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Aeronautical Design Standard, United States Army Aviation and Missile Command - Qualification Requirements and Identification of Critical Characteristics for Aircraft Engine Components

Potential alternate manufacturing sources of aircraft engine parts, components, or
assemblies are required to provide substantiation that the specific item offered meets or
exceeds the identical item fumished by the original manufacturer in terms of service life,
strength, durability, form, fit, and firnction. The substantiation requirements for alternate
manufacturing source approval are included in this document. Candidates for alternate
source approval are required to submit to Army Aviation and Troop Command
(USAATCOM), Engineering Directorate a plan designed to meet the substantiation
requirements. The USAATCOM Engineering Directorate will review the plan to insure
that the proposed testing is sufficient to determine that the item to be manufactured will
be equivalent to the original. The Engineering Test Table (ETT) in the Flight Safety
Parts Information System (FSPIS) lists the testing that is normally required for alternate
sources which use material, castings, forging, and process sources approved by the prime
contractor or government for the item in question. Flight Safety Parts (FSP) and critical
characteristics are identified. A potential alternate manufacturing source requesting
approval is required to submit written substantiating data on a part, component, or
assembly to become a qualified vendor. This data should include, but not limited to, the
candidates capability to manufacture the item, a manufacturing plan (including sources
for forging, castings, etc.), and a test plan to satisfy engineering test requirements.

After USAATCOM engineering examines the data and determines that the alternate source is
capable of manufacturing the item in accordance with all of the existing requirements, the
alternate source will be added to the Potential Suppliers List. Should the alternate source
bid successfully, all quality assurance requirements, qualification tests, and engineering
tests must be completed prior to delivery of parts to the procuring agency. At the
discretion of USAATCOM engineering, previous suppliers who have not completed the
engineering test may be required to do so prior to the delivery of additional parts.