As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
C-HYD DEM PUMP EICAS AND PRESS LIGHT ILLUM WITH AIR DEM PUMP SWITCH IN ON POSITION ONLY WITH POWER AT IDLE. SUSPECT MAYBE C1 DEMAND PUMP LOW OUTPUT. REPLACED ADP, NO HELP. SUSPECT OVERSPEED CARD. REPLACED SPEED CARD, NO HELP. REPLACED ADP PRESSURE REGULATOR VALVE, OPERATES OKAY.