As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TRANSIT REVISION, THE LT REVERSER WAS OPEN AND LIGHT AND MESSAGE WAS IN DISPLAY. THE REVERSER WAS REVISED AND ICE AND SNOW WAS DETECTED INTO THE REVERSE. THE REVERSER WAS NOT CLOSED COMPLETELY BECAUSE A GAP OF 2 INCHES IS BETWEEN COVERS. THE CABLE BETWEEN ACTUATORS WAS REMOVED AND REVERSER WAS RETRACTED. THE AIRCRAFT WAS DISPATCHED BY MEL. DURING OVERNIGHT SERVICE THE REVERSER ACTUATOR WAS TRIMMED IAW MM, TEST CORRECT.