As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT REV AMBER ON N1 OF RH ENGINE CAME ON SEVERAL TIMES AND THEN R REV UNLOCK CAUTION ILLUMINATED AND WENT AWAY. SECOND TIME IT ILLUMINATED, DECLARED EMERGENCY AND LANDED. MX REPLACED RH THRUST REVERSER POWER DRIVE UNIT. OPS CHECK GOOD.