What was found
ABORTED TAKEOFF BELOW 80 KIAS DUE TO POWERPLANT MESSAGE ON ENGINE DISPLAY. REMOVED AND REINSTALLED PROPELLER ELECTRONIC CONTROL UNIT IAW AMM 61-20-36-000-801 & 61-20-36-400-801. REMOVED & REPLACED POWER QUADRANT IAW AMM TASK 76-10-01-000-801, 76-10-01-400-801. INITIAL TROUBLESHOOTING FOUND POWERPLANT 198 MESSAGE NR 2 ENGINE. REMOVED & REPLACED 6100-3-K2 RELAY IN #1 JUNCTION BOX, DAUGHTER BOARD. IAW AMM 24-50-60-000-801, AMM 24-50-60-400-801. PERFORMED OPERATIONAL TEST OF AUTOFEATHER AMM 61-20-00-710-801, AMM 71-00-00-868-806 ENGINE POWER ASSURANCE CHECK, AMM 71-00-00-868-814 REVERSE MAXIMUM GOVERNING, AMM 71-00-00-868-816 NPT UNDERSPEED GOVERNING CHECK, AMM 71-00-00-868-817 FADEC TRIM FOR PLA, AMM 24-50-60-865, 24-50-60-710-020. PERFORMED TC 6710005 & 6710006. ALL CHECKS GOOD. RETURNED TO SERVICE.