AFMCI21-126_EGLINAFBSUP — Temporary 2 (t-2) Modification Of Aerospace Vehicles

AFMCI21-126_EGLINAFBSUP governs the management, control, documentation, and processing of Temporary 2 modifications of aerospace vehicles.

Search AFMCI21-126_EGLINAFBSUP

  • Publication number: AFMCI21-126_EGLINAFBSUP
  • Title: TEMPORARY 2 (T-2) MODIFICATION OF AEROSPACE VEHICLES
  • Date: 2017-10-31

View AFMCI21-126_EGLINAFBSUP on armypubs.army.mil


The publication addresses modification classification, approval authority, safety requirements, demodification plans, flight releases, revalidation, contracted modifications, and funding reimbursement. It requires compliance with prescribed procedures and documentation, including requirements for safety determinations, flight releases, and residual configurations.

Applies to: This instruction does not apply to the Air National Guard or US Air Force Reserve units and members.

Topics covered

  • T-2 modification classification
  • Stores compatibility and flight clearances
  • Safety of Flight determinations
  • Demodification plans
  • Temporary flight releases
  • Modification revalidation
  • Contracted modifications and lease or loan agreements
  • Funding reimbursement

Questions and answers

How are T-2 modifications classified?

All T-2 modifications, to include hardware/software, will be classified as either Major or Minor. (paragraph 4)

What makes a T-2 modification Major?

A modification will be classified as Major if it involves a high degree of technical uncertainty, and it affects critical portions of one or more of the following areas: structure, propulsion sub-systems, avionics systems, software, aerodynamics, stability and control, etc. (paragraph 4)

Who issues recommended flight clearances for stores?

The Air Force SEEK EAGLE Office (AFSEO; 96 SK) issues only recommended flight clearances (RFC) or stores modification assessments (SMA) for developmental and operational flight test activities involving changes, both hardware and software, to certified and uncertified stores to include changes in carriage quantity and/or location. (paragraph 4)

How long can a temporary flight release last?

When a final flight release cannot be issued (e.g., an incomplete modification/demodification not affecting flight safety or a program requirement), then an AFMC Form 243 of up to 180 days may be issued by the responsible CCB authority.

What happens if the SPM does not concur with revalidation?

In the event that the SPM does not concur, the test article will be fully demodified and the organization funding the modification will be responsible for funding the demodification.

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