As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IMMEDIATELY AFTER T/O WHEN GEAR LEVER HANDLE PLACED IN "UP" POSITION RECEIVED A MASTER WARNING EICAS MSG "LG LEVER DISAGREE". THE NOSE WHEEL SHOWED UP AND WHITE THE MAINS SHOWED DOWN AND RED. THE HYD FLUID INDICATED ZERO WITH NO PRESS ON THE LT HYD SYSTEM. CREW ALSO HAD ASSOCIATED EICAS MESSAGES "HYD SYS 1 FAIL" HYD SYS 1 INOP" HYD 1 LOW QTY" E1 HYD PUMP FAIL. CREW DECLARED AN EMERGENCY, CREW WAS ABLE TO GET THE LANDING GEAR DOWN AND LOCKED. AFTER A FLYBY CREW LANDED UNEVENTFULLY.