Legacy System
Maintenance,
Enhancements & Replacements
Propulsion

Image:  TF34 CDD (CETS Download Device) software has been upgraded and is being maintained by the Aerospace Systems Engineering Section at Southwest Research Institute. Click image for larger view.

Click image for enlarged view. 
TF34 CDD (CETS Download Device) software has been upgraded and is being maintained by the Aerospace Systems Engineering Section at Southwest Research Institute.

 

Image:  The chart shows the fleet-level view of a health metric called Remaining EGT Margin, an indication of cumulative performance degradation based on the number of degrees remaining before a hard temperature limit is incurred and the engine must be removed. Click image for larger view.

Click image for enlarged view. 
The chart shows the fleet-level view of a health metric called Remaining EGT Margin, an indication of cumulative performance degradation based on the number of degrees remaining before a hard temperature limit is incurred and the engine must be removed.

 

Image:  JETT running an F108 engine health trend. Click image for larger view.

Click image for enlarged view. 
JETT running an F108 engine health trend.

Engine Performance and Ground Station Software Development

The TF34 CDD (CETS Download Device)

  • The TF34 CDD (CETS Download Device) software has been upgraded and is being maintained by the Aerospace Systems Engineering Section at Southwest Research Institute (SwRI). This software allows a Commercial Off-The-Shelf (COTS) laptop to download engine data from a TF34 engine and transfer it to another computer running the Comprehensive Engine Trending And Diagnostic Software (CETADS).

Comprehensive Engine Trending and Diagnostic Systems

  • Each engine requires a different engine-specific CETADS. Several engine specific CETADS variants (including the F108 and F100) have been upgraded and moved into an Oracle database, while maintaining all of the functionality that existed prior to the conversion. CETADS data is intended to be pushed to the Engine Health Management Plus Data Repository Center (EHM+DRC), where it will be available for other tools to use on a fleet-wide basis.

Jet Engine Trending Tool

  • The Jet Engine Trending Tool (JETT) has been developed to make use of data consolidated in the EHM+DRC. Initially the F108 and TF39 versions were developed, followed by the F100 and TF34. One tool that uses data stored in the EHM+DRC has been developed for several engines using SwRI-developed engine trending algorithms for that engine. This web-based tool provides a more user-friendly, visual representation of the available data, using the engine trending algorithms previously developed for that engine. JETT leverages COTS tools to provide whole-fleet views and engine trending, diagnostics, and data extrapolation.

JETT allows the user to drill down to a particular:

  • Major command (MAJCOM)
  • Base
  • Aircraft serial number (ASN)
  • Engine serial number (ESN)

JETT can be used to generate and send reports based on engine data. The data are displayed in a simple, easy to read dashboard layout; a more advanced query environment is also included, as is a report structure including both pre-generated reports and the ability for users to create new reports in the future as they are needed.

JETT is intended to be used by:

  • Engineering
  • Logistics
  • MAJCOMS
  • Field users
  • Air Force Research Labs (AFRL)

to provide an engine health assessment at the applicable level:

  • Fleet
  • MAJCOM
  • Base
  • ASN
  • ESN

Each engine type/model/series uses a customized version of JETT.

Related Terminology

aircraft engine performance  •  ground station software  •  CEDADS  •  jet engine trending tool  •  JETT  •  engine health management plus  •  EHM+  •  EHM Plus

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Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 10 technical divisions.

04/15/14