BY ORDER OF THE COMMANDER
AIR FORCE MATERIEL COMMAND
AFMC INSTRUCTION 21-126
19 JULY 2005
Incorporating Change 1, 28 JUNE 2016
Certified Current on 15 MAY 2020
Maintenance
TEMPORARY 2 (T-2) MODIFICATION
OF AEROSPACE VEHICLES
COMPLIANCE WITH THIS PUBLICATION IS MANDATORY
ACCESSIBILITY: This publication is 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.
OPR: HQ AFMC/LGMM
(MSgt Nepomuceno)
Supersedes: AFMCI21-126,
30 November 2000
Certified by: HQ AFMC/LGM
(Col Peaches Kavanaugh)
Pages: 28
This instruction establishes Air Force Materiel Command (AFMC) policy, implements the intent
of AFI 21-101, Aerospace Equipment Maintenance Management, AFPD 62-6, USAF Aircraft
Airworthiness Certification and AFPD 63-1, Acquisition System. The weapons System Program
Manager (SPM) is the modification approval authority for all aerospace vehicles under their
control. This instruction specifically prescribes procedures for managing, controlling,
documenting, and processing Temporary 2 (T-2) modifications of aerospace vehicles. This
instruction does not apply to the Air National Guard or US Air Force Reserve units and
members. This AFMCI may be supplemented at any level. Refer recommended changes and
questions about this publication to the Office of Primary Responsibility (OPR) using the AF
Form 847, Recommendation for Change of Publication; route AF Forms 847 from the field
through the appropriate functional chain of command. The authorities to waive wing/unit level
requirements in this publication are identified with a Tier (“T-0, T-1, T-2, T-3”) number
following the compliance statement. See AFI 33-360, Publications and Forms Management,
Table 1.1 for a description of the authorities associated with the Tier numbers. Submit requests
for waivers through the chain of command to the appropriate Tier waiver approval authority, or
alternately, to the Publication OPR for non-tiered compliance items. Ensure that all records
created as a result of processes prescribed in this publication are maintained in accordance with
(IAW) Air Force Manual (AFMAN) 33-363, Management of Records, and disposed of IAW the
Air Force Records Information Management System (AFRIMS) Records Disposition Schedule
