As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THAT DURING THE CLIMB OUT, RECEIVED MW FUEL 2 LOW LEVEL. NOTICED A LOUD BANGING UNDER COCKPIT FLOOR. DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. R & R THE EBC NR 1 K0079 CONTACTOR. EBC NR 1 K0079 CONTACTOR. THE ACFT WAS RETURNED TO SERVICE.