Bulletin 133
This document defines the fuel quality requirements for supply into Jointly Operated Fueling Systems operated to JIG Standards. The Aviation Fuel Quality Requirements for Jointly Operated Systems (AFQRJOS) for Jet A-1 embodies the requirements of the following two specifications:
(a) British Ministry of Defence Standard DEF STAN 91-091/Issue 12 14th September 2020 for Turbine Fuel, Kerosene Type, Jet A-1, NATO Code F-35, Joint Service Designation: AVTUR.
(b) ASTM Standard Specification D1655 for Aviation Turbine Fuels “Jet A-1” (Latest issue).
Jet fuel that meets the AFQRJOS is usually referred to as “Jet A-1 to Check List” or “Check List Jet A-1” and, by definition, allows custodians of the fuel to supply against either of these specifications.
AFQRJOS is normally revised and published annually but if urgent issues need to be addressed it may be revised more frequently.
Issue 32 of the checklist introduces the following changes:
Introduction of maximum limits for particle counting and information that it is the Authority’s intention to make it the referee method from April 2025 within Def Stan 91-091
• Suppression of IP 564 as an approved method for particle counting and addition of test method D7619 : standard test method for sizing and counting particles in light and middle distillate fuels, by automatic particle counter
• Prohibition of the use of specific batches of suitable Fluorescent Indicator Dyed Gel when measuring Aromatic Content by ASTM D1319 or IP 156.
• Approval of co-processing of hydrocarbons derived from synthesis gas via the Fisher Tropsch process producing co-hydroprocessed hydrocarbon synthetic kerosene as an acceptable process for jet fuel manufacture as controlled by Defence Standard 91-091 and ASTM D1655.
• Suppression of the bias for flash point measurement between IP 170 and ASTM D56
• Addition of Test Method D93 (Procedure A) – Standard Test method for flash point measurement by Pensky-Martens close cup tester and D7236 – standard test method for flash point by small scale closed cup tester (ramp method).
The specifications and test methods are fully detailed in the document.