What was found
DESCENDING THROUGH FL260, CREW RECEIVED AN EFIS MISCOMPARE, COMM 2 FAIL, MFD 2 FAIL, AND CROSS TALK FAIL ACCOMPANIED BY A STRONG ELECTRICAL SMELL ON THE FLIGHT DECK. AIRCRAFT LANDED WITHOUT INCIDENT AT KEFD. SWAPPED RH AND LH PFD. REPLACED PFD LOCATED IN THE RH LOCATION (LH LOCATION PRE-SWAP) IAW CL 300 AMM 31-61-01. DIAGNOSED EFIS MISCOMPARE, PERFORMED TAXI TO MULTIPLE LOCATION AND RECORDED VARIOUS HEADING SPLITS. PARKED AIRCRAFT AND RECORDED A 3-DEGREE SPLIT (WHICH IS IN TOLERANCE). SPOKE TO BOMBARDIER FSR AND CONCLUDED THAT >3-DEGREE SPLITS WERE LIKELY CAUSED BY METAL IN THE RAMP. WORK COMPLETED IAW AMM 34-21-01. REFERENCE ADVISORY WIRE AW 300-34-0104 FOR AIRPORT CAUSED ANOMALIES. ALL SYSTEM OPS CHECKS GOOD.