BY ORDER OF THE
SECRETARY OF THE AIR FORCE
DEPARTMENT OF THE AIR FORCE
INSTRUCTION 21-150
7 NOVEMBER 2022
Maintenance
AIRCRAFT REPAIR AND
MAINTENANCE CROSS-SERVICING
COMPLIANCE WITH THIS PUBLICATION IS MANDATORY
ACCESSIBILITY: This instruction is available for downloading from the e-Publishing
website at www.e-publishing.af.mil.
RELEASABILITY: There are no releasability restrictions on this publication.
OPR: AF/A4LM Certified by: SAF/AQD
(Ms. Angela L. Tymofichuk)
Supersedes: AFI 21-150, 11 September 2018 Pages: 10
This publication implements Air Force Policy Directive (AFPD) 25-3, Allied Logistics Support,
relative to leveraging maintenance capability across allied nations and implements AFPD 21-1,
Maintenance of Military Materiel. This DAFI provides the basic framework and guidance for
aircraft repair and maintenance services, a sub-category of logistics support, supplies, or services
in accordance with Air Force Instructions (AFIs) 25-301, Acquisition Cross Servicing Agreements.
This publication does not cover agreements with other U.S. military services or other government
agencies, U.S. or foreign non-military organizations, or commercial contractors. This Department
of the Air Force Instruction (DAFI) applies to all personnel (military, civilian, and contractors)
working for the United States Air Force (USAF) and United States Space Force (USSF), with
Acquisition and Cross-Servicing Agreement (ACSA). It applies to Air Force Reserve and Air
National Guard along with their subordinate units. Supplements to DAFI 21-150 are authorized
and must identify required deviations (applicability, variance, and/or differences in organizational
placement of responsibilities/processes) on the supplement with the abbreviation “(DEV)”. Place
“DEV” entry after the paragraph number and directly preceding the affected text (e.g., (AMC)
(DEV) Use the... or (ADDED-AMC) (DEV) Use the...). All supplements are submitted to the Air
Force Maintenance Division (AF/A4LM) at: AF.A4LM.Maintenance.Policy@us.af.mil for
approval. Refer recommended changes and questions about this publication to the Office of
Primary Responsibility (OPR) using the DAF Form 847, Recommendation for Change of
Publication; route DAF Form 847s from the field through the appropriate functional chain of
command. The authorities to waive wing, unit, delta, or garrison level requirements in this
publication are identified with a tier (“T-0, T-1, T-2, T-3”) number following the compliance
