User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 7−9
15 Dec 2005
D. Return to Service Procedures
(1) For installations using serial data bus (ARINC 429) altitude data:
(a) The POST (automatic on power on) and PAST self test (initiated from the control
panel) are the only required Return to Service tests for the transponder.
(b) After the transponder passes these tests, the appropriate logbook entries may
be made and the unit is ready for use.
(2) For installations using parallel (Gillham code) altitude data:
(a) The POST (automatic on power on) and PAST self test (initiated from the control
panel) must be passed.
(b) Connect an air data tester to the aircraft pitot/static system and set up a
transponder ramp tester.
(c) Setup the air data tester to output the following altitudes. The transponder’s
encoded altitude must correspond.
• 11,700 feet
• 24,400 feet
• 30,800 feet.
NOTE: These three altitudes check the operation of all parallel altitude wires.
(d) After the transponder passes these tests, the appropriate logbook entries may
be made and the unit is ready for use.