USAF Center of Excellence for Airworthiness
DEPARTMENT OF THE AIR FORCE AC-19-01
Headquarters Air Force Life Cycle Management Center (AFLCMC) 4 MAR 2019
Engineering Directorate
Wright-Patterson AFB OH 45433-7101
AIRWORTHINESS CIRCULAR
Military Flight Release (MFR) Updates
PURPOSE:
This Airworthiness (AW) Circular (AC) outlines the typical means to obtain an extension to an
MFR or to alter restrictions and/or limitations on an MFR. This AC will be incorporated into a
future AW Bulletin addressing AW Approvals.
SCOPE:
This AC applies to all MFRs issued by the USAF Technical Airworthiness Authority (TAA) or
Delegated Technical Authorities (DTAs).
ATTACHMENTS:
None.
REFERENCED DOCUMENTS:
None.
DISCUSSION:
MFRs are issued for specific air systems in design configurations that do not meet the full
standards and/or intent of a Military Type Certificate. MFRs typically expire on a given date or
upon reaching a flight hour limitation or service life limit. MFRs also may contain restrictions.
Extending an MFR or altering restrictions and/or limitations on an MFR requires approval by the
original approving authority (i.e., TAA or DTA). DTAs should consider the recommendations
herein when extending or altering restrictions and/or limitations on DTA-issued MFRs.
RECOMMENDATIONS:
1. To extend an MFR, the requestor will provide the AW Office a written request and a draft of
the new MFR no later than thirty (30) days prior to the expiration of the TAA-issued MFR.
The following information should be included or attached.
1.1. A description of changes in aircraft configuration, flight and maintenance manuals, and
test plans (if applicable) as related to those approved by the expiring MFR.
1.2. A list of any non-reportable MFRs based on the expiring MFR for any configurations to
be included in the new MFR. These MFRs and associated AW assessments will be
referenced in Section 8 of the new MFR.
1.3. Restrictions and/or limitations listed in the non-reportable MFRs identified in paragraph
1.2 that are still valid should be incorporated in the new MFR.
1.4. Fleet flight hours conducted under the expiring MFR and a list of any aircraft
approaching or exceeding the flight hour limitations or service life limit if listed on the
expiring MFR.
Distribution Statement A: Approved for Public Release (Case #88ABW-2019-1189)
