Downloaded from https://www.everyspec.com ADS-79D-HDBK (Copies of these documents are available from sources as noted.) M.3 DEFINITIONS Acid Number (AN): A measure of the acidity of an oil sample expressed as the weight in milligrams of the amount of potassium hydroxide (KOH) required to neutralize one gram of the oil, as prescribed by the ASTM D664 (potentiometric) or ASTM D974 (colorimetric) test methods. Provides an indication of lubricant degradation. American Society for Testing and Materials International (ASTM): An international standards development organization. Army Oil Analysis Program (AOAP):
A program that implements equipment oil analysis testing as a quality management tool to enhance safety, conserve resources and to extend the life of major assemblies and components. AOAP is mandatory for all Army aircraft and select non- aeronautical equipment. Atomic Emission Spectroscopy (AES): A test used to determine the relative concentration of wear-metals and some oil additives in lubricating oil by measuring the intensity of the characteristic emission lines of atoms heated to a state of excitation by an electric arc or an induction heater. Provides the elemental content in an oil sample. Alarm Limits:
Set-point thresholds used to evaluate condition or performance data, which when exceeded, indicate a machinery or performance problem. At-line Tests: Tests performed at the flight line rather than in a laboratory. However the tests are not performed on-aircraft. Debris Sensor: A device that generates a signal proportional to the size and presence of wear-debris with respect to time. For example, a monitoring device that detects wear debris by fluctuation in a magnetic field. 237 2010, AIAA 2010-2858. Toms, A. M., “Detecting Bearing and Gear Failures through At-Line Wear Debris Analysis”, MFPT April 2010, Huntsville, AL Toms, A. M., E. Jordan, and G.R.
―The Success of Filter Debris Analysis for J52 Engine Condition Humphrey. Based Maintenance”, Proc. 41st AIAA, Tucson, AZ, July 2005 Toms, A. M., J.R. Powell and J. Dixon. “The Utilization of FT-IR for Army Oil Condition Monitoring”, presented at and published in Proc. JOAP International Condition Monitoring Conference, Humphrey, G. & R. Martin, ed., JOAP-TSC, Pensacola, FL (1998), pp. 170-176. Toms, L and A. Toms. ―Machinery Oil Analysis - Methods, Automation & Benefits‖, 3rd Edition, STLE, Park Ridge, IL, 2008, ISBN: 978-0- 9817512-0-7.