As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LIFTOFF (KATL) ENG NR 1 THRUST REVERSER SHOWED "UNLOCKED". ON TAKEOFF ROLL LIGHT FLICKERED MOMENTARILY THEN WENT OUT. FOLLOWED QRH AND ECAM PROCEDURE AND DECLARED EMERGENCY. REPLACED NR 1 THRUST REVERSER PRESSURE REGULATOR SHUTOFF VALVE PER A310-200 AMM 78-31-05-4 03 AND VALVE CONNECTOR DH9 PER AIRBUS ESPM. NR 1 REVESER OPS CHECKS GOOD.