What was found
DURING DESCENT AT AROUND 10,000 THE POWERPLANT MESSAGE APPEARED ON THE ED. REMOVED FROM SERVICE. C/W FIM TASK TASK 61-20-04-810-813 STEP 1-5(A)(1-5). FOUND FAULT CODE 160B. IN ARCDU. COMPLETED Q400 FIM 61-20-04-810-813 STEP 5A(6) THRU 6. OPS CHECKS GOOD. AS PRECAUTION, R+R #2 ENGINE DUAL PULSE PROBE IAW AMM 61-20-06-00/400-801. OPS CHECKS GOOD. AS PRECAUTION, R+R #2 ENGINE PEC HARNESS. OPS CHECK GOOD. PERFORMED FUNCTIONAL OF PEC CALIBRATION IAW AMM 61-20-36-720-801. CALIBRATION GOOD. PERFORMED ADJUSTMENT OF PEC SYNCROPHASE TRIM IAW AMM 61-20-36-820-801. ADJUSTMENT GOOD. NO DEFECTS NOTED AT THIS TIME. POWERPLANT CLEARED AND NO FAULTS IN CDS. AIRCRAFT RETURNED TO SERVICE.