As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD PUMP DEM C1 LOW CENTER HYDRAULIC DEMAND PUMP NR 1 PRESSURE WHEN COMMANDED ON, OR CENTER DEMAND PUMP NR 1 OVERHEATED. RPLC'D C1 ADP HYDRAULIC PUMP, NO HELP. MODULATING SOV OPERATES AND PNEU PRESS AVAIL TO AIR DRIVE UNIT. INOP ADP PER MEL 2911F. NEEDS ADP.