As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO TCAS ON RADAR FOR 45 MIN. PULLED F12 C/B WAITED FOR 5 MIN AND THEN TRIED 10 MIN WOULD NO RESET. CAME ON BRIEFLY FOR ABOUT 5 MIN THEN WENT OUT AGAIN FOR 15 MIN, COME ON AGAIN ENROUTE. REPLACED TCAS PROCESSOR IAW AMM. ALSO SHOOK DOWN WIRING AT CONTROL PANEL AND RACK CONNECTOR. RMVD RT ATC XPONDER AND CKD PINS DUE TO PREV REPORT OF PUSHED BACK PIN. ALL OPS CKS GOOD.