Honeywell CAS-100 Maintenance Manual page 146

CAS-100 COLLISION AVOIDANCE SYSTEM
(6) Self-Test Using CTA-81( ) Indicators
The following self-test data applies to the CTA-81( ) indicators:
(a) Control unit ATC FAIL lamp monitors the transponder functions only.
(b) On the control unit, letter R comes on in the TEST. The letter R comes on in the
ATC-2 position for the aircraft that have a non-Mode S transponder. The letter R
does not come on during usual Mode S operation in ATC-1 or ATC-2.
(c) The TCAS will not operate when the ATC FAIL lamp comes on. The TCAS system
must have a serviceable Mode S transponder selected to function correctly.
CAUTION:REMOVE THE POWER BEFORE REPLACING A MODE S OR TCAS
Refer to Table 1001 and Table 1002 for Line Maintenance Troubleshooting Procedures.
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MAINTENANCE MANUAL
SYSTEM COMPONENT. DAMAGE TO THE EQUIPMENT CAN
RESULT
34-45-47
Page 1005
1 Dec 2003