As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT RECIEVED HYD NR3 LO PRES CAUTION MESSAGE(ENROUTE, ACFT DIVERTED DUE TO MX -- EMERGENCY DECLARED AS A PRECAUTION) FOUND O-RING AT UNION ON NR 3A ACCUSTIC FILTER DAMAGED. REPLACED O-RING IAW AMM 29-12-17. OPS AND LEAK CHECKS GOOD. ACFT OK FOR SERVICE AT THIS TIME. (CLOSED)