As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE WHEEL STEERING INOPERATIVE CAUTION MESSAGE IN FLIGHT, COMPLIED WITH QRH MESSAGE NO LONGER EXISTS, SEEMS TO FAIL INTERMITTENTLY ANYWHERE FROM EVERY 5 TO 20 MINUTES. EMERGENCY DECLARED, ACFT RETURNED TO DEPARTURE. R & R ELECTRO-HYDRAULIC MODULE IAW AMM 32-51-15, OPS & LEAK CHECKED GOOD.