D3241 was last subjected to a major re-write in the mid-1990s when a second type of test apparatus was added. The method now encompasses testing conducted on three separate types of equipment but no systemic modifications were made to identify/add information for the third type. The procedure part of the method is now very confusing as it refers to operations that are no longer typical and does not give an accurate picture of what is being done. In the interim the first two types of instrument have become obsolete with no (type 1) or limited (type 2) support available. At the same time the mandatory information is full of text that applies primarily to this obsolete equipment that is better covered in the applicable original manuals which the method requires the users have on hand. There is also a desire in the subcommittee upgrade the method to better reflect the true purpose of the test. While it is typically used in pass/fail fashion the method validity is rooted in historical understanding of the ability to determine the relative thermal oxidative stability of a given jet fuel. That technique, the Breakpoint, is now referenced in the non mandatory information. The plan is to move that methodology into the mandatory part of the method (while allowing for continued use on a pass/fail basis as has been practiced successfuly for four decades). The subcommittee is also interested in having more background on the test and its practical meaning in the non-mandatory information. This is a major task and may take several steps, ballot wise, to accomplish.
Keywordsdifferential pressure; fuel decomposition; oxidative deposits; test filter deposits; thermal stability; turbine fuel: Aviation turbine fuels; Fuel degradation; JFTOT (jet fuel thermal oxidation tester); Oxidation testing--petroleum products; Thermal oxidation stability; Thermal stability--petroleum products;
Draft Under Development