As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DUE TO AN ENGINE WARNING LIGHT FOLLOWED BY A KNOCKING NOISE IN THE ENGINE. AIRCRAFT REQUESTED TO RETURN TO CLT AND LANDED WITHOUT INCIDENT. RTF - L FADEC FAULT 1 STATUS MESSAGE FOLLOWED BY L FADEC CAUTION MESSAGE DURING CRUISE. INSTALLED L/H ENGINE W2 BLUE CABLE IAW CRJ 700 AMM 73-22-03-400-801. PERFORMED FUNCTIONAL TEST OF L/H T/R SYSTEM IAW CRJ 700 AMM 78-30-00-720-801. ALL OPS CHECKS GOOD AT THIS TIME. FADEC FAULT MESSAGE HAS NOT RETURNED.