As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DECENT, BOTH CREW MEMBERS NOTICED AN ODOR RESEMBLING THAT OF AN OVERHEATED ELECTRICAL COMPONENT. SHORTLY BEFORE THE ODOR WAS NOTICED, THERE HAD BEEN AN INTERMITTENT FLASH OF THE MASTER WARNING LIGHTS BUT THE CAUSE COULD NOT BE DETERMINED. ALTHOUGH THERE WAS NO SMOKE OBSERVED OR ANY ASSOCIATED WARNINGS OR OBVIOUS MALFUNCTIONS, THE ODOR WAS ENOUGH OF A CONCERN TO ASK ATC FOR PRIORITY HANDLING AND AN EMERGENCY WAS DECLARED.