As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN-ROUTE AFTER LEVEL OFF, RECEIVED CROSS FLOW PUMP CAUTION MSG PER QRH SHUT DOWN ENGINE NR 2. DECLARED EMERGENCY RETURNED TO FIELD IN SLC. (FLT 3708) CLOSED REMOVED AND REPLACED FQCU IAW AMM. ALSO REMOVED AND REPLACED BI-CROSS FLOW CARTRIDGE PUMP IAW AMM. OPS AND LEAK CHECK GOOD AT THIS TIME.