What was found
(CAN) PILOT REPORTED THAT HE RAN OUT OF NOSE DOWN ELEVATOR TRIM WITH FLAPS 30 DEGREES. INSPECTED FLAP TRIM INTERCONNECT AND FOUND NO FAULTS. INSPECTED ELEVATOR TRIM AND FOUND THAT NOSE DOWN TRIM WAS LIMITED BY A STOP IN THE COCKPIT TRIM WHEEL. FOUND THAT PIN THAT RIDES IN GROOVE IN TRIM WHEEL & DRIVES TRIM POSITION INDICATOR HAD POPPED OUT AND INTO NEXT GROOVE. REPOSITIONED IN APPROPRATE LOCATION & OPS CHECK OK. RERIGGED POSITION INDICATOR AND TEST FLEW AIRCRAFT, OPS NORMAL.