As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DID NOT RETRACT ON T/O, DURING GEAR RETRACTION A/C SHUDDERED, CENTER HYD SYS EICAS MSG CAME ON, CENTER HYD PUMP LOW PRESS LTS CAME ON. DEMAND PUMP LOW PRESS LTS CAME ON WHEN GEAR HANDLE WAS PLACED IN DOWN POSITION. CENTER HYD SYS RETURNED TO NORMAL. GEAR WENT DOWN AND GREEN. REPLACED ADP PRSOV VALVE, SYSTEM OPS CHECKS GOOD.