As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG "HYD PRESS PRI C1" FAULT DISPLAYED. CREW CYCLED SW AND FAULT REOCCURED. DISCONNECTED CAP AND STOWED CONNECTOR J8, ON P100 PANEL PER MEL. MSG 2912015 HIT 2 LEGS BEFORE SYSTEM DEACTIVATED. REPLACED ELCU M29303 & TESTED REF MM, SYSTEM TESTS NORMAL.