Rationale

Rational for revision Analysis of D3241 data collected on Jet A/A-1 produced from 2022-2024 indicated that the vast majority of fuels test at 1 or <40 nm at production and that a higher rating at production could result in an off specification reading downstream. The elevated reading (i.e. <2 - <3 via VTR and/or 40 - 85 nm via metrology) is technically in specification but unusual within the population of jet fuel data. To alert users, a note is proposed in Section X1.3 of the nonmandatory Appendix. Supporting data is provided in the attached presentation. The motion to ballot was approved at the December 2024 Subcommittee J meetings in Anaheim, CA. To the extent possible, Subcommittee J tries to keep D1655 and D7566 as consistent as possible. Therefore, this item is linked with the equivalent item for D7566 within this same ballot. If a negative that cannot be resolved is received on one of these items, neither item moves forward.