User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 1−58
15 Dec 2005
(1) Pre−Flight Test
The VSI/TRA self−test feature provides a convenient method to test the TCAS
system before takeoff.
NOTE: Self−test can be initiated at any time, on the ground or in flight (if not
disabled in air by grounding pin RBP−8E), by momentarily pushing TCAS
TEST. If TAs and RAs occur while self−test is activated in flight, the test
aborts, and the advisories are processed and displayed.
To perform self−test, push the TCAS TEST button on the control panel and monitor
the sequence that follows:
• Aural annunciation TCAS TEST is heard on audio system.
• Test pattern with fixed traffic and advisory symbols appears on the display for eight
seconds.
• Make sure the test pattern is as shown in Figure 1−18. The test pattern includes:
− An RA symbol at 3 o’clock, 2 nm, 200 ft above, in level flight
− A TA symbol at 9 o’clock, 2 nm, 200 ft below, climbing
− A proximate traffic symbol at 3.6 nm, 33 degrees right of the aircraft heading
(approximately 1 o’clock), 1000 ft below, descending
− A non−threat intruder (other traffic symbol) at 3.6 nm, 33 degrees left of the
aircraft heading (approximately 11 o’clock), 1000 ft above, in level flight
− Red and green resolution advisory VSI overlay indicating a don’t descend,
don’t climb > 2000 ft/min advisory
− TCAS TEST or RA OFF annunciation, depending on the capabilities of the
display.
• After 8 seconds, TCAS TEST PASS is announced, and the test pattern is replaced
with the normal VSI display.
• If self−test fails, TCAS TEST FAIL is announced, and TCAS FAIL appears on the
display. To obtain failure data, perform the extended test mode procedure in the
next section.