As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SYR-BOS FLIGHT#3848. CREW REPORTED #1 ENGINE OIL PRESSURE INDICATION WENT TO ZERO, ENGINE SHUT DOWN AS A PRECAUTION. EMERGENCY DECLARED, AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND FOUND CIRCUIT BREAKER K5 POPPED. WIRING INSPECTED AND CANNON PLUG AT PRESSURE SWITCH CLEANED. AIRCRAFT RAN FOR 30 MINUTES, OPERATIONAL CHECK GOOD.AIRCRAFT RETURNED TO SERVICE.