User's Guide

User Guide for the Envoy Data Link
Document Number: UG-15000 Rev. A Page 24 of 173
Fault data is persisted and can be viewed in detail by maintenance crew.
Severity 1 errors display in amber text and the FAIL annunciator illuminates. The example in Figure
2-6 is a load error that requires factory repair:
Figure 2-6 Load Error
2.4 System Initialization
On startup, the Envoy loads and verifies aircraft data and configuration information from the
Personality Module:
• aircraft tail number
• TSAP database
• AOC customizations for ACARS pages and messages
• unit preferences (metric or English)
• color scheme
Bus-fed data from FMC, ADC, DFDAU or other linked devices include:
• UTC time
• Aircraft status
• Flight information
Airplane ID, status, and time are automatically populated on all affected Envoy pages and pages
that require a manual refresh include a REFRESH action, typically at LSK 5.
For ACARS, flight data included with typical messages needs to be verified or correctly entered on
the Flight Initialization page.
Log files and reports are available for viewing and can be downloaded to the AOC:
• Message logs – ATC MSG LOG, ACARS MSG LOG
2.4.1 System Status
System monitor and system configuration data can be viewed or downloaded (see Section 6.3).
2.5 Network Connectivity and COMM Media
The Envoy uses Data Link Service Provider (DSP) information and details from the last COMM
session to establish data link communication. At system start up, the Envoy scans for the last