As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LOSS OF SYSTEM A-HYDS AT FL270, INDICATED BY SYSTEM A-FLT CONTROL LOW PRESSURE & FEEL DIFF PRESSURE LIGHT AND A-QTY AT .5 GALLONS. ACRFT RETURNED TO AIRPORT. FLT CONTROL MODULE A-SYS REPLACED. ALSO BOTH A & B CASE DRAIN FILTERS & BOTH A-SYS HYD EDPS REPLACED. TIMES- 58129.50 CYCLES- 54334.