As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED R REV UNLOCK CAS MESSAGE JUST BEFORE V1 ON TAKEOFF FROM CAK. CREW RETURNED TO CAK AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THRUST REVERSER SYSTEM AND REMOVED AND REPLACED THE FOLLOWING COMPONENTS FOR THE RIGHT THRUST REVERSER: PDU (POWER DRIVE UNIT), INBOARD LOWER INBOARD ACTUATOR AND BOLT, UPPER OUTBOARD ACTUATOR, UPPER INBOARD ACTUATOR LINK AND UPPER FLEX SHAFT. MAINTENANCE PERFORMED CHECKS. ALL WORK ACCOMPLISHED BY MAINTENANCE USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.