Failure Detected During Self-Test; Test Results Not To Specifications; Dual Mode S Equipped Aircraft - Honeywell CAS-100 Maintenance Manual

CAS-100 COLLISION AVOIDANCE SYSTEM
(3)

Failure Detected During Self-Test

If a failure is found during self-test, the voice message output from the TCAS processor
is, TCAS System Test Fail. The PPI Radar/TCAS display or dedicated display will show
the failed system component(s).
Possible traffic display fault annunciations are as follows:
• TCAS PROCESSOR
• UPPER ANTENNA
• LOWER ANTENNA
• RADIO ALT No. 1
• RADIO ALT No. 2
• RADIO ALT No. 1 and No. 2
• No. 1 XPNDR DATA BUS
• No. 2 XPNDR DATA BUS
• TRAFFIC DISPLAY
• RA DISPLAY No. 2
• RA DISPLAY No. 1 and No. 2 • NO TCAS (NO DATA on some versions)
• TCAS FAIL
(4) Test Results Not to Specification
If self test results are not to specification, do these:
(a) If PPI or dedicated display is used, check and record the fault annunciation(s). For
the Mode S transponder system and TCAS line maintenance troubleshooting
procedures, refer to Tables 1001 and 1002.
(b) Do the Mode S and TCAS processor self tests on the front of each unit to make the
problem clear in non-PPI or dedicated display aircraft.
(5)

Dual Mode S Equipped Aircraft

Set the transponder selector on the CTA-81A to 2 to test transponder 2 in an aircraft with
two Mode S units. Turn the function selector to TA for 10 seconds (minimum), then do
again step 2.B.(1).
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
MAINTENANCE MANUAL
• XPNDR TOP ANT
• XPNDR LOWER ANT
• XPNDR TCAS DATA
• XPNDR CONTROL DATA
• XPNDR CONTROL DATA
• XPNDR CONTROL DATA
• No. 1 XPNDR ALT DATA
• No. 2 XPNDR ALT DATA
• ATTITUDE•RA DISPLAY No. 1
• HEADING
34-45-47
Page 1004
1 Dec 2003