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...Astm d clearinghouse guide introduction this document provides candidate alternative fuel producers with procedures for engaging the to conduct evaluations of their prospective fuels in accordance standard practice qualification and approval new aviation turbine additives a framework use commercial gas engines process procedure are intended facilitate incorporation into specification containing synthesized hydrocarbons consists annexes which define physical chemical property requirements individual types meeting can be reidentified as jet enter fungible distribution system conventional those that do not meet criteria specified any current considered must found fit purpose aircraft by oems design produce products before it incorporated annex determination is based on data information generated during evaluation graphically depicted figure two phase relies oem faa review test after each ffp page because iterative nature where provide feedback at stage was established monitor step see cal...