User's Manual

UL-801 Installation Manual
Page 501
23-20-06 15 December 2011
Maintenance, Checkout, and Troubleshooting
1. UniLink Ground Checkout Procedures
A. Post Installation Test
For instructions on testing the UniLink following the initial installation in an aircraft, the
installer should refer to the installation Ground and/or Flight Test Plans that are part of the
UniLink installation (TC, STC, Field Approval) certification package.
The installation approval applicant should contact Universal Avionics Certification
Department for Ground and/or Flight Test Plan templates that can be used for developing
customized test plans.
B. Return to Service
The following defines the conditions under which tests, specified below, should be
conducted.
(1) Safety Precautions
User should follow all appropriate safety precautions.
(2) Power Input
Unless otherwise specified, tests should be conducted with the equipment powered by
the aircraft’s electrical power generating system.
(3) Associated Equipment or Systems
Unless otherwise specified, turn on all aircraft electrically operated equipment and
systems before conducting these tests.
(4) Environment
During tests, the equipment should not be subjected to environmental conditions that
exceed those specified by the equipment manufacturer.
(5) Warm-up Period
No warm-up period is required. However, some time must be allowed for all
associated equipment to boot up properly and stabilize.
C. UniLink to FMS/CDU Communications
NOTE: This procedure should be completed for each FMS/CDU connected to the
UniLink.
(1) Verify that DATA 1/4 page is displayed an active UNILINK prompt.
(2) From the DATA 1/4 page, press the UNILINK LSK [3R] and verify the UNILINK
MENU 1/2 page is displayed.
(3) Press RETURN LSK [5R]. Verify that the DATA 1/4 page is displayed.
(4) Repeat test steps 1 through 3 for each FMS/CDU connected and configured for
UniLink.