As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE OVERSPEED FAIL LIGHT DID NOT EXTINGUISH ON CAD. T/F: #1 OVSP FAIL LIGHT DID NOT EXTINGUISH ON CAD. AFTER PREVIOUS FAULT ON #2 SIDE, OVERSPEED BOXES WERE SWAPPED. FAILURE FOLLOWED THE SWAPPED BOX FROM THE #2 SIDE TO THE #1 SIDE. REPLACED #1 OVERSPEED BOX (ARRIEL SPC : 77-31-80-01-010Q) IAW AMM 80-20-00 4-1.