANCE MANAGEMENT
COMPLIANCE WITH THIS PUBLICATION IS MANDATORY
ACCESSIBILITY: Publications and forms are available for downloading or ordering on the e-
Publishing website at www.e-publishing.af.mil
.
RELEASABILITY: There are no releasability restrictions on this publication.
Certified by: SAF/AQD
(Ms. Angela L. Tymofichuk)
Pages: 396
(ANG)
OPR: AF/A4LM
Supersedes: AFI 21-101, 1 May 2015; AFI 21-110,
16 Jun 2016; AFI 21-123, 3 Feb 2017; AFI 21-124, 12
Jan 2017; and AFI 21-136, 3 Feb 2017
OPR: NGB/A4MM
Supersedes: AFI21-101_ANGSUP, 4 March 2016;
AFI21-123_ANGSUP, 4 May 2015
Certified by: NGB/A4
(Col Matthew H. Reynolds)
Pages: 54
This publication implements Air Force Policy Directive (AFPD) 21-1, Maintenance of Military
Materiel. It is the basic Air Force Instruction (AFI) for all weapon system and support equipment
maintenance management guidance. It provides the minimum essential guidance and procedures
to safely and effectively maintain, service, and repair weapon systems and support equipment.
This publication applies to all military and civilian members of the Regular Air Force (RegAF),
Air Force Reserve (AFR) and Air National Guard (ANG) and those with contractual obligation to
comply with Air Force publications. Supplements and addendums are written in accordance with
(IAW) AFI 33-360, Publication and Forms Management. Supplements must identify and
23 SEPTEMBER 2020
Corrective Action applied on, 15 July 2021
Corrective Action applied on, 30 July 2021
Maintenance
