What was found
MACH TRIM AND STAB TRIM MESSAGE, 200 FEET AFTER TAKEOFF. FLIGHT 5141-FILED CLOSED. THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 22160283 WITH THE FOLLOWING CORRECTIVE ACTION: "TROUBLESHOT PER CRJ200 FIM 27-40-00 PG 28,29 LABEL 273 BIT 16 AND 17. REMOVED AND REPLACED THE MCU, REF CRJ200 AMM 27-42-05. NO DEFECTS NOTED AT THIS TIME. COMPLIED WITH TASK CARD 34-220-1008-SKY. AIRCRAFT OKAY FOR SERVICE AT THIS TIME. FOUND NO HISTORY OF STAB TRIM/MACH TRIM ISSUES IN THE PAST 3 MONTHS, REF CP 22160446 FOR PARTS INFORMATION AND TASK CARD COMPLIANCE.