As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT ENGINE THRUST REVERSER ECAIS MESSAGE AND REV N1 WARNING INFLIGHT. COMPLIED WITH QRH 1-12 NO OTHER ABNORMALITIES NOTED. (ACFT RETURNED TO DEPARTURE AFTER T/O -- TOWER DECLARED EMERGENCY) PERFORMED OPS TEST OF THE THRUST REVERSER SYS IAW AMM 78-30-00. OPS CK GOOD. NO DEFECTS NOTED. PLACARD REMOVED, DEFER CLEARED.