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Field Service Tool (FST)
The Field Service Tool (FST) is diagnostic software that identifies fault codes (Appendix C in the
TEO-540-A1A Engine Maintenance Manual) and engine operation information to be used by
ground-based support personnel to:
• View fault codes from the ECU
• Upload fault codes from the ECU
• Monitor ECU operation
• Upload data from the data logger (if needed)
The EECS collects internal fault log data and external fault log data. Maintenance personnel use this
data for diagnostic and continuous airworthiness.
Access to this tool is through a laptop where the software is installed and through an established link
with the EECS for the engine using the iE
CAN Interface (ST-530) connected to an RCA jack on the airframe engine wiring harness.
System Description
Page 4
TEO-540-A1A Engine Installation and Operation Manual
2
Service Cable (ST-528) and the iE
Figure 5
EECS Overview
© 2018 Avco Corporation. All Rights Reserved
2
Field Service Tool
October 2018
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