As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD 1 LOW PRESS CAUTION MESSAGE IN FLIGHT. FLT 4258,4391 CX-(EMERGENCY DECLARED). REMOVED AND REPLACED HOSE ASSY NR 1 FOR RESERVOIR PRESS AND HOSE ASSY FOR AC PUMP SUCTION, OPS CHECK GOOD AT THIS TIME. WORK DONE IAW AMM 29-10-00 (SDR CLOSED). (A)