As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL360 RECEIVE "HYD QTY 1 LO" EICAS MESSAGE. SELECTED HYD SYNOPTIC PAGE ON MFD AND NOTICED THE HYD QTY 1 WAS AT 16 PERCENT AND RAPIDLY DROPPING. WITHIN MINUTES QUANTITY AND PRESSURE WERE AT 0 AND ASSOCIATED EICAS MESSAGE APPEARED. RAN QRH, DECLARED AN EMERGENCY, AND DIVERTED TO CMH. LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED NR 1 HYD PRESSURE LINE IAW MM 20-10-03 AND SERVICED HYD SYSTEM. NO LEAKS NOTED.