Downloaded from https://www.everyspec.com ADS-79D-HDBK APPENDIX G TURBOSHAFT ENGINE AND AUXILIARY POWER UNIT (APU) CONDITION BASED MAINTENANCE (CBM) G.1 PURPOSE AND SCOPE The purpose of this Appendix is to provide methodology and guidance to transition U.S. Army maintenance of gas turboshaft engines and auxiliary power units to condition based maintenance. This Appendix covers the use of sensors, engine usage monitoring, diagnostic and prognostic algorithms, performance trending, power assurance checks, oil and fuel monitoring, and methodology verification & validation.
Further, it recommends the minimum technical requirements for a turboshaft engine health monitoring systems for condition based maintenance. Condition based health monitoring on turbofan, turbo prop, rotary, diesel, electric, and other type aircraft engines are not specifically addressed in this appendix but may be added at a later date depending on the need. G.2 REFERENCES AND APPLICABLE DOCUMENTS G.2.1 Standards. (Copies of these documents are available online at http://www.astm.org or from the ASTM International, 100 Barr Harbor Drive, P.O.
Box C700, West Conshohocken, PA 19428-2959.) (Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111- 5094.) (Copies of this document are available from http://www.rtca.org/ or RTCA, Inc., 1150 18th Street, NW Suite 910, Washington, DC 20036, Tel: 202-833-9339, Fax:
202-833-9434 info@rtca.org (Copies of this document are available from http://ftp.rta.nato.int/public//PubFulltext/RTO/TR/RTO-TR- 028///tr-028-$$toc.pdf or BP 25, 7 Rue Ancelle, F-92201 Neuilly-Sur-Seine Cedex, France) 111 ASTM INTERNATIONAL (AMERICAN SOCIETY FOR TESTING AND MATERIALS) ASTM D2276 Standard Test Method for Particulate Contaminant in Aviation Fuel by Line Sampling. MILITARY STANDARDS MIL-STD-882E DOD Standard Practice for System Safety, 11 May 2012. Radio Technical Commission for Aeronautics (RTCA) RTCA DO-178B Software Considerations in Airborne Systems and Equipment Certification.
North Atlantic Treaty Organization Research and Technology Organization (RTO) RTO TR 28 Recommended Practices for Monitoring Gas Turbine Engine Life Consumption, North Atlantic Treaty Organization, Research and Technology Organization, April 2000.