Built-In Test Equipment (BITE) on the Garrett Model GTCP331 APU Digital Electronic Control Unit PUBLIC ACCESS

[+] Author Affiliations
Stephen R. LaCroix, Richard F. Stokes

Garrett Turbine Engine Company, Phoenix, AZ

Paper No. 83-GT-186, pp. V005T13A010; 7 pages
  • ASME 1983 International Gas Turbine Conference and Exhibit
  • Volume 5: Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries
  • Phoenix, Arizona, USA, March 27–31, 1983
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7955-9
  • Copyright © 1983 by ASME


The advent of digital microprocessor electronic controls with decision making capabilities and airline interest in improved maintenance has resulted in the incorporation of powerful Built-In-Test-Equipment (BITE) in the latest Garrett gas turbine auxiliary power unit electronic control. BITE has been designed into the control to help isolate defective components and display this information. Garrett historical background and troubleshooting experience was combined with that of the Boeing Company, Messerschimitt-Bolkow-Blohm (MMB), and United Airlines (UAL) to obtain an effective system. Discussion includes BITE design philosophy, how the system functions, and how the information is displayed.

Copyright © 1983 by ASME
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