As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION - TCAS FAIL ENROUTE. TCAS WAS ALSO REPORTING REVERSE SENSING OF TRAFFIC. BEFORE COMPLETE FAILURE TCAS FLAGS IN BOTH VSI INDICATORS PLUS CDTI. CARRIED OUT TCAS EXTENDED MX TEST IAW AMM 34-45-00-5 7. AT ATC/TCAS CONTROL PANEL USING SELECT CODE 0001 FOUND RA NR 1 FAULT. R & R CAPTAIN'S VSI IAW AMM 34-22-06-4. PERFORMED TCAS EXTENDED MAINT TEST AND TCAS COMPUTER SELF TEST IAW AMM 34-45-00-57 AND TCAS TEST PASSED.