As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - FLT NR 591 - AFTER TAKEOFF AT APPROXIMATELY 2000, NR 1 THRUST REVERSER LIGHT FLICKERED ON AND OFF. AT 3000, THE PROCEDURE LIGHT CAME ON STEADY. CREW ELECTED TO RETURN TO FIELD. NO EMERGENCY DECLARED. MEL WAS ADDED AND FLIGHT DEPARTED TO SDF WITH DELAY. ADJUSTED THE LOWER AND UPPER DOOR SWITCH AND ACTUATOR SWITCH. (M)