As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE C ADP INOP IN AUTO OR MAN MODE. CREW COMMENTS: AFTER PUSHBACK & AFTER FLAP ACTIVATION GOT EICAS C HYD DEM PUMP. SWITCH TO ON-NO CHANGE. AREA AROUND ADP REQUIRES CLEAN-UP. APPEARS THAT PAINT HAS DEGRADED DUE TO HYD LEAK. REQUIRES CLEAN-UP. REPLACED CENTER ADP. CLEANED AREA AFTER ADP REPLACEMENT.