As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 HYD QTY INDICATION REDUCED TO ZERO. INITIAL ASSOCIATED ROLL SPLR INBD HYD AND #1 HYD ISO VLV MASTER CAUTIONS ILLUMINATED, THEN EXTINGUISHED WHEN QTY REACHED ZERO. FOLLOWED BY #1 ENGINE HYD PUMP MASTER CAUTION. REMOVED FROM SERVICE. REPLACED LEAKING #1 EDP AND #1 SYSTEM FLUSH. OPS AND LEAK CHECKS GOOD. RETURNED TO SERVICE.